semantic-conventions/docs/dotnet/dotnet-aspnetcore-metrics.md

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# Semantic conventions for ASP.NET Core metrics

**Status**: [Stable][DocumentStatus]

This article defines semantic conventions for ASP.NET Core metrics.

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- [Server](#server)
- [Routing](#routing)
  - [Metric: `aspnetcore.routing.match_attempts`](#metric-aspnetcoreroutingmatch_attempts)
- [Exceptions](#exceptions)
  - [Metric: `aspnetcore.diagnostics.exceptions`](#metric-aspnetcorediagnosticsexceptions)
- [Rate-limiting](#rate-limiting)
  - [Metric: `aspnetcore.rate_limiting.active_request_leases`](#metric-aspnetcorerate_limitingactive_request_leases)
  - [Metric: `aspnetcore.rate_limiting.request_lease.duration`](#metric-aspnetcorerate_limitingrequest_leaseduration)
  - [Metric: `aspnetcore.rate_limiting.queued_requests`](#metric-aspnetcorerate_limitingqueued_requests)
  - [Metric: `aspnetcore.rate_limiting.request.time_in_queue`](#metric-aspnetcorerate_limitingrequesttime_in_queue)
  - [Metric: `aspnetcore.rate_limiting.requests`](#metric-aspnetcorerate_limitingrequests)
- [Memory pool](#memory-pool)
  - [Metric: `aspnetcore.memory_pool.pooled`](#metric-aspnetcorememory_poolpooled)
  - [Metric: `aspnetcore.memory_pool.evicted`](#metric-aspnetcorememory_poolevicted)
  - [Metric: `aspnetcore.memory_pool.allocated`](#metric-aspnetcorememory_poolallocated)
  - [Metric: `aspnetcore.memory_pool.rented`](#metric-aspnetcorememory_poolrented)
- [Authentication](#authentication)
  - [Metric: `aspnetcore.authentication.authenticate.duration`](#metric-aspnetcoreauthenticationauthenticateduration)
  - [Metric: `aspnetcore.authentication.challenges`](#metric-aspnetcoreauthenticationchallenges)
  - [Metric: `aspnetcore.authentication.forbids`](#metric-aspnetcoreauthenticationforbids)
  - [Metric: `aspnetcore.authentication.sign_ins`](#metric-aspnetcoreauthenticationsign_ins)
  - [Metric: `aspnetcore.authentication.sign_outs`](#metric-aspnetcoreauthenticationsign_outs)
- [Authorization](#authorization)
  - [Metric: `aspnetcore.authorization.attempts`](#metric-aspnetcoreauthorizationattempts)
- [Identity](#identity)
  - [Metric: `aspnetcore.identity.user.create.duration`](#metric-aspnetcoreidentityusercreateduration)
  - [Metric: `aspnetcore.identity.user.update.duration`](#metric-aspnetcoreidentityuserupdateduration)
  - [Metric: `aspnetcore.identity.user.delete.duration`](#metric-aspnetcoreidentityuserdeleteduration)
  - [Metric: `aspnetcore.identity.user.check_password_attempts`](#metric-aspnetcoreidentityusercheck_password_attempts)
  - [Metric: `aspnetcore.identity.user.generated_tokens`](#metric-aspnetcoreidentityusergenerated_tokens)
  - [Metric: `aspnetcore.identity.user.verify_token_attempts`](#metric-aspnetcoreidentityuserverify_token_attempts)
  - [Metric: `aspnetcore.identity.sign_in.authenticate.duration`](#metric-aspnetcoreidentitysign_inauthenticateduration)
  - [Metric: `aspnetcore.identity.sign_in.check_password_attempts`](#metric-aspnetcoreidentitysign_incheck_password_attempts)
  - [Metric: `aspnetcore.identity.sign_in.sign_ins`](#metric-aspnetcoreidentitysign_insign_ins)
  - [Metric: `aspnetcore.identity.sign_in.sign_outs`](#metric-aspnetcoreidentitysign_insign_outs)
  - [Metric: `aspnetcore.identity.sign_in.two_factor_clients_remembered`](#metric-aspnetcoreidentitysign_intwo_factor_clients_remembered)
  - [Metric: `aspnetcore.identity.sign_in.two_factor_clients_forgotten`](#metric-aspnetcoreidentitysign_intwo_factor_clients_forgotten)

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## Server

## Routing

All routing metrics are reported by the `Microsoft.AspNetCore.Routing` meter.

### Metric: `aspnetcore.routing.match_attempts`

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| Name     | Instrument Type | Unit (UCUM) | Description    | Stability | Entity Associations |
| -------- | --------------- | ----------- | -------------- | --------- | ------ |
| `aspnetcore.routing.match_attempts` | Counter | `{match_attempt}` | Number of requests that were attempted to be matched to an endpoint. [1] | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |  |

**[1]:** Meter name: `Microsoft.AspNetCore.Routing`; Added in: ASP.NET Core 8.0

| Attribute  | Type | Description  | Examples  | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability |
|---|---|---|---|---|---|
| [`aspnetcore.routing.match_status`](/docs/registry/attributes/aspnetcore.md) | string | Match result - success or failure | `success`; `failure` | `Required` | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |
| [`aspnetcore.routing.is_fallback`](/docs/registry/attributes/aspnetcore.md) | boolean | A value that indicates whether the matched route is a fallback route. | `true` | `Conditionally Required` if and only if a route was successfully matched. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |
| [`http.route`](/docs/registry/attributes/http.md) | string | The matched route template for the request. This MUST be low-cardinality and include all static path segments, with dynamic path segments represented with placeholders. [1] | `/users/:userID?`; `my-controller/my-action/{id?}` | `Conditionally Required` if and only if a route was successfully matched. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

**[1] `http.route`:** MUST NOT be populated when this is not supported by the HTTP server framework as the route attribute should have low-cardinality and the URI path can NOT substitute it.
SHOULD include the [application root](/docs/http/http-spans.md#http-server-definitions) if there is one.

A static path segment is a part of the route template with a fixed, low-cardinality value. This includes literal strings like `/users/` and placeholders that
are constrained to a finite, predefined set of values, e.g. `{controller}` or `{action}`.

A dynamic path segment is a placeholder for a value that can have high cardinality and is not constrained to a predefined list like static path segments.

Instrumentations SHOULD use routing information provided by the corresponding web framework. They SHOULD pick the most precise source of routing information and MAY
support custom route formatting. Instrumentations SHOULD document the format and the API used to obtain the route string.

---

`aspnetcore.routing.match_status` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

| Value  | Description | Stability |
|---|---|---|
| `failure` | Match failed | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |
| `success` | Match succeeded | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

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## Exceptions

Exceptions Metric is reported by the `Microsoft.AspNetCore.Diagnostics` meter.

### Metric: `aspnetcore.diagnostics.exceptions`

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| Name     | Instrument Type | Unit (UCUM) | Description    | Stability | Entity Associations |
| -------- | --------------- | ----------- | -------------- | --------- | ------ |
| `aspnetcore.diagnostics.exceptions` | Counter | `{exception}` | Number of exceptions caught by exception handling middleware. [1] | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |  |

**[1]:** Meter name: `Microsoft.AspNetCore.Diagnostics`; Added in: ASP.NET Core 8.0

| Attribute  | Type | Description  | Examples  | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability |
|---|---|---|---|---|---|
| [`aspnetcore.diagnostics.exception.result`](/docs/registry/attributes/aspnetcore.md) | string | ASP.NET Core exception middleware handling result. | `handled`; `unhandled` | `Required` | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |
| [`error.type`](/docs/registry/attributes/error.md) | string | The full name of exception type. | `System.OperationCanceledException`; `Contoso.MyException` | `Required` | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |
| [`aspnetcore.diagnostics.handler.type`](/docs/registry/attributes/aspnetcore.md) | string | Full type name of the [`IExceptionHandler`](https://learn.microsoft.com/dotnet/api/microsoft.aspnetcore.diagnostics.iexceptionhandler) implementation that handled the exception. | `Contoso.MyHandler` | `Conditionally Required` [1] | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

**[1] `aspnetcore.diagnostics.handler.type`:** if and only if the exception was handled by this handler.

---

`aspnetcore.diagnostics.exception.result` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

| Value  | Description | Stability |
|---|---|---|
| `aborted` | Exception handling didn't run because the request was aborted. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |
| `handled` | Exception was handled by the exception handling middleware. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |
| `skipped` | Exception handling was skipped because the response had started. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |
| `unhandled` | Exception was not handled by the exception handling middleware. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

---

`error.type` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

| Value  | Description | Stability |
|---|---|---|
| `_OTHER` | A fallback error value to be used when the instrumentation doesn't define a custom value. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

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## Rate-limiting

All rate-limiting metrics are reported by the `Microsoft.AspNetCore.RateLimiting` meter.

### Metric: `aspnetcore.rate_limiting.active_request_leases`

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| Name     | Instrument Type | Unit (UCUM) | Description    | Stability | Entity Associations |
| -------- | --------------- | ----------- | -------------- | --------- | ------ |
| `aspnetcore.rate_limiting.active_request_leases` | UpDownCounter | `{request}` | Number of requests that are currently active on the server that hold a rate limiting lease. [1] | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |  |

**[1]:** Meter name: `Microsoft.AspNetCore.RateLimiting`; Added in: ASP.NET Core 8.0

| Attribute  | Type | Description  | Examples  | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability |
|---|---|---|---|---|---|
| [`aspnetcore.rate_limiting.policy`](/docs/registry/attributes/aspnetcore.md) | string | Rate limiting policy name. | `fixed`; `sliding`; `token` | `Conditionally Required` [1] | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

**[1] `aspnetcore.rate_limiting.policy`:** if the matched endpoint for the request had a rate-limiting policy.

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### Metric: `aspnetcore.rate_limiting.request_lease.duration`

this metric SHOULD be specified with
[`ExplicitBucketBoundaries`](https://github.com/open-telemetry/opentelemetry-specification/tree/v1.49.0/specification/metrics/api.md#instrument-advisory-parameters)
of `[ 0.005, 0.01, 0.025, 0.05, 0.075, 0.1, 0.25, 0.5, 0.75, 1, 2.5, 5, 7.5, 10 ]`.

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| Name     | Instrument Type | Unit (UCUM) | Description    | Stability | Entity Associations |
| -------- | --------------- | ----------- | -------------- | --------- | ------ |
| `aspnetcore.rate_limiting.request_lease.duration` | Histogram | `s` | The duration of rate limiting lease held by requests on the server. [1] | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |  |

**[1]:** Meter name: `Microsoft.AspNetCore.RateLimiting`; Added in: ASP.NET Core 8.0

| Attribute  | Type | Description  | Examples  | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability |
|---|---|---|---|---|---|
| [`aspnetcore.rate_limiting.policy`](/docs/registry/attributes/aspnetcore.md) | string | Rate limiting policy name. | `fixed`; `sliding`; `token` | `Conditionally Required` [1] | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

**[1] `aspnetcore.rate_limiting.policy`:** if the matched endpoint for the request had a rate-limiting policy.

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### Metric: `aspnetcore.rate_limiting.queued_requests`

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| Name     | Instrument Type | Unit (UCUM) | Description    | Stability | Entity Associations |
| -------- | --------------- | ----------- | -------------- | --------- | ------ |
| `aspnetcore.rate_limiting.queued_requests` | UpDownCounter | `{request}` | Number of requests that are currently queued, waiting to acquire a rate limiting lease. [1] | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |  |

**[1]:** Meter name: `Microsoft.AspNetCore.RateLimiting`; Added in: ASP.NET Core 8.0

| Attribute  | Type | Description  | Examples  | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability |
|---|---|---|---|---|---|
| [`aspnetcore.rate_limiting.policy`](/docs/registry/attributes/aspnetcore.md) | string | Rate limiting policy name. | `fixed`; `sliding`; `token` | `Conditionally Required` [1] | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

**[1] `aspnetcore.rate_limiting.policy`:** if the matched endpoint for the request had a rate-limiting policy.

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### Metric: `aspnetcore.rate_limiting.request.time_in_queue`

this metric SHOULD be specified with
[`ExplicitBucketBoundaries`](https://github.com/open-telemetry/opentelemetry-specification/tree/v1.49.0/specification/metrics/api.md#instrument-advisory-parameters)
of `[ 0.005, 0.01, 0.025, 0.05, 0.075, 0.1, 0.25, 0.5, 0.75, 1, 2.5, 5, 7.5, 10 ]`.

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| Name     | Instrument Type | Unit (UCUM) | Description    | Stability | Entity Associations |
| -------- | --------------- | ----------- | -------------- | --------- | ------ |
| `aspnetcore.rate_limiting.request.time_in_queue` | Histogram | `s` | The time the request spent in a queue waiting to acquire a rate limiting lease. [1] | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |  |

**[1]:** Meter name: `Microsoft.AspNetCore.RateLimiting`; Added in: ASP.NET Core 8.0

| Attribute  | Type | Description  | Examples  | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability |
|---|---|---|---|---|---|
| [`aspnetcore.rate_limiting.result`](/docs/registry/attributes/aspnetcore.md) | string | Rate-limiting result, shows whether the lease was acquired or contains a rejection reason | `acquired`; `request_canceled` | `Required` | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |
| [`aspnetcore.rate_limiting.policy`](/docs/registry/attributes/aspnetcore.md) | string | Rate limiting policy name. | `fixed`; `sliding`; `token` | `Conditionally Required` [1] | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

**[1] `aspnetcore.rate_limiting.policy`:** if the matched endpoint for the request had a rate-limiting policy.

---

`aspnetcore.rate_limiting.result` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

| Value  | Description | Stability |
|---|---|---|
| `acquired` | Lease was acquired | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |
| `endpoint_limiter` | Lease request was rejected by the endpoint limiter | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |
| `global_limiter` | Lease request was rejected by the global limiter | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |
| `request_canceled` | Lease request was canceled | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

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### Metric: `aspnetcore.rate_limiting.requests`

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| Name     | Instrument Type | Unit (UCUM) | Description    | Stability | Entity Associations |
| -------- | --------------- | ----------- | -------------- | --------- | ------ |
| `aspnetcore.rate_limiting.requests` | Counter | `{request}` | Number of requests that tried to acquire a rate limiting lease. [1] | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |  |

**[1]:** Requests could be:

* Rejected by global or endpoint rate limiting policies
* Canceled while waiting for the lease.

Meter name: `Microsoft.AspNetCore.RateLimiting`; Added in: ASP.NET Core 8.0

| Attribute  | Type | Description  | Examples  | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability |
|---|---|---|---|---|---|
| [`aspnetcore.rate_limiting.result`](/docs/registry/attributes/aspnetcore.md) | string | Rate-limiting result, shows whether the lease was acquired or contains a rejection reason | `acquired`; `request_canceled` | `Required` | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |
| [`aspnetcore.rate_limiting.policy`](/docs/registry/attributes/aspnetcore.md) | string | Rate limiting policy name. | `fixed`; `sliding`; `token` | `Conditionally Required` [1] | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

**[1] `aspnetcore.rate_limiting.policy`:** if the matched endpoint for the request had a rate-limiting policy.

---

`aspnetcore.rate_limiting.result` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

| Value  | Description | Stability |
|---|---|---|
| `acquired` | Lease was acquired | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |
| `endpoint_limiter` | Lease request was rejected by the endpoint limiter | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |
| `global_limiter` | Lease request was rejected by the global limiter | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |
| `request_canceled` | Lease request was canceled | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

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## Memory pool

All memory pool metrics are reported by the `Microsoft.AspNetCore.MemoryPool` meter.

### Metric: `aspnetcore.memory_pool.pooled`

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| Name     | Instrument Type | Unit (UCUM) | Description    | Stability | Entity Associations |
| -------- | --------------- | ----------- | -------------- | --------- | ------ |
| `aspnetcore.memory_pool.pooled` | UpDownCounter | `By` | Number of bytes currently pooled and available for reuse. [1] | ![Development](https://img.shields.io/badge/-development-blue) |  |

**[1]:** Meter name: `Microsoft.AspNetCore.MemoryPool`; Added in: ASP.NET Core 10.0

| Attribute  | Type | Description  | Examples  | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability |
|---|---|---|---|---|---|
| [`aspnetcore.memory_pool.owner`](/docs/registry/attributes/aspnetcore.md) | string | The name of the library or subsystem using the memory pool instance. | `kestrel`; `iis` | `Conditionally Required` [1] | ![Development](https://img.shields.io/badge/-development-blue) |

**[1] `aspnetcore.memory_pool.owner`:** if owner is specified when the memory pool is created.

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### Metric: `aspnetcore.memory_pool.evicted`

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| Name     | Instrument Type | Unit (UCUM) | Description    | Stability | Entity Associations |
| -------- | --------------- | ----------- | -------------- | --------- | ------ |
| `aspnetcore.memory_pool.evicted` | Counter | `By` | Total number of bytes evicted from the memory pool. Eviction occurs when idle pooled memory is reclaimed. [1] | ![Development](https://img.shields.io/badge/-development-blue) |  |

**[1]:** Meter name: `Microsoft.AspNetCore.MemoryPool`; Added in: ASP.NET Core 10.0

| Attribute  | Type | Description  | Examples  | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability |
|---|---|---|---|---|---|
| [`aspnetcore.memory_pool.owner`](/docs/registry/attributes/aspnetcore.md) | string | The name of the library or subsystem using the memory pool instance. | `kestrel`; `iis` | `Conditionally Required` [1] | ![Development](https://img.shields.io/badge/-development-blue) |

**[1] `aspnetcore.memory_pool.owner`:** if owner is specified when the memory pool is created.

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### Metric: `aspnetcore.memory_pool.allocated`

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| Name     | Instrument Type | Unit (UCUM) | Description    | Stability | Entity Associations |
| -------- | --------------- | ----------- | -------------- | --------- | ------ |
| `aspnetcore.memory_pool.allocated` | Counter | `By` | Total number of bytes allocated by the memory pool. Allocation occurs when a memory rental request exceeds the available pooled memory. [1] | ![Development](https://img.shields.io/badge/-development-blue) |  |

**[1]:** Meter name: `Microsoft.AspNetCore.MemoryPool`; Added in: ASP.NET Core 10.0

| Attribute  | Type | Description  | Examples  | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability |
|---|---|---|---|---|---|
| [`aspnetcore.memory_pool.owner`](/docs/registry/attributes/aspnetcore.md) | string | The name of the library or subsystem using the memory pool instance. | `kestrel`; `iis` | `Conditionally Required` [1] | ![Development](https://img.shields.io/badge/-development-blue) |

**[1] `aspnetcore.memory_pool.owner`:** if owner is specified when the memory pool is created.

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### Metric: `aspnetcore.memory_pool.rented`

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| Name     | Instrument Type | Unit (UCUM) | Description    | Stability | Entity Associations |
| -------- | --------------- | ----------- | -------------- | --------- | ------ |
| `aspnetcore.memory_pool.rented` | Counter | `By` | Total number of bytes rented from the memory pool. [1] | ![Development](https://img.shields.io/badge/-development-blue) |  |

**[1]:** Meter name: `Microsoft.AspNetCore.MemoryPool`; Added in: ASP.NET Core 10.0

| Attribute  | Type | Description  | Examples  | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability |
|---|---|---|---|---|---|
| [`aspnetcore.memory_pool.owner`](/docs/registry/attributes/aspnetcore.md) | string | The name of the library or subsystem using the memory pool instance. | `kestrel`; `iis` | `Conditionally Required` [1] | ![Development](https://img.shields.io/badge/-development-blue) |

**[1] `aspnetcore.memory_pool.owner`:** if owner is specified when the memory pool is created.

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## Authentication

All authentication metrics are reported by the `Microsoft.AspNetCore.Authentication` meter.

### Metric: `aspnetcore.authentication.authenticate.duration`

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| Name     | Instrument Type | Unit (UCUM) | Description    | Stability | Entity Associations |
| -------- | --------------- | ----------- | -------------- | --------- | ------ |
| `aspnetcore.authentication.authenticate.duration` | Histogram | `s` | The authentication duration for a request. [1] | ![Development](https://img.shields.io/badge/-development-blue) |  |

**[1]:** Meter name: `Microsoft.AspNetCore.Authentication`; Added in: ASP.NET Core 10.0

| Attribute  | Type | Description  | Examples  | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability |
|---|---|---|---|---|---|
| [`aspnetcore.authentication.result`](/docs/registry/attributes/aspnetcore.md) | string | The result of the authentication operation. | `success`; `failure` | `Required` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`aspnetcore.authentication.scheme`](/docs/registry/attributes/aspnetcore.md) | string | The identifier that names a particular authentication handler. | `Cookies`; `Bearer`; `Identity.Application` | `Conditionally Required` if a scheme is specified during authentication. | ![Development](https://img.shields.io/badge/-development-blue) |
| [`error.type`](/docs/registry/attributes/error.md) | string | The full name of exception type. | `System.OperationCanceledException` | `Conditionally Required` if and only if an error has occurred. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

---

`aspnetcore.authentication.result` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

| Value  | Description | Stability |
|---|---|---|
| `failure` | Authentication failed. | ![Development](https://img.shields.io/badge/-development-blue) |
| `none` | No authentication information returned. | ![Development](https://img.shields.io/badge/-development-blue) |
| `success` | Authentication was successful. | ![Development](https://img.shields.io/badge/-development-blue) |

---

`error.type` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

| Value  | Description | Stability |
|---|---|---|
| `_OTHER` | A fallback error value to be used when the instrumentation doesn't define a custom value. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

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### Metric: `aspnetcore.authentication.challenges`

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| Name     | Instrument Type | Unit (UCUM) | Description    | Stability | Entity Associations |
| -------- | --------------- | ----------- | -------------- | --------- | ------ |
| `aspnetcore.authentication.challenges` | Counter | `{challenge}` | The total number of times a scheme is challenged. [1] | ![Development](https://img.shields.io/badge/-development-blue) |  |

**[1]:** Meter name: `Microsoft.AspNetCore.Authentication`; Added in: ASP.NET Core 10.0

| Attribute  | Type | Description  | Examples  | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability |
|---|---|---|---|---|---|
| [`aspnetcore.authentication.scheme`](/docs/registry/attributes/aspnetcore.md) | string | The identifier that names a particular authentication handler. | `Cookies`; `Bearer`; `Identity.Application` | `Conditionally Required` if a scheme is specified during authentication. | ![Development](https://img.shields.io/badge/-development-blue) |
| [`error.type`](/docs/registry/attributes/error.md) | string | The full name of exception type. | `System.OperationCanceledException` | `Conditionally Required` if and only if an error has occurred. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

---

`error.type` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

| Value  | Description | Stability |
|---|---|---|
| `_OTHER` | A fallback error value to be used when the instrumentation doesn't define a custom value. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

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### Metric: `aspnetcore.authentication.forbids`

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| Name     | Instrument Type | Unit (UCUM) | Description    | Stability | Entity Associations |
| -------- | --------------- | ----------- | -------------- | --------- | ------ |
| `aspnetcore.authentication.forbids` | Counter | `{forbid}` | The total number of times an authenticated user attempts to access a resource they are not permitted to access. [1] | ![Development](https://img.shields.io/badge/-development-blue) |  |

**[1]:** Meter name: `Microsoft.AspNetCore.Authentication`; Added in: ASP.NET Core 10.0

| Attribute  | Type | Description  | Examples  | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability |
|---|---|---|---|---|---|
| [`aspnetcore.authentication.scheme`](/docs/registry/attributes/aspnetcore.md) | string | The identifier that names a particular authentication handler. | `Cookies`; `Bearer`; `Identity.Application` | `Conditionally Required` if a scheme is specified during authentication. | ![Development](https://img.shields.io/badge/-development-blue) |
| [`error.type`](/docs/registry/attributes/error.md) | string | The full name of exception type. | `System.OperationCanceledException` | `Conditionally Required` if and only if an error has occurred. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

---

`error.type` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

| Value  | Description | Stability |
|---|---|---|
| `_OTHER` | A fallback error value to be used when the instrumentation doesn't define a custom value. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

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### Metric: `aspnetcore.authentication.sign_ins`

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| Name     | Instrument Type | Unit (UCUM) | Description    | Stability | Entity Associations |
| -------- | --------------- | ----------- | -------------- | --------- | ------ |
| `aspnetcore.authentication.sign_ins` | Counter | `{sign_in}` | The total number of times a principal is signed in with a scheme. [1] | ![Development](https://img.shields.io/badge/-development-blue) |  |

**[1]:** Meter name: `Microsoft.AspNetCore.Authentication`; Added in: ASP.NET Core 10.0

| Attribute  | Type | Description  | Examples  | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability |
|---|---|---|---|---|---|
| [`aspnetcore.authentication.scheme`](/docs/registry/attributes/aspnetcore.md) | string | The identifier that names a particular authentication handler. | `Cookies`; `Bearer`; `Identity.Application` | `Conditionally Required` if a scheme is specified during authentication. | ![Development](https://img.shields.io/badge/-development-blue) |
| [`error.type`](/docs/registry/attributes/error.md) | string | The full name of exception type. | `System.OperationCanceledException` | `Conditionally Required` if and only if an error has occurred. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

---

`error.type` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

| Value  | Description | Stability |
|---|---|---|
| `_OTHER` | A fallback error value to be used when the instrumentation doesn't define a custom value. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

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### Metric: `aspnetcore.authentication.sign_outs`

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| Name     | Instrument Type | Unit (UCUM) | Description    | Stability | Entity Associations |
| -------- | --------------- | ----------- | -------------- | --------- | ------ |
| `aspnetcore.authentication.sign_outs` | Counter | `{sign_out}` | The total number of times a principal is signed out with a scheme. [1] | ![Development](https://img.shields.io/badge/-development-blue) |  |

**[1]:** Meter name: `Microsoft.AspNetCore.Authentication`; Added in: ASP.NET Core 10.0

| Attribute  | Type | Description  | Examples  | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability |
|---|---|---|---|---|---|
| [`aspnetcore.authentication.scheme`](/docs/registry/attributes/aspnetcore.md) | string | The identifier that names a particular authentication handler. | `Cookies`; `Bearer`; `Identity.Application` | `Conditionally Required` if a scheme is specified during authentication. | ![Development](https://img.shields.io/badge/-development-blue) |
| [`error.type`](/docs/registry/attributes/error.md) | string | The full name of exception type. | `System.OperationCanceledException` | `Conditionally Required` if and only if an error has occurred. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

---

`error.type` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

| Value  | Description | Stability |
|---|---|---|
| `_OTHER` | A fallback error value to be used when the instrumentation doesn't define a custom value. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

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<!-- endsemconv -->

## Authorization

All authorization metrics are reported by the `Microsoft.AspNetCore.Authorization` meter.

### Metric: `aspnetcore.authorization.attempts`

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| Name     | Instrument Type | Unit (UCUM) | Description    | Stability | Entity Associations |
| -------- | --------------- | ----------- | -------------- | --------- | ------ |
| `aspnetcore.authorization.attempts` | Counter | `{attempt}` | The total number of authorization attempts. [1] | ![Development](https://img.shields.io/badge/-development-blue) |  |

**[1]:** Meter name: `Microsoft.AspNetCore.Authorization`; Added in: ASP.NET Core 10.0

| Attribute  | Type | Description  | Examples  | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability |
|---|---|---|---|---|---|
| [`aspnetcore.user.is_authenticated`](/docs/registry/attributes/aspnetcore.md) | boolean | A value that indicates whether the user is authenticated. | `true` | `Required` | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |
| [`aspnetcore.authorization.policy`](/docs/registry/attributes/aspnetcore.md) | string | The name of the authorization policy. | `RequireAdminRole` | `Conditionally Required` if a policy is specified. | ![Development](https://img.shields.io/badge/-development-blue) |
| [`aspnetcore.authorization.result`](/docs/registry/attributes/aspnetcore.md) | string | The result of calling the authorization service. | `success`; `failure` | `Conditionally Required` if no exception was thrown. | ![Development](https://img.shields.io/badge/-development-blue) |
| [`error.type`](/docs/registry/attributes/error.md) | string | The full name of exception type. | `System.OperationCanceledException` | `Conditionally Required` if and only if an error has occurred. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

---

`aspnetcore.authorization.result` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

| Value  | Description | Stability |
|---|---|---|
| `failure` | Authorization failed. | ![Development](https://img.shields.io/badge/-development-blue) |
| `success` | Authorization was successful. | ![Development](https://img.shields.io/badge/-development-blue) |

---

`error.type` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

| Value  | Description | Stability |
|---|---|---|
| `_OTHER` | A fallback error value to be used when the instrumentation doesn't define a custom value. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

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## Identity

All ASP.NET Core Identity metrics are reported by the `Microsoft.AspNetCore.Identity` meter.

### Metric: `aspnetcore.identity.user.create.duration`

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| Name     | Instrument Type | Unit (UCUM) | Description    | Stability | Entity Associations |
| -------- | --------------- | ----------- | -------------- | --------- | ------ |
| `aspnetcore.identity.user.create.duration` | Histogram | `s` | The duration of user creation operations. [1] | ![Development](https://img.shields.io/badge/-development-blue) |  |

**[1]:** Meter name: `Microsoft.AspNetCore.Identity`; Added in: ASP.NET Core 10.0

| Attribute  | Type | Description  | Examples  | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability |
|---|---|---|---|---|---|
| [`aspnetcore.identity.user_type`](/docs/registry/attributes/aspnetcore.md) | string | The full name of the identity user type. | `Contoso.ContosoUser` | `Required` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`aspnetcore.identity.error_code`](/docs/registry/attributes/aspnetcore.md) | string | The error code for a failed identity operation. | `DefaultError`; `PasswordMismatch` | `Conditionally Required` if an error was set on a failed identity result. | ![Development](https://img.shields.io/badge/-development-blue) |
| [`aspnetcore.identity.result`](/docs/registry/attributes/aspnetcore.md) | string | The result of the identity operation. | `success`; `failure` | `Conditionally Required` if no exception was thrown. | ![Development](https://img.shields.io/badge/-development-blue) |
| [`error.type`](/docs/registry/attributes/error.md) | string | The full name of exception type or the identity error code. | `System.OperationCanceledException`; `PasswordMismatch` | `Conditionally Required` if and only if an error has occurred. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

---

`aspnetcore.identity.result` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

| Value  | Description | Stability |
|---|---|---|
| `failure` | Identity operation failed. | ![Development](https://img.shields.io/badge/-development-blue) |
| `success` | Identity operation was successful. | ![Development](https://img.shields.io/badge/-development-blue) |

---

`error.type` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

| Value  | Description | Stability |
|---|---|---|
| `_OTHER` | A fallback error value to be used when the instrumentation doesn't define a custom value. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

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### Metric: `aspnetcore.identity.user.update.duration`

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| Name     | Instrument Type | Unit (UCUM) | Description    | Stability | Entity Associations |
| -------- | --------------- | ----------- | -------------- | --------- | ------ |
| `aspnetcore.identity.user.update.duration` | Histogram | `s` | The duration of user update operations. [1] | ![Development](https://img.shields.io/badge/-development-blue) |  |

**[1]:** Meter name: `Microsoft.AspNetCore.Identity`; Added in: ASP.NET Core 10.0

| Attribute  | Type | Description  | Examples  | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability |
|---|---|---|---|---|---|
| [`aspnetcore.identity.user.update_type`](/docs/registry/attributes/aspnetcore.md) | string | The user update type. | `update`; `user_name`; `reset_password` | `Required` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`aspnetcore.identity.user_type`](/docs/registry/attributes/aspnetcore.md) | string | The full name of the identity user type. | `Contoso.ContosoUser` | `Required` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`aspnetcore.identity.error_code`](/docs/registry/attributes/aspnetcore.md) | string | The error code for a failed identity operation. | `DefaultError`; `PasswordMismatch` | `Conditionally Required` if an error was set on a failed identity result. | ![Development](https://img.shields.io/badge/-development-blue) |
| [`aspnetcore.identity.result`](/docs/registry/attributes/aspnetcore.md) | string | The result of the identity operation. | `success`; `failure` | `Conditionally Required` if no exception was thrown. | ![Development](https://img.shields.io/badge/-development-blue) |
| [`error.type`](/docs/registry/attributes/error.md) | string | The full name of exception type or the identity error code. | `System.OperationCanceledException`; `PasswordMismatch` | `Conditionally Required` if and only if an error has occurred. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

---

`aspnetcore.identity.result` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

| Value  | Description | Stability |
|---|---|---|
| `failure` | Identity operation failed. | ![Development](https://img.shields.io/badge/-development-blue) |
| `success` | Identity operation was successful. | ![Development](https://img.shields.io/badge/-development-blue) |

---

`aspnetcore.identity.user.update_type` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

| Value  | Description | Stability |
|---|---|---|
| `_OTHER` | Any update type that the instrumentation has no prior knowledge of. | ![Development](https://img.shields.io/badge/-development-blue) |
| `access_failed` | Identity user access failure recorded. | ![Development](https://img.shields.io/badge/-development-blue) |
| `add_claims` | Identity user claims added. | ![Development](https://img.shields.io/badge/-development-blue) |
| `add_login` | Identity user login added. | ![Development](https://img.shields.io/badge/-development-blue) |
| `add_password` | Identity user password added. | ![Development](https://img.shields.io/badge/-development-blue) |
| `add_to_roles` | Identity user added to roles. | ![Development](https://img.shields.io/badge/-development-blue) |
| `change_email` | Identity user email changed. | ![Development](https://img.shields.io/badge/-development-blue) |
| `change_password` | Identity user password changed. | ![Development](https://img.shields.io/badge/-development-blue) |
| `change_phone_number` | Identity user phone number changed. | ![Development](https://img.shields.io/badge/-development-blue) |
| `confirm_email` | Identity user email confirmed. | ![Development](https://img.shields.io/badge/-development-blue) |
| `generate_new_two_factor_recovery_codes` | Identity user new two-factor recovery codes generated. | ![Development](https://img.shields.io/badge/-development-blue) |
| `password_rehash` | Identity user password rehashed. | ![Development](https://img.shields.io/badge/-development-blue) |
| `redeem_two_factor_recovery_code` | Identity user two-factor recovery code redeemed. | ![Development](https://img.shields.io/badge/-development-blue) |
| `remove_authentication_token` | Identity user authentication token removed. | ![Development](https://img.shields.io/badge/-development-blue) |
| `remove_claims` | Identity user claims removed. | ![Development](https://img.shields.io/badge/-development-blue) |
| `remove_from_roles` | Identity user removed from roles. | ![Development](https://img.shields.io/badge/-development-blue) |
| `remove_login` | Identity user login removed. | ![Development](https://img.shields.io/badge/-development-blue) |
| `remove_passkey` | Identity user passkey removed. | ![Development](https://img.shields.io/badge/-development-blue) |
| `remove_password` | Identity user password removed. | ![Development](https://img.shields.io/badge/-development-blue) |
| `replace_claim` | Identity user claim replaced. | ![Development](https://img.shields.io/badge/-development-blue) |
| `reset_access_failed_count` | Identity user access failure count reset. | ![Development](https://img.shields.io/badge/-development-blue) |
| `reset_authenticator_key` | Identity user authenticator key reset. | ![Development](https://img.shields.io/badge/-development-blue) |
| `reset_password` | Identity user password reset. | ![Development](https://img.shields.io/badge/-development-blue) |
| `security_stamp` | Identity user security stamp updated. | ![Development](https://img.shields.io/badge/-development-blue) |
| `set_authentication_token` | Identity user authentication token set. | ![Development](https://img.shields.io/badge/-development-blue) |
| `set_email` | Identity user email set. | ![Development](https://img.shields.io/badge/-development-blue) |
| `set_lockout_enabled` | Identity user lockout enabled or disabled. | ![Development](https://img.shields.io/badge/-development-blue) |
| `set_lockout_end_date` | Identity user lockout end date set. | ![Development](https://img.shields.io/badge/-development-blue) |
| `set_passkey` | Identity user passkey set. | ![Development](https://img.shields.io/badge/-development-blue) |
| `set_phone_number` | Identity user phone number set. | ![Development](https://img.shields.io/badge/-development-blue) |
| `set_two_factor_enabled` | Identity user two-factor authentication enabled or disabled. | ![Development](https://img.shields.io/badge/-development-blue) |
| `update` | Identity user updated. | ![Development](https://img.shields.io/badge/-development-blue) |
| `user_name` | Identity user name updated. | ![Development](https://img.shields.io/badge/-development-blue) |

---

`error.type` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

| Value  | Description | Stability |
|---|---|---|
| `_OTHER` | A fallback error value to be used when the instrumentation doesn't define a custom value. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

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### Metric: `aspnetcore.identity.user.delete.duration`

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| Name     | Instrument Type | Unit (UCUM) | Description    | Stability | Entity Associations |
| -------- | --------------- | ----------- | -------------- | --------- | ------ |
| `aspnetcore.identity.user.delete.duration` | Histogram | `s` | The duration of user deletion operations. [1] | ![Development](https://img.shields.io/badge/-development-blue) |  |

**[1]:** Meter name: `Microsoft.AspNetCore.Identity`; Added in: ASP.NET Core 10.0

| Attribute  | Type | Description  | Examples  | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability |
|---|---|---|---|---|---|
| [`aspnetcore.identity.user_type`](/docs/registry/attributes/aspnetcore.md) | string | The full name of the identity user type. | `Contoso.ContosoUser` | `Required` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`aspnetcore.identity.error_code`](/docs/registry/attributes/aspnetcore.md) | string | The error code for a failed identity operation. | `DefaultError`; `PasswordMismatch` | `Conditionally Required` if an error was set on a failed identity result. | ![Development](https://img.shields.io/badge/-development-blue) |
| [`aspnetcore.identity.result`](/docs/registry/attributes/aspnetcore.md) | string | The result of the identity operation. | `success`; `failure` | `Conditionally Required` if no exception was thrown. | ![Development](https://img.shields.io/badge/-development-blue) |
| [`error.type`](/docs/registry/attributes/error.md) | string | The full name of exception type or the identity error code. | `System.OperationCanceledException`; `PasswordMismatch` | `Conditionally Required` if and only if an error has occurred. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

---

`aspnetcore.identity.result` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

| Value  | Description | Stability |
|---|---|---|
| `failure` | Identity operation failed. | ![Development](https://img.shields.io/badge/-development-blue) |
| `success` | Identity operation was successful. | ![Development](https://img.shields.io/badge/-development-blue) |

---

`error.type` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

| Value  | Description | Stability |
|---|---|---|
| `_OTHER` | A fallback error value to be used when the instrumentation doesn't define a custom value. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

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### Metric: `aspnetcore.identity.user.check_password_attempts`

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| Name     | Instrument Type | Unit (UCUM) | Description    | Stability | Entity Associations |
| -------- | --------------- | ----------- | -------------- | --------- | ------ |
| `aspnetcore.identity.user.check_password_attempts` | Counter | `{attempt}` | The number of check password attempts. Only checks whether the password is valid and not whether the user account is in a state that can log in. [1] | ![Development](https://img.shields.io/badge/-development-blue) |  |

**[1]:** Meter name: `Microsoft.AspNetCore.Identity`; Added in: ASP.NET Core 10.0

| Attribute  | Type | Description  | Examples  | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability |
|---|---|---|---|---|---|
| [`aspnetcore.identity.user_type`](/docs/registry/attributes/aspnetcore.md) | string | The full name of the identity user type. | `Contoso.ContosoUser` | `Required` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`aspnetcore.identity.password_check_result`](/docs/registry/attributes/aspnetcore.md) | string | The result from checking the password. | `success`; `failure` | `Conditionally Required` if no exception was thrown. | ![Development](https://img.shields.io/badge/-development-blue) |
| [`error.type`](/docs/registry/attributes/error.md) | string | The full name of exception type. | `System.OperationCanceledException` | `Conditionally Required` if and only if an error has occurred. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

---

`aspnetcore.identity.password_check_result` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

| Value  | Description | Stability |
|---|---|---|
| `failure` | Password check failed. | ![Development](https://img.shields.io/badge/-development-blue) |
| `password_missing` | Password check couldn't proceed because the password was missing from the user. | ![Development](https://img.shields.io/badge/-development-blue) |
| `success` | Password check was successful. | ![Development](https://img.shields.io/badge/-development-blue) |
| `success_rehash_needed` | Password check was successful however the password was encoded using a deprecated algorithm and should be rehashed and updated. | ![Development](https://img.shields.io/badge/-development-blue) |
| `user_missing` | Password check couldn't proceed because the user was missing. | ![Development](https://img.shields.io/badge/-development-blue) |

---

`error.type` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

| Value  | Description | Stability |
|---|---|---|
| `_OTHER` | A fallback error value to be used when the instrumentation doesn't define a custom value. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

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<!-- endsemconv -->

### Metric: `aspnetcore.identity.user.generated_tokens`

<!-- semconv metric.aspnetcore.identity.user.generated_tokens -->
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| Name     | Instrument Type | Unit (UCUM) | Description    | Stability | Entity Associations |
| -------- | --------------- | ----------- | -------------- | --------- | ------ |
| `aspnetcore.identity.user.generated_tokens` | Counter | `{count}` | The total number of token generations. [1] | ![Development](https://img.shields.io/badge/-development-blue) |  |

**[1]:** Meter name: `Microsoft.AspNetCore.Identity`; Added in: ASP.NET Core 10.0

| Attribute  | Type | Description  | Examples  | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability |
|---|---|---|---|---|---|
| [`aspnetcore.identity.token_purpose`](/docs/registry/attributes/aspnetcore.md) | string | What the token will be used for. | `success`; `failure` | `Required` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`aspnetcore.identity.user_type`](/docs/registry/attributes/aspnetcore.md) | string | The full name of the identity user type. | `Contoso.ContosoUser` | `Required` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`error.type`](/docs/registry/attributes/error.md) | string | The full name of exception type. | `System.OperationCanceledException` | `Conditionally Required` if and only if an error has occurred. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

---

`aspnetcore.identity.token_purpose` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

| Value  | Description | Stability |
|---|---|---|
| `_OTHER` | Any token purpose that the instrumentation has no prior knowledge of. | ![Development](https://img.shields.io/badge/-development-blue) |
| `change_email` | The token is for changing the user email address. | ![Development](https://img.shields.io/badge/-development-blue) |
| `change_phone_number` | The token is for changing a user phone number. | ![Development](https://img.shields.io/badge/-development-blue) |
| `email_confirmation` | The token is for confirming user email address. | ![Development](https://img.shields.io/badge/-development-blue) |
| `reset_password` | The token is for resetting a user password. | ![Development](https://img.shields.io/badge/-development-blue) |
| `two_factor` | The token is for changing user two factor settings. | ![Development](https://img.shields.io/badge/-development-blue) |

---

`error.type` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

| Value  | Description | Stability |
|---|---|---|
| `_OTHER` | A fallback error value to be used when the instrumentation doesn't define a custom value. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

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<!-- endsemconv -->

### Metric: `aspnetcore.identity.user.verify_token_attempts`

<!-- semconv metric.aspnetcore.identity.user.verify_token_attempts -->
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| Name     | Instrument Type | Unit (UCUM) | Description    | Stability | Entity Associations |
| -------- | --------------- | ----------- | -------------- | --------- | ------ |
| `aspnetcore.identity.user.verify_token_attempts` | Counter | `{attempt}` | The total number of token verification attempts. [1] | ![Development](https://img.shields.io/badge/-development-blue) |  |

**[1]:** Meter name: `Microsoft.AspNetCore.Identity`; Added in: ASP.NET Core 10.0

| Attribute  | Type | Description  | Examples  | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability |
|---|---|---|---|---|---|
| [`aspnetcore.identity.token_purpose`](/docs/registry/attributes/aspnetcore.md) | string | What the token will be used for. | `success`; `failure` | `Required` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`aspnetcore.identity.user_type`](/docs/registry/attributes/aspnetcore.md) | string | The full name of the identity user type. | `Contoso.ContosoUser` | `Required` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`aspnetcore.identity.token_verified`](/docs/registry/attributes/aspnetcore.md) | string | The result of token verification. | `success`; `failure` | `Conditionally Required` if no exception was thrown. | ![Development](https://img.shields.io/badge/-development-blue) |
| [`error.type`](/docs/registry/attributes/error.md) | string | The full name of exception type. | `System.OperationCanceledException` | `Conditionally Required` if and only if an error has occurred. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

---

`aspnetcore.identity.token_purpose` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

| Value  | Description | Stability |
|---|---|---|
| `_OTHER` | Any token purpose that the instrumentation has no prior knowledge of. | ![Development](https://img.shields.io/badge/-development-blue) |
| `change_email` | The token is for changing the user email address. | ![Development](https://img.shields.io/badge/-development-blue) |
| `change_phone_number` | The token is for changing a user phone number. | ![Development](https://img.shields.io/badge/-development-blue) |
| `email_confirmation` | The token is for confirming user email address. | ![Development](https://img.shields.io/badge/-development-blue) |
| `reset_password` | The token is for resetting a user password. | ![Development](https://img.shields.io/badge/-development-blue) |
| `two_factor` | The token is for changing user two factor settings. | ![Development](https://img.shields.io/badge/-development-blue) |

---

`aspnetcore.identity.token_verified` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

| Value  | Description | Stability |
|---|---|---|
| `failure` | Token verification failed. | ![Development](https://img.shields.io/badge/-development-blue) |
| `success` | Token verification was successful. | ![Development](https://img.shields.io/badge/-development-blue) |

---

`error.type` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

| Value  | Description | Stability |
|---|---|---|
| `_OTHER` | A fallback error value to be used when the instrumentation doesn't define a custom value. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

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<!-- endsemconv -->

### Metric: `aspnetcore.identity.sign_in.authenticate.duration`

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| Name     | Instrument Type | Unit (UCUM) | Description    | Stability | Entity Associations |
| -------- | --------------- | ----------- | -------------- | --------- | ------ |
| `aspnetcore.identity.sign_in.authenticate.duration` | Histogram | `s` | The duration of authenticate attempts. The authenticate metrics is recorded by sign in methods such as PasswordSignInAsync and TwoFactorSignInAsync. [1] | ![Development](https://img.shields.io/badge/-development-blue) |  |

**[1]:** Meter name: `Microsoft.AspNetCore.Identity`; Added in: ASP.NET Core 10.0

| Attribute  | Type | Description  | Examples  | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability |
|---|---|---|---|---|---|
| [`aspnetcore.authentication.scheme`](/docs/registry/attributes/aspnetcore.md) | string | The identifier that names a particular authentication handler. | `Cookies`; `Bearer`; `Identity.Application` | `Required` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`aspnetcore.identity.sign_in.type`](/docs/registry/attributes/aspnetcore.md) | string | The authentication type. | `password`; `two_factor` | `Required` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`aspnetcore.identity.user_type`](/docs/registry/attributes/aspnetcore.md) | string | The full name of the identity user type. | `Contoso.ContosoUser` | `Required` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`aspnetcore.identity.sign_in.result`](/docs/registry/attributes/aspnetcore.md) | string | Whether the sign in result was success or failure. | `password`; `two_factor` | `Conditionally Required` if no exception was thrown. | ![Development](https://img.shields.io/badge/-development-blue) |
| [`aspnetcore.sign_in.is_persistent`](/docs/registry/attributes/aspnetcore.md) | boolean | A flag indicating whether the sign in is persistent. |  | `Conditionally Required` if no exception was thrown. | ![Development](https://img.shields.io/badge/-development-blue) |
| [`error.type`](/docs/registry/attributes/error.md) | string | The full name of exception type. | `System.OperationCanceledException` | `Conditionally Required` if and only if an error has occurred. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

---

`aspnetcore.identity.sign_in.result` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

| Value  | Description | Stability |
|---|---|---|
| `failure` | Sign in failed. | ![Development](https://img.shields.io/badge/-development-blue) |
| `locked_out` | User is locked out. | ![Development](https://img.shields.io/badge/-development-blue) |
| `not_allowed` | User is not allowed to sign in. | ![Development](https://img.shields.io/badge/-development-blue) |
| `requires_two_factor` | User requires two factory authentication to sign in. | ![Development](https://img.shields.io/badge/-development-blue) |
| `success` | Sign in was successful. | ![Development](https://img.shields.io/badge/-development-blue) |

---

`aspnetcore.identity.sign_in.type` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

| Value  | Description | Stability |
|---|---|---|
| `external` | Sign in with a previously registered third-party login. | ![Development](https://img.shields.io/badge/-development-blue) |
| `passkey` | Sign in with passkey. | ![Development](https://img.shields.io/badge/-development-blue) |
| `password` | Sign in with password. | ![Development](https://img.shields.io/badge/-development-blue) |
| `two_factor` | Sign in with a two factor provider. | ![Development](https://img.shields.io/badge/-development-blue) |
| `two_factor_authenticator` | Sign in with two factor authenticator app. | ![Development](https://img.shields.io/badge/-development-blue) |
| `two_factor_recovery_code` | Sign in with two factory recovery code. | ![Development](https://img.shields.io/badge/-development-blue) |

---

`error.type` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

| Value  | Description | Stability |
|---|---|---|
| `_OTHER` | A fallback error value to be used when the instrumentation doesn't define a custom value. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

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### Metric: `aspnetcore.identity.sign_in.check_password_attempts`

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| Name     | Instrument Type | Unit (UCUM) | Description    | Stability | Entity Associations |
| -------- | --------------- | ----------- | -------------- | --------- | ------ |
| `aspnetcore.identity.sign_in.check_password_attempts` | Counter | `{attempt}` | The total number of check password attempts. Checks that the account is in a state that can log in and that the password is valid using the UserManager.CheckPasswordAsync method. [1] | ![Development](https://img.shields.io/badge/-development-blue) |  |

**[1]:** Meter name: `Microsoft.AspNetCore.Identity`; Added in: ASP.NET Core 10.0

| Attribute  | Type | Description  | Examples  | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability |
|---|---|---|---|---|---|
| [`aspnetcore.identity.user_type`](/docs/registry/attributes/aspnetcore.md) | string | The full name of the identity user type. | `Contoso.ContosoUser` | `Required` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`aspnetcore.identity.sign_in.result`](/docs/registry/attributes/aspnetcore.md) | string | Whether the sign in result was success or failure. | `password`; `two_factor` | `Conditionally Required` if no exception was thrown. | ![Development](https://img.shields.io/badge/-development-blue) |
| [`error.type`](/docs/registry/attributes/error.md) | string | The full name of exception type. | `System.OperationCanceledException` | `Conditionally Required` if and only if an error has occurred. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

---

`aspnetcore.identity.sign_in.result` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

| Value  | Description | Stability |
|---|---|---|
| `failure` | Sign in failed. | ![Development](https://img.shields.io/badge/-development-blue) |
| `locked_out` | User is locked out. | ![Development](https://img.shields.io/badge/-development-blue) |
| `not_allowed` | User is not allowed to sign in. | ![Development](https://img.shields.io/badge/-development-blue) |
| `requires_two_factor` | User requires two factory authentication to sign in. | ![Development](https://img.shields.io/badge/-development-blue) |
| `success` | Sign in was successful. | ![Development](https://img.shields.io/badge/-development-blue) |

---

`error.type` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

| Value  | Description | Stability |
|---|---|---|
| `_OTHER` | A fallback error value to be used when the instrumentation doesn't define a custom value. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

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<!-- endsemconv -->

### Metric: `aspnetcore.identity.sign_in.sign_ins`

<!-- semconv metric.aspnetcore.identity.sign_in.sign_ins -->
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| Name     | Instrument Type | Unit (UCUM) | Description    | Stability | Entity Associations |
| -------- | --------------- | ----------- | -------------- | --------- | ------ |
| `aspnetcore.identity.sign_in.sign_ins` | Counter | `{sign_in}` | The total number of calls to sign in user principals. [1] | ![Development](https://img.shields.io/badge/-development-blue) |  |

**[1]:** Meter name: `Microsoft.AspNetCore.Identity`; Added in: ASP.NET Core 10.0

| Attribute  | Type | Description  | Examples  | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability |
|---|---|---|---|---|---|
| [`aspnetcore.authentication.scheme`](/docs/registry/attributes/aspnetcore.md) | string | The identifier that names a particular authentication handler. | `Cookies`; `Bearer`; `Identity.Application` | `Required` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`aspnetcore.identity.user_type`](/docs/registry/attributes/aspnetcore.md) | string | The full name of the identity user type. | `Contoso.ContosoUser` | `Required` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`aspnetcore.sign_in.is_persistent`](/docs/registry/attributes/aspnetcore.md) | boolean | A flag indicating whether the sign in is persistent. |  | `Conditionally Required` if no exception was thrown. | ![Development](https://img.shields.io/badge/-development-blue) |
| [`error.type`](/docs/registry/attributes/error.md) | string | The full name of exception type. | `System.OperationCanceledException` | `Conditionally Required` if and only if an error has occurred. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

---

`error.type` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

| Value  | Description | Stability |
|---|---|---|
| `_OTHER` | A fallback error value to be used when the instrumentation doesn't define a custom value. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

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<!-- endsemconv -->

### Metric: `aspnetcore.identity.sign_in.sign_outs`

<!-- semconv metric.aspnetcore.identity.sign_in.sign_outs -->
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| Name     | Instrument Type | Unit (UCUM) | Description    | Stability | Entity Associations |
| -------- | --------------- | ----------- | -------------- | --------- | ------ |
| `aspnetcore.identity.sign_in.sign_outs` | Counter | `{sign_out}` | The total number of calls to sign out user principals. [1] | ![Development](https://img.shields.io/badge/-development-blue) |  |

**[1]:** Meter name: `Microsoft.AspNetCore.Identity`; Added in: ASP.NET Core 10.0

| Attribute  | Type | Description  | Examples  | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability |
|---|---|---|---|---|---|
| [`aspnetcore.authentication.scheme`](/docs/registry/attributes/aspnetcore.md) | string | The identifier that names a particular authentication handler. | `Cookies`; `Bearer`; `Identity.Application` | `Required` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`aspnetcore.identity.user_type`](/docs/registry/attributes/aspnetcore.md) | string | The full name of the identity user type. | `Contoso.ContosoUser` | `Required` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`error.type`](/docs/registry/attributes/error.md) | string | The full name of exception type. | `System.OperationCanceledException` | `Conditionally Required` if and only if an error has occurred. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

---

`error.type` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

| Value  | Description | Stability |
|---|---|---|
| `_OTHER` | A fallback error value to be used when the instrumentation doesn't define a custom value. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

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<!-- endsemconv -->

### Metric: `aspnetcore.identity.sign_in.two_factor_clients_remembered`

<!-- semconv metric.aspnetcore.identity.sign_in.two_factor_clients_remembered -->
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| Name     | Instrument Type | Unit (UCUM) | Description    | Stability | Entity Associations |
| -------- | --------------- | ----------- | -------------- | --------- | ------ |
| `aspnetcore.identity.sign_in.two_factor_clients_remembered` | Counter | `{client}` | The total number of two factor clients remembered. [1] | ![Development](https://img.shields.io/badge/-development-blue) |  |

**[1]:** Meter name: `Microsoft.AspNetCore.Identity`; Added in: ASP.NET Core 10.0

| Attribute  | Type | Description  | Examples  | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability |
|---|---|---|---|---|---|
| [`aspnetcore.authentication.scheme`](/docs/registry/attributes/aspnetcore.md) | string | The identifier that names a particular authentication handler. | `Cookies`; `Bearer`; `Identity.Application` | `Required` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`aspnetcore.identity.user_type`](/docs/registry/attributes/aspnetcore.md) | string | The full name of the identity user type. | `Contoso.ContosoUser` | `Required` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`error.type`](/docs/registry/attributes/error.md) | string | The full name of exception type. | `System.OperationCanceledException` | `Conditionally Required` if and only if an error has occurred. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

---

`error.type` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

| Value  | Description | Stability |
|---|---|---|
| `_OTHER` | A fallback error value to be used when the instrumentation doesn't define a custom value. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

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### Metric: `aspnetcore.identity.sign_in.two_factor_clients_forgotten`

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| Name     | Instrument Type | Unit (UCUM) | Description    | Stability | Entity Associations |
| -------- | --------------- | ----------- | -------------- | --------- | ------ |
| `aspnetcore.identity.sign_in.two_factor_clients_forgotten` | Counter | `{client}` | The total number of two factor clients forgotten. [1] | ![Development](https://img.shields.io/badge/-development-blue) |  |

**[1]:** Meter name: `Microsoft.AspNetCore.Identity`; Added in: ASP.NET Core 10.0

| Attribute  | Type | Description  | Examples  | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability |
|---|---|---|---|---|---|
| [`aspnetcore.authentication.scheme`](/docs/registry/attributes/aspnetcore.md) | string | The identifier that names a particular authentication handler. | `Cookies`; `Bearer`; `Identity.Application` | `Required` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`aspnetcore.identity.user_type`](/docs/registry/attributes/aspnetcore.md) | string | The full name of the identity user type. | `Contoso.ContosoUser` | `Required` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`error.type`](/docs/registry/attributes/error.md) | string | The full name of exception type. | `System.OperationCanceledException` | `Conditionally Required` if and only if an error has occurred. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

---

`error.type` has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

| Value  | Description | Stability |
|---|---|---|
| `_OTHER` | A fallback error value to be used when the instrumentation doesn't define a custom value. | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |

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[DocumentStatus]: https://opentelemetry.io/docs/specs/otel/document-status