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[1.16] Adds not about new SA headers 

Adds docs on Service Invocation app ID & namespace headers.

Fixes https://github.com/dapr/docs/issues/4816

Signed-off-by: joshvanl <me@joshvanl.dev>
This commit is contained in:
joshvanl 2025-08-22 17:56:31 -03:00
parent aa764cf8c7
commit 5459c96033
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daprdocs/content/en/reference/api/service_invocation_api.md
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@ -134,6 +134,17 @@ In case you are invoking `mathService` on a different namespace, you can use the
In this URL, `testing` is the namespace that `mathService` is running in.
### Headers in Service Invocation Requests
When Dapr invokes a service, it automatically adds the following headers to the request:
| Header | Description | Example |
|--------|-------------|---------|
| `dapr-app-id` | The ID of the calling application | `myapp` |
| `dapr-caller-namespace` | The namespace of the calling application | `production` |
These headers are available in both HTTP and gRPC service invocation requests.
#### Non-Dapr Endpoint Example
If the `mathService` service was a non-Dapr application, then it could be invoked using service invocation via an `HTTPEndpoint`, as well as a Fully Qualified Domain Name (FQDN) URL.