docs/daprdocs/content/en/reference/environment/_index.md

type	title	linkTitle	description	weight
docs	Environment variable reference	Environment variables	A list of environment variables used by Dapr	300

The following table lists the environment variables used by the Dapr runtime, CLI, or from within your application:

Environment Variable	Used By	Description
APP_ID	Your application	The id for your application, used for service discovery
APP_PORT	Your application	The port your application is listening on
APP_API_TOKEN	Your application	The token used by the application to authenticate requests from Dapr API. Read [authenticate requests from Dapr using token authentication]({{< ref app-api-token >}}) for more information.
DAPR_HTTP_PORT	Your application	The HTTP port that the Dapr sidecar is listening on. Your application should use this variable to connect to Dapr sidecar instead of hardcoding the port value. Set by the Dapr CLI run command for self-hosted or injected by the dapr-sidecar-injector into all the containers in the pod.
DAPR_GRPC_PORT	Your application	The gRPC port that the Dapr sidecar is listening on. Your application should use this variable to connect to Dapr sidecar instead of hardcoding the port value. Set by the Dapr CLI run command for self-hosted or injected by the dapr-sidecar-injector into all the containers in the pod.
DAPR_METRICS_PORT	Your application	The HTTP [Prometheus]({{< ref prometheus >}}) port to which Dapr sends its metrics information. With this variable, your application sends its application-specific metrics to have both Dapr metrics and application metrics together. See [metrics-port]({{< ref arguments-annotations-overview>}}) for more information
DAPR_PROFILE_PORT	Your application	The [profiling port]({{< ref profiling-debugging >}}) through which Dapr lets you enable profiling and track possible CPU/memory/resource spikes in your application's behavior. Enabled by --enable-profiling command in Dapr CLI for self-hosted or dapr.io/enable-profiling annotation in Dapr annotated pod.
DAPR_API_TOKEN	Dapr sidecar	The token used for Dapr API authentication for requests from the application. [Enable API token authentication in Dapr]({{< ref api-token >}}).
NAMESPACE	Dapr sidecar	Used to specify a component's [namespace in self-hosted mode]({{< ref component-scopes >}}).
DAPR_DEFAULT_IMAGE_REGISTRY	Dapr CLI	In self-hosted mode, it is used to specify the default container registry to pull images from. When its value is set to GHCR or ghcr, it pulls the required images from Github container registry. To default to Docker hub, unset this environment variable.
SSL_CERT_DIR	Dapr sidecar	Specifies the location where the public certificates for all the trusted certificate authorities (CA) are located. Not applicable when the sidecar is running as a process in self-hosted mode.
DAPR_HELM_REPO_URL	Your private Dapr Helm chart url	Specifies a private Dapr Helm chart url, which defaults to the official Helm chart URL: https://dapr.github.io/helm-charts
DAPR_HELM_REPO_USERNAME	A username for a private Helm chart	The username required to access the private Dapr Helm chart. If it can be accessed publicly, this env variable does not need to be set
DAPR_HELM_REPO_PASSWORD	A password for a private Helm chart	The password required to access the private Dapr helm chart. If it can be accessed publicly, this env variable does not need to be set
OTEL_EXPORTER_OTLP_ENDPOINT	OpenTelemetry Tracing	Sets the Open Telemetry (OTEL) server address, turns on tracing. (Example: http://localhost:4318)
OTEL_EXPORTER_OTLP_INSECURE	OpenTelemetry Tracing	Sets the connection to the endpoint as unencrypted. (true, false)
OTEL_EXPORTER_OTLP_PROTOCOL	OpenTelemetry Tracing	The OTLP protocol to use Transport protocol. (grpc, http/protobuf, http/json)