# SDK Configuration

OpenTelemetry SDKs support configuration in each language and with environment
variables. The following pages describe the environment variables you can use to
configure your SDK.

> [!NOTE]
>
> Support for environment-variable configuration varies across languages. For
> the list of variables supported by each language, see the [environment
> variable compliance matrix][env-var-matrix].

[env-var-matrix]:
  https://github.com/open-telemetry/opentelemetry-specification/blob/main/spec-compliance-matrix.md#environment-variables
{{__hugo_ctx/}}

---

Section pages:

- [General SDK Configuration](/docs/languages/sdk-configuration/general/)
- [OTLP Exporter Configuration](/docs/languages/sdk-configuration/otlp-exporter/)
- [Declarative configuration](/docs/languages/sdk-configuration/declarative-configuration/)