# integration-opentelemetry (OpenTelemetry Tracing) Examples for using OpenTelemetry tracing with promptfoo. ## Examples - [javascript](./javascript/) - Custom JS provider with OTEL tracing (JSON format) - [python](./python/) - Custom Python provider with OTEL tracing (protobuf format) - [built-in](./built-in/) - Built-in OTEL tracing with standard providers (OpenAI, Anthropic, Azure)