Logfire
JSON →Observability platform from Pydantic — structured logging, tracing, and metrics built on OpenTelemetry. Current version is 4.30.0. Must call logfire.configure() before any instrumentation or spans. Requires LOGFIRE_TOKEN env var for cloud backend. The old pydantic-logfire package is a deprecated stub — use logfire directly. Pricing changed January 2026.
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Resources
packagepypi.org/project/logfire/ ↗
API endpoints
full doc /v1/registry/logfire
install /v1/registry/logfire/install
compatibility /v1/registry/logfire/compatibility