Logfire

Logfire is an observability platform that shows you what your application is actually doing: every request, database query, LLM call, and error, with how long each one took, in your browser. It is built on OpenTelemetry (OTel), the open industry standard for collecting traces, metrics, and logs, and works across your whole stack, from traditional backends to AI agents. Read why Logfire exists.

New here? Create a free account, then pick a starting point below.

Quickstarts

• Send your first trace

  Install the SDK and watch a trace arrive in the Live view, in about 5 minutes.

• Trace your AI and LLM calls

  See the spans, tokens, cost, and tool calls behind your model-powered features.

• Let an AI coding agent set it up

  Paste one prompt into Claude Code, Cursor, or a similar tool and let it wire up Logfire for you.

Explore

• Live view

  Watch traces stream in and drill into any span to read its full detail.

• Integrations

  FastAPI, Django, SQLAlchemy, HTTPX, and 40+ more, each with one line of setup.

• Dashboards and alerts

  Build charts over your data and get notified in Slack when something changes.

• Choose your path

  A short, ordered route through the docs for your role.

New to observability?

Core concepts explains spans, traces, and logs, and how to read them in Logfire.