Logfire

Pydantic Logfire is an observability platform built on OpenTelemetry. It collects the traces, logs, and metrics your services emit, stores every span in a queryable records table, and exposes that table through a read-only SQL API.

With Logfire, you can:

• Search spans and logs: Filter by message text, service, span name, severity, deployment environment, and whether an exception was recorded — no SQL required.
• Run SQL directly: Query the records and metrics tables with PostgreSQL-compatible syntax for aggregations like error rates and latency percentiles.
• Reconstruct a request: Pull every span in a trace, ordered earliest to latest, and walk the parent-child tree to see where time went and where it failed.
• Confirm a credential: Resolve which organization and project a read token targets before querying it.

Sim's Logfire integration lets agents read production telemetry as part of a run. Use it to triage errors against a live service, attach a root-cause summary to an incident ticket, or watch latency between deploys and page when it regresses.

Authentication uses a Logfire read token, which you create per project under Settings → Read tokens. The region is detected from the token's prefix, so Cloud users on US and EU need no extra configuration. Self-hosted instances set the Host field to their own base URL, which must be reachable over HTTPS at a publicly resolvable domain.

Usage Instructions

Integrate Pydantic Logfire into workflows. Run SQL over your observability data, search spans and logs with structured filters, pull an entire trace by ID, and confirm which project a read token targets.

Actions

logfire_query

Run a read-only SQL query against Logfire traces, logs, and metrics. Reads the records and metrics tables using PostgreSQL-compatible syntax.

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logfire_search_records

Search Logfire spans and logs using structured filters for message text, service, span name, severity, environment, and exceptions. Returns the most recent matches first without writing SQL.

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Output

logfire_get_trace

Fetch every span and log belonging to a Logfire trace, ordered from earliest to latest, so a single request can be reconstructed end to end.

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logfire_get_token_info

Resolve which Logfire organization and project a read token belongs to. Useful for confirming a credential targets the expected project before querying it.

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Output