Pydantic Logfire
Pydantic Logfire is an observability platform for AI and general applications, enabling teams to monitor LLM interactions, agent behavior, API requests, and database queries in one unified trace. It offers distributed tracing, token usage analysis, and cost tracking, with SDKs for Python, JavaScript, and Rust. Designed for engineering teams building with LLMs and agents.
Overview
12 featuresPydantic Logfire is a LLM & agent tracing project. It focuses on monitoring and debugging AI and general applications by providing deep observability into LLMs, agents, and APIs. Pydantic Logfire is a B2B product aimed at AI engineers and developers. A free plan is available; paid tiers begin at $29. It runs on the web, the command line, and API.
Behind Pydantic Logfire is Pydantic AI, and it first shipped in 2023. The project is developed in the open on GitHub with 4.3k stars and 134 commits in the last 90 days. Among its 12 catalogued features are distributed tracing, token usage analysis, and cost tracking. It exposes integrations via an MCP server and a public API.
Summary written by a language model from the project’s public pages.
- Distributed tracing
- Token usage analysis
- Cost tracking
- Agent monitoring
- OpenTelemetry integration
- Python SDK
- JavaScript SDK
- Rust SDK
- Prompt lifecycle tracing
- Groundedness metrics
- Toxicity metrics
- Unified trace view
Built with & integrations
- Next.js
- /_next/static/ in the HTML · __next_f in the HTML
- openai
- bgpt- in the HTML
- multiple
- bLangChain in the HTML · bLlamaIndex in the HTML
- Cloudflare
- cf-ray header · cf-cache-status header
Trust & compliance
Indexing history
1What PulseGate has recorded for this listing
Frequently asked questions about Pydantic Logfire
- What is Pydantic Logfire?
- Pydantic Logfire focuses on monitoring and debugging AI and general applications by providing deep observability into LLMs, agents, and APIs. It is catalogued under LLM & agent tracing on PulseGate.
- Who is Pydantic Logfire for?
- Pydantic Logfire is a B2B product built for AI engineers and developers.
- How much does Pydantic Logfire cost?
- Paid plans start at $29, and a free tier is available.
- What platforms does Pydantic Logfire run on?
- Pydantic Logfire runs on the web, the command line, and API.
- Is Pydantic Logfire still maintained?
- The GitHub repository shows 134 commits in the last 90 days.
- Who develops Pydantic Logfire?
- Pydantic Logfire is developed by Pydantic AI.
- When did Pydantic Logfire launch?
- Pydantic Logfire first shipped in 2023.
- Does Pydantic Logfire have an API or integrations?
- Yes — Pydantic Logfire exposes an MCP server and a public API.
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