Langfuse

About

See exactly what your agents did and why

Langfuse captures traces through its SDKs and OpenTelemetry and integrates with the OpenAI SDK, LangChain and the Vercel AI SDK. On top of traces you can run evaluations, annotate outputs and manage prompts. The core is MIT-licensed and self-hostable with Docker Compose, and the cloud exposes a native MCP endpoint for querying your data from an agent.

Features

• Tracing via SDKs and OpenTelemetry
• Evals, scores and annotation queues
• Prompt management and datasets
• Self-host free or use Langfuse Cloud

Install

• Claude Code$claude mcp add --transport http langfuse https://cloud.langfuse.com/api/public/mcp
• Codex$codex mcp add langfuse --url https://cloud.langfuse.com/api/public/mcp
• Cursor$npx -y mcp-remote https://cloud.langfuse.com/api/public/mcp
• Grok Bot$grokbot mcp add langfuse https://cloud.langfuse.com/api/public/mcp