langfuse.com
Langfuse is an open-source AI engineering platform for observing, evaluating, and managing LLM applications, prompts, traces, and related data. It is available as a hosted cloud service with multiple regions and as a self-hosted deployment.
Langfuse exposes a Basic-authenticated REST Public API (OpenAPI published), an authenticated MCP server for project data, a public docs MCP server, and an npm-distributed CLI that wraps the API.
- Langfuse MCP Serverdiscovered
- Langfuse Docs MCP Serverdiscovered
- Langfuse Public APIdiscovered
- Langfuse CLIdiscovered
In the Langfuse UI, open your project's settings and create or copy the API keys under Project settings → API Keys. Langfuse issues a public key and a secret key, used together as HTTP Basic Auth username/password or exported for the CLI as LANGFUSE_PUBLIC_KEY and LANGFUSE_SECRET_KEY. See Public API and CLI.
Create an organization-scoped API key in Organization Settings in the Langfuse UI. On self-hosted enterprise deployments, organization-scoped keys can also be created via the Instance Management API. Use the public key as the HTTP Basic Auth username and the secret key as the password. See SCIM & Organization-Key Scoped API Routes.
conventions · 2/7 published
- integrations.json——
- llms.txt✓https://langfuse.com/llms.txt
- API catalog✗
/.well-known/api-catalog - OpenAPI document✗
/api/schema/, /openapi.json, /swagger.json, /api/openapi.json, or /v1/openapi.json - MCP server card✗
/.well-known/mcp/server-card.json - OAuth protected resource✗
/.well-known/oauth-protected-resource - Agent card✗
/.well-known/agent-card.json - Agent skills✓https://langfuse.com/.well-known/agent-skills/index.json
Publish these signals → /publishing