LibreChat

LibreChat is an open-source AI chat platform that brings together multiple AI providers behind a single interface. Muster (langfuse) tracing is built in — three env vars and a restart.

Setup

1. Get Muster API keys

Sign up at your Muster instance and copy the public/secret keys.

2. Add env vars to LibreChat's .env

LANGFUSE_PUBLIC_KEY=pk-lf-***
LANGFUSE_SECRET_KEY=sk-lf-***
LANGFUSE_BASE_URL=https://app.getmuster.io

3. Restart LibreChat

Apply the configuration change. Every chat message now generates a trace in Muster.

See also

• Upstream Langfuse LibreChat docs
• Agentic Data Stack
• LobeChat