Troubleshooting and FAQ
This page addresses frequently asked questions and common troubleshooting topics for Langfuse Observability.
If you don't find a solution to your issue here, try using Ask AI for instant answers. For bug reports, please open a ticket on GitHub Issues. For general questions or support, visit our support page.
FAQ
- How do I track LLM cost and tokens in Langfuse?
- How do I work with observations in Langfuse Fast Preview (Langfuse v4)?
- How to enable or disable Langfuse tracing?
- How to evaluate sessions/conversations?
- How to integrate Langfuse with an existing OpenTelemetry setup
- How to integrate Langfuse with an existing Sentry setup
- How to manage different environments in Langfuse?
- How to update traces, observations, and scores?
- How to use Langfuse Tracing in Serverless Functions (AWS Lambda, Vercel, Cloudflare Workers, etc.)
- I have setup Langfuse, but I do not see any traces in the dashboard. How to solve this?
- Link prompt management with tracing in Langfuse
- What does a good trace look like?
- Where do I find my Langfuse API keys?
- Which packages and projects are using Langfuse?
- Why are the input and output of a trace empty?
- Why do I see HTTP requests or database queries in my Langfuse traces?
- Why do observation lookups with the v3 SDK return 404?
GitHub Discussions
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