Langfuse v4: up to 165× faster · Read more
FaqAll FAQs
FaqAll FAQs

All FAQs

Administration

I cannot see my organization in Langfuse

I want to delete / cancel / close my Langfuse account

How do I enforce 2FA for all users?

I have forgotten my password

Inviting co-workers to Langfuse

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Article

Monitoring AI Research Assistants - Ensuring Accuracy and Reliability

What are the common challenges of building LLM applications?

Chatbot Analytics: Monitor, Evaluate & Improve Your AI Chatbot

LLM Analytics 101 — How to Measure and Improve Your LLM Application

What is LLM Observability & Monitoring?

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Auth

I want to delete / cancel / close my Langfuse account

I have forgotten my password

Inviting co-workers to Langfuse

Where is my Langfuse project?

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Cloud

I cannot see my organization in Langfuse

How do I cut my Langfuse Cloud bill?

How to manage different environments in Langfuse?

How do I upgrade my Langfuse account?

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Evaluation

How do I work with the observations table in Langfuse v4?

How to use Langfuse-hosted Evaluators on Dataset Runs?

How do I upgrade trace-level evaluators to observation-level evaluators?

How to create and manage Score Configs in Langfuse?

I have setup Langfuse, but I do not see any traces in the dashboard. How to solve this?

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Evaluation Get Started

Why is my observation-level evaluator not executing?

What are scores in Langfuse and when should I use them?

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Experiments

Why are my experiment runs not visible after upgrading to Langfuse v4?

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Integration

I changed my blob storage config — why didn't it re-export, and why do I still see an error?

Why do I see empty files in my blob storage export?

How do blob storage export timing and retries work?

How to customize the names of observations within a Langchain trace?

How to integrate Langfuse with an existing OpenTelemetry setup

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Observability

How to use Langfuse Tracing in Serverless Functions (AWS Lambda, Vercel, Cloudflare Workers, etc.)

How do I track LLM cost and tokens in Langfuse?

Why are trace input and output empty?

How to enable or disable Langfuse tracing?

How to integrate Langfuse with an existing OpenTelemetry setup

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Observability Get Started

Why are trace input and output empty?

I have setup Langfuse, but I do not see any traces in the dashboard. How to solve this?

Why do I see HTTP requests or database queries in my Langfuse traces?

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Platform

Why do I see 524 errors on Langfuse API calls?

Are there any limits to the Langfuse API?

I changed my blob storage config — why didn't it re-export, and why do I still see an error?

Why do I see empty files in my blob storage export?

How do blob storage export timing and retries work?

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Product

19 Questions about Langfuse Answered

Which packages and projects are using Langfuse?

How can I self-host Langfuse?

Ten Reasons to Use Langfuse for LLM Observability, Evaluations and Prompt Management

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Prompt Management

Can I dynamically select sub-prompts at runtime?

How to configure retries and timeouts when fetching prompts?

How to measure prompt performance?

Link prompt management with tracing in Langfuse

Can I manage agent skills with Langfuse Prompt Management?

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Prompt Management Get Started

I'm not seeing the latest version of my prompt. Why?

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Public API

Why do I see 524 errors on Langfuse API calls?

Are there any limits to the Langfuse API?

How do I migrate off the deprecated Langfuse APIs?

Where can I find the API reference for self-hosted Langfuse?

Where do I find my Langfuse API keys?

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Sdk

Why are my experiment runs not visible after upgrading to Langfuse v4?

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Self Hosting

Are prebuilt ARM images available?

Are older versions of the SDK compatible with newer versions of Langfuse?

Why is my data retention job running into timeouts?

I cannot connect to my docker deployment, what should I do?

I have forgotten my password

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Tracing

How do I work with the observations table in Langfuse v4?

How long does it take for traces to appear in Langfuse?

Why do observation lookups with the v3 SDK return 404?

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V4

Why are my experiment runs not visible after upgrading to Langfuse v4?

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Other

Dashboard changes in Langfuse v4

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