Langfuse
Open source LLM engineering platform. Traces, evals, prompt management and metrics to debug and improve your LLM application.
Integration
- Vendor
- Langfuse
- Category
- developer-tools
- Auth
- API_KEY
- Tools
- 13
- Composio slug
langfuse
Tools
- Create Score
Attach an evaluation score to exactly one Langfuse trace, session, or dataset run, optionally narrowing a trace score to an observation.
- Get Annotation Queue
Retrieve one Langfuse annotation queue by its ID.
- Get Prompt
Retrieve a Langfuse text or chat prompt by name, deployment label, or exact version, with optional dependency resolution.
- List Annotation Queues
List annotation queues configured for human evaluation in the connected Langfuse project.
- List Dataset Items
List dataset items, optionally scoped to a dataset, source trace or observation, or historical dataset version.
- List Dataset Run Items
List run items for a specific Langfuse dataset and run name.
- List Datasets
List datasets available to the connected Langfuse project.
- List Experiments
List Langfuse experiments active in a required time range, optionally including metadata and directly attached scores.
- List Models
List Langfuse-managed and project-custom model pricing definitions used for usage and cost calculation.
- List Observations
Search Langfuse observations such as generations, spans, events, agents, and tool calls, selecting only the field groups needed.
- List Scores
Search numeric, boolean, categorical, text, and correction scores with subject and annotation context.
- Query Metrics
Run an aggregate Langfuse metrics query over observations or numeric, boolean, or categorical scores.
- Upsert LLM Connection
Create or update a Langfuse LLM provider connection by provider name.
Setup
- Create or open a Switchy Project.
- Open Integrations and connect Langfuse.
- Authorise through api_key. Switchy stores the connection against your org.
- Everyone in the Project can now @-mention the Langfuse tools in chat.
What teammates see: by default, memories from Langfuse are scoped to the Project (PROJECT visibility) - you can mark any memory PRIVATE or share it ORG-wide.
Works well with
Top models
Compatibility data appears once enough Projects have used this MCP together with a given model.