Langfuse MCP Server
by ericortiz604
Server Configuration
Describes the environment variables required to run the server.
| Name | Required | Description | Default |
|---|---|---|---|
| LANGFUSE_HOST | No | URL of the Langfuse instance. Use your instance URL if self-hosted. | https://cloud.langfuse.com |
| LANGFUSE_PUBLIC_KEY | No | Langfuse public API key (e.g. pk-lf-...), taken from Langfuse Cloud → Settings → API Keys. | |
| LANGFUSE_SECRET_KEY | No | Langfuse secret API key (e.g. sk-lf-...), taken from Langfuse Cloud → Settings → API Keys. | |
| LANGFUSE_MCP_PROFILE | No | Profile to load from the profiles file; same as --profile. Used to configure credentials per project from the profiles TOML file instead of environment variables. | |
| LANGFUSE_MAX_AGE_DAYS | No | Caps the lookback window for time-based tools (fetch_traces, fetch_observations, etc.). Set to match your Langfuse instance's data retention. | 7 |
| LANGFUSE_MCP_READ_ONLY | No | Disable all write operations for safer read-only access; same as --read-only. | false |
| LANGFUSE_MCP_PROFILES_FILE | No | Path of the profiles file; same as --profiles-file. | $XDG_CONFIG_HOME/langfuse-mcp/profiles.toml |
| LANGFUSE_MCP_DEFAULT_OUTPUT_MODE | No | Sets the MCP-exposed default output_mode so clients that omit the parameter automatically use your preferred mode. Supported values: compact, full_json_string, full_json_file. | |
| LANGFUSE_MCP_TRACE_TIMEOUT_SECONDS | No | Per-request read timeout (seconds) for single-trace fetches (fetch_trace). Must be a positive integer. | 120 |
Instructions
Guidance the server publishes about itself, which clients place ahead of the tool catalog so the model reads it before choosing anything.
This server publishes no instructions, or was last inspected before Glama recorded them.
Capabilities
Server capabilities have not been inspected yet.
Tools
Functions exposed to the LLM to take actions
| Name | Description |
|---|---|
No tools | |
Prompts
Interactive templates invoked by user choice
| Name | Description |
|---|---|
No prompts | |
Resources
Contextual data attached and managed by the client
| Name | Description |
|---|---|
No resources | |
This server cannot be deployed
Maintenance
ActivityMaintained
ResponsivenessNo issues