Schema | Langfuse MCP Server

Langfuse MCP Server

Describes the environment variables required to run the server.

Name	Required	Description	Default
`LANGFUSE_HOST`	No	Your Langfuse instance URL	https://cloud.langfuse.com
`LANGFUSE_PUBLIC_KEY`	No	Your Langfuse public key
`LANGFUSE_SECRET_KEY`	No	Your Langfuse secret key
`LANGFUSE_MCP_PROFILE`	No	Profile to load from the profiles file; same as --profile.
`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 — e.g. 30 if your retention is 30 days.	7
`LANGFUSE_MCP_READ_ONLY`	No	Disable all write operations for safer read-only access. Set to 'true' to enable.
`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	Set 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). Raise it if large traces with include_observations=True time out. Must be a positive integer.	120

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.

Server capabilities have not been inspected yet.

Functions exposed to the LLM to take actions

Name	Description
No tools

Interactive templates invoked by user choice

Name	Description
No prompts

Contextual data attached and managed by the client

Name	Description
No resources

This server cannot be deployed

ActivityActive

ResponsivenessNo issues