Langfuse MCP Server - install, status & alternatives [2026]

01 · Install Langfuse

before you install - you'll need

Set LANGFUSE_SECRET_KEY, LANGFUSE_PUBLIC_KEY, LANGFUSE_BASE_URL before connecting.

Claude Code

claude mcp add pulsemcp-mcp-servers-experimental-langfu -- npx -y langfuse-observability-mcp-server

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "pulsemcp-mcp-servers-experimental-langfu": {
      "command": "npx",
      "args": [
        "-y",
        "langfuse-observability-mcp-server"
      ]
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions

license MIT - declared in the repository

npm package langfuse-observability-mcp-server - unscoped; check the name against the project README before installing

registry vendor namespace com.pulsemcp - domain-verified with the official MCP registry

03 · What Langfuse can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

What you can build

With this server connected, an agent can list traces with filtering and pagination. Returns minimal summary (no I/O fields), get full trace by ID including observations, scores, input/output, and metadata, list observations with filtering by traceId, type, level, etc. Returns minimal summary, and get full observation by ID including input, output, model parameters, usage, and cost details.

The 4 tools it gives your agent

Extracted from the project's README - what langfuse lets an agent do.

get_traces: - List traces with filtering and pagination. Returns minimal summary (no I/O fields).
get_trace_detail: - Get full trace by ID including observations, scores, input/output, and metadata.
get_observations: - List observations with filtering by traceId, type, level, etc. Returns minimal summary.
get_observation: - Get full observation by ID including input, output, model parameters, usage, and cost details.

Latest releases

[email protected] · 2026-07-10

Fixed · Gmail deep-links emitted by list_email_conversations, search_email_conversations, get_email_conversation, and send_email now use the form instead of Two independent defects made the old links fail to open the…

[email protected] · 2026-07-09

Added · create_oauth_client tool (keys group, write): mints a non-interactive Tailscale OAuth client (client_id + client_secret) with configurable scopes and ACL tags. Unlike create_auth_key - which only enrolls…

[email protected] · 2026-07-06

Added · set_account_balance_history (manage group): edit a manual account's recorded daily balance snapshots. Previously the server could read balance history (get_account_balance_history) but had no write counterpart…

04 · Who maintains Langfuse

langfuse is maintained by pulsemcp. We track 29 MCP servers from pulsemcp - 28 actively maintained, 77 combined GitHub stars, oldest repo from May 2025. Full record: all servers from pulsemcp.

05 · Facts

repository: github.com/pulsemcp/mcp-servers
category: DevOps & monitoring - actively maintained as of 2026-08-25.
registry: com.pulsemcp/langfuse (active, first published 2026-05-18 · 2 versions)
packages: npm:langfuse-observability-mcp-server

06 · Langfuse FAQ

Is Langfuse still maintained?

Yes - as of 2026-08-25, its last commit was 2026-07-26. We re-verify nightly.

What can Langfuse do?

With this server connected, an agent can list traces with filtering and pagination. Returns minimal summary (no I/O fields), get full trace by ID including observations, scores, input/output, and metadata, list observations with filtering by traceId, type, level, etc. Returns minimal summary, and get full observation by ID including input, output, model parameters, usage, and cost details.

How do I install Langfuse?

Run `npx -y langfuse-observability-mcp-server`. The README documents 3 environment variables (LANGFUSE_SECRET_KEY, LANGFUSE_PUBLIC_KEY, LANGFUSE_BASE_URL) to set first. Set LANGFUSE_SECRET_KEY, LANGFUSE_PUBLIC_KEY, LANGFUSE_BASE_URL before connecting. You can also paste the ready-made client config above.

Does Langfuse run locally?

Yes - it's a stdio server: it runs on your machine (via npx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

07 · Alternatives to Langfuse

Alternatives to Langfuse

Maintained DevOps & monitoring servers if Langfuse isn't the fit.

Pairs well with

Servers that cover what Langfuse doesn't - only shown when the pairing reason fits the companion.

More DevOps & monitoring MCP servers · Adif MCP · N3mo · Scherlok · Guardian · SandBase Harness

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