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Langfuse

@avivsinai · github.com/avivsinai/langfuse-mcp

Query Langfuse traces, debug exceptions, analyze sessions, and manage prompts. Full observability toolkit for LLM applications.

ClaimedAI & MLstdiolocal auth
GitHub

Install one command

terminal
$ npx skills add avivsinai/langfuse-mcp -g -y

Or add it with the Claude CLI: claude mcp add avivsinai-langfuse-mcp

Tools exposed 20 tools

fetch_traces
fetch_trace
fetch_observations
fetch_observation
find_route_decisions
get_route_decision
summarize_route_decisions
fetch_sessions
get_session_details
get_user_sessions
find_exceptions
find_exceptions_in_file
get_exception_details
get_error_count
list_prompts
get_prompt
get_prompt_unresolved
create_text_prompt
create_chat_prompt
update_prompt_labels

Configuration claude_desktop_config.json

claude_desktop_config.json
{
  "mcpServers": {
    "avivsinai-langfuse-mcp": {
      "command": "npx",
      "args": ["skills", "add", "avivsinai/langfuse-mcp", "-g", "-y"],
      "env": {
        "LANGFUSE_HOST": "<your-langfuse-host>",
        "LANGFUSE_SECRET_KEY": "<your-langfuse-secret-key>",
        "LANGFUSE_PUBLIC_KEY": "<your-langfuse-public-key>"
      }
    }
  }
}

Paste under mcpServers in your config, then restart Claude Desktop. For Claude Code, reference this server in your project's CLAUDE.md.

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