MCP server that fetches Langfuse traces and provides them as context to VS Code coding agents.
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# Langfuse Trace Fetcher — MCP Server for VS Code > **Version 0.1.0** · Fetch Langfuse observability traces directly into your coding agent's context. ## What It Does This is a [Model Context Protocol (MCP)](https://modelcontextprotocol.io/) server that connects your VS Code coding agent (Gemini Code Assist) to a [Langfuse](https://langfuse.com) instance. It exposes three tools: | Tool | Description | |------|-------------| | `fetch_langfuse_traces` | Fetch a filtered, paginated list of traces | | `get_langfuse_trace_detail` | Fetch full detail for a single trace (including observations, scores) | | `list_langfuse_trace_filters` | Show available filter fields and usage examples | ## Installation ### From PyPI (Recommended) ```bash pip install langfuse-traces-mcp ``` ### From Source ```bash # Clone the repository git clone https://github.com/yourusername/langfuse-traces-mcp.git cd langfuse-traces-mcp # Install in development mode (includes test dependencies) pip install -e ".[dev]" ``` ## Prerequisites - **Python 3.10+** - **VS Code** with Gemini Code Assist extension (Agent Mode enabled) - **Langfuse instance** — cloud ([cloud.langfuse.com](https://cloud.langfuse.com)) or self-hosted ## VS Code Setup 1. Install the package: `pip install langfuse-traces-mcp` 2. Add the MCP server configuration to your VS Code settings. Open VS Code settings (Ctrl/Cmd + ,) and search for "Gemini Code Assist". In the settings JSON, add: ```json { "mcpServers": { "langfuse-traces": { "command": "langfuse-traces-mcp" } } } ``` 3. **Reload VS Code** after configuration. 4. Open Gemini Code Assist chat and **toggle Agent Mode ON**. 5. The `langfuse-traces` tools should now be available. ## Usage Once configured, you can ask your coding agent questions like: - "Show me traces from production in the last hour" - "Get details for trace ID abc-123-xyz" - "List traces with errors tagged as 'critical'" - "Show me traces from user 'john.doe' in the staging e…
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