mcp

# PostHog MCP ## Use the MCP Server ### Quick install You can install the MCP server automatically into popular clients by running the following command: ``` npx @posthog/wizard@latest mcp add ``` ### Manual install 1. Obtain a personal API key using the MCP Server preset [here](https://app.posthog.com/settings/user-api-keys?preset=mcp_server). 2. Add the MCP configuration to your desktop client (e.g. Cursor, Windsurf, Claude Desktop) and add your personal API key ```json { "mcpServers": { "posthog": { "command": "npx", "args": [ "-y", "mcp-remote@latest", "https://mcp.posthog.com/sse", "--header", "Authorization:${POSTHOG_AUTH_HEADER}" ], "env": { "POSTHOG_AUTH_HEADER": "Bearer {INSERT_YOUR_PERSONAL_API_KEY_HERE}" } } } } ``` **Here are some examples of prompts you can use:** - What feature flags do I have active? - Add a new feature flag for our homepage redesign - What are my most common errors? # Development To run the MCP server locally, run the following command: ``` pnpm run dev ``` And replace `https://mcp.posthog.com/sse` with `http://localhost:8787/sse` in the MCP configuration. ### Environment variables - Create `.dev.vars` in the root - Add Inkeep API key to enable `docs-search` tool (see `Inkeep API key - mcp`) ``` INKEEP_API_KEY="..." ``` ### Configuring the Model Context Protocol Inspector During development you can directly inspect the MCP tool call results using the [MCP Inspector](https://modelcontextprotocol.io/docs/tools/inspector). You can run it using the following command: ```bash npx @modelcontextprotocol/inspector npx -y mcp-remote@latest http://localhost:8787/sse --header "\"Authorization: Bearer {INSERT_YOUR_PERSONAL_API_KEY_HERE}\"" ``` Alternatively, you can use the following configuration in the MCP Inspector: Use transport type `STDIO`. **Command:** ``` npx ``` **Arguments:** ``` -y mcp-remote@latest http://localhost:8787/sse --header "Authorization: Bearer {INSERT_YOUR_PERSONAL_API_KEY_HERE}" ```