Marrow is a Model Context Protocol (MCP) server: Evidence-grounded, graph-connected, correctable memory for agents. As an MCP server it plugs straight into AI assistants, exposing its functionality as tools the model can invoke on your behalf.
You can run Marrow two ways: connect to the hosted endpoint at https://mcp.marrow.id with no local install, or run it on your own machine via the npm package @marrowid/cli. Configuration happens through environment variables — you'll need MARROW_API_KEY. The current release is v1.0.10.
You'll find Marrow in the Memory category here on mcp.site; it connects to Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, Zed, and any other MCP client — see the install snippets below. If you maintain Marrow for marrow.id, claim this listing to verify ownership, earn the Verified badge, and keep the details current.