MCP not working in Claude

Confirm the endpoint in your Claude Desktop config is exactly `https://www.deployunimatrix.com/api/mcp` and the Authorization header is `Bearer umx_...` with your actual key, no extra spaces or line breaks.

Validate your config file is syntactically correct JSON — a single misplaced comma or bracket will prevent Claude from loading any MCP servers, not just Unimatrix.

Fully quit and reopen Claude Desktop (not just close the window) after any config change — MCP servers are only loaded at startup.

Once connected, ask Claude to "list my palaces" as a quick test — if that returns real data, the connection is healthy and any remaining issue is likely that memory needs to be explicitly loaded (see the next article).

Still stuck? Use the Diagnose tool on the Help Center or see the Setup Troubleshooting FAQ for the most common causes.