- Claude Desktop
- Cursor
- Other clients
Claude Desktop loads MCP servers from its
claude_desktop_config.json.Open the config file
In Claude Desktop, go to Settings → Developer → Edit Config, or open the file directly:
Troubleshooting
| Symptom | Likely cause |
|---|---|
| Tools don’t appear | Client not restarted, or the server failed to start — check the client’s MCP logs. |
401 Unauthorized | Missing or invalid x-api-key / Bearer token. |
403 Forbidden | The key is valid but lacks the scope for that tool. Issue a key with the right scopes. |
npx errors in Claude Desktop | Node.js 20+ must be installed and on your PATH for the mcp-remote bridge. |