- Cursor clean reset: ⌘/Ctrl Shift P → run
Cursor: Clear All MCP Tokens(resets all MCP servers and auth; re-enable Kernel and re-authenticate). - Clear saved auth and retry:
rm -rf ~/.mcp-auth - Node.js version: Ensure a recent Node.js version when using
npx mcp-remote. - Strict networks: If behind strict networks, try stdio via
mcp-remote, or explicitly set the transport your client supports.
OAuth issuer mismatch on strict clients
If you have issues connecting with OAuth on a client that does strict RFC 9207 issuer verification — an error rejecting the flow before token exchange because the returned issuer doesn’t match what discovery advertised — connect with an API key instead of OAuth. Get a project-scoped key from the Kernel Dashboard and configure it the way your client expects a bearer token (e.g. fx’sbearer_token_env). See Authentication for the general API-key format.