According tohttps://github.blog/changelog/2025-09-04-remote-github-mcp-server-is-now-generally-available/

The GitHub MCP Server now supports OAuth 2.1 + PKCE with integration into all first-party Copilot IDEs (VS Code, Visual Studio, JetBrains, Eclipse, Xcode) as well as Cursor, providing a simpler and faster alternative to using personal access tokens (PATs).

But docs say that only PAT auth is supported -https://github.com/github/github-mcp-server/tree/main/docs/installation-guides#support-by-host-application,https://github.com/github/github-mcp-server/blob/main/docs/installation-guides/install-cursor.md