$git clone https://github.com/velias/mcp-auth-adapterAn authentication adapter for Model Context Protocol (MCP) world. It sits in front of any OAuth 2.0 / OIDC IdP and provides functionality required by the MCP Authorization specification for the most common MCP clients (Claude Code/Desktop, Cursor IDE, ChatGPT, Gemini CLI, VS Code, ...) and their known problematic behaviours.