Interop notes: Shipping OAuth on an MCP server for Claude and ChatGPT
NoStrawberry1162 · reddit · 2026-08-29
A technical breakdown of implementing OAuth for a hosted MCP server to bridge Claude.ai and ChatGPT. Key findings include mandatory RFC 7591 dynamic client registration, dual discovery documents (RFC 8414/9728), strict PKCE S256 enforcement, and precise redirecturi matching. The author emphasizes isolating connector tokens and highlights the necessity of live testing due to platform-specific quirks.
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