Install and configure @brainwebuk/payload-plugin-mcp-oauth — OAuth 2.1 + PKCE + Dynamic Client Registration for a Payload @payloadcms/plugin-mcp server, so it can be added as a Custom Connector in Claude.ai. Use when adding OAuth to a Payload MCP app; wiring the plugin, proxy/middleware, or env; or debugging the install (consent 401 "Authentication required", SQLite push "no such column: oauth_clients_id", missing OAuth admin collections, "must be registered AFTER mcpPlugin", or OAuth tokens 401 while API keys work).
2026-06-06