@fastmail@mastodon.social well, I've tried configuring in a few different tools now. Got it okay in Claude.ai on web to work, but everything local is failing. ``` > opencode mcp auth fastmail ┌ MCP OAuth Authentication │ ■ Authentication failed │ ■ invalid_request no scope │ └ Done ``` claude cli logs when attempting to authenticate: ``` 2026-04-23T03:49:18.353Z [DEBUG] MCP server "fastmail": Returning cached discovery state (authServer: https://api.fastmail.com) 2026-04-23T03:49:18.477Z [DEBUG] MCP server "fastmail": Saving discovery state (authServer: https://api.fastmail.com) 2026-04-23T03:49:18.527Z [DEBUG] MCP server "fastmail": No client info found 2026-04-23T03:49:18.594Z [DEBUG] MCP server "fastmail": HTTP Connection failed after 1436ms: invalid_request no scope (code: none, errno: none) 2026-04-23T03:49:18.594Z [ERROR] MCP server "fastmail" o3T: invalid_request no scope 2026-04-23T03:49:18.595Z [DEBUG] MCP server "fastmail": Connection failed after 1437ms: invalid_request no scope 2026-04-23T03:49:18.595Z [ERROR] MCP server "fastmail" Connection failed: invalid_request no scope ``` codex cli: ``` > codex mcp login fastmail Error: Registration failed: Dynamic registration failed: Registration failed: HTTP 400 Bad Request: {"error_description":"invalid_request no scope","error":"invalid_request"} ```