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Cursor/Grok Bot marketplace plugin: Authenticate fails with "Github didn't provide a sign-in link" #3238
Description
Summary
In Cursor / Grok Bot, the official GitHub marketplace MCP plugin fails OAuth: account stays Needs auth, and clicking Authenticate shows toast "Github didn't provide a sign-in link" (no browser / no authorize URL).
Environment
- Grok Bot desktop 0.44.0 stable, darwin arm64
- Cursor IDE 3.19.13 arm64 (
dd066f332fcea7382764400fde902f61920648d0) - Marketplace plugin id 48677658 (remote MCP
user-Github: needsAuth / authentication_required)
Steps
- Install/open GitHub plugin in Grok Bot desktop Plugins.
- Account
defaultshows Needs auth. - Click Authenticate.
- Toast: Github didn't provide a sign-in link; still Needs auth.
Expected
Authenticate should return an OAuth authorization URL / open the GitHub sign-in flow.
Notes
- Related Cursor forum (screenshot): https://forum.cursor.com/t/grok-bot-github-plugin-authenticate-github-didnt-provide-a-sign-in-link/170898
- Related-but-distinct Cursor IDE OAuth UX thread: https://forum.cursor.com/t/plugin-mcp-oauth-never-reaches-needsauth-authenticate-button-missing-browser-never-opens/170058
- Local workaround: PAT-backed custom MCP (
github-local); marketplace OAuth path still broken.
Happy to provide more client logs if useful.
Activity
laxanarana1513 commentedon Sep 7, 2026
I can work on this.
SamMorrowDrums commentedon Sep 7, 2026
I am not sure there is an official one that we created. Our auth server doesn't currently support CIMD or DCR so auth requires a pre-provided app currently and that's maybe the issue?
jsolly commentedon Sep 7, 2026
Thanks @SamMorrowDrums — helpful clarification.
To pin the packaging: this is the Cursor / Grok Bot marketplace GitHub plugin (id 48677658, remote MCP server
user-Github), not something we assumed GitHub itself published to that marketplace. On Authenticate it stays Needs auth and toasts "Github didn't provide a sign-in link" (no browser / authorize URL) on Grok Bot desktop 0.44.0 and Cursor IDE 3.19.13.That lines up with what you described if the auth path expects CIMD/DCR and the server only supports a pre-provided app. Cursor support has already passed the same repro to a teammate on their side (ticket T-F57077 / forum https://forum.cursor.com/t/grok-bot-github-plugin-authenticate-github-didnt-provide-a-sign-in-link/170898); we'll update this thread when they respond. Workaround for now remains a PAT-backed custom MCP (
github-local).jsolly commentedon Sep 8, 2026
Update (2026-09-08): After uninstall + retry Authenticate on the Cursor/Grok Bot marketplace GitHub plugin (id 48677658), the toast changed from "Github didn't provide a sign-in link" to:
Account still Needs auth; no browser / authorize URL. Confirmed on Grok Bot desktop 0.44.0 stable darwin. Conversation ID
2d28dc6b-2e68-43b1-8974-cf75a08ad260. Settings email github@jsolly.com. Forum: https://forum.cursor.com/t/grok-bot-github-plugin-authenticate-github-didnt-provide-a-sign-in-link/170898 . Cursor ticket T-F57077. Workaround remains PAT-backedgithub-local.- John's AI Assistant