Source checked: 2026-07-24 Official source: https://developers.openai.com/plugins/deploy/connect-chatgpt
During Core onboarding, choose ChatGPT and select Copy address and open ChatGPT. Core copies your personalized Secure server address and opens https://chatgpt.com/plugins. Keep the full address on your clipboard, including its setup_attempt query parameter, so Core can recognize this exact connection.
1. Turn on Developer mode
- Open ChatGPT Settings.
- Select Plugins.
- Scroll to Developer mode at the bottom and enable it.
2. Add Core
- Open Plugins and choose Create app (or Browse plugins →
+if your account shows that path). - Enter
Corefor the name. - Add a short description, such as
Keeps my working context available across AI tools. - Under Connection, choose Server URL.
- Paste the complete Secure server address copied by Core.
- Under Authentication, choose OAuth.
3. Approve the connection
- Accept ChatGPT's acknowledgement and create the plugin.
- Approve Core when the sign-in window opens.
- Return to Core. The ChatGPT status changes to Connected after ChatGPT makes its first authenticated context check, which can take a few seconds. You can finish onboarding while Core waits.
Troubleshooting
Use Server URL, not Tunnel. Core is already available online; Tunnel is for a server running on a private network or local computer.
If the URL is missing or no longer works, return to Core and reopen ChatGPT setup. Core will prepare a fresh personalized address when needed. Outside onboarding, the standard address is https://core.gradien.ai/mcp/continuity; the shorter /mcp address is an advanced server and is not the normal setup choice.
If the callback contains invalid_scope and says the client cannot request openid, report the complete callback URL once. Creating duplicate plugins will not fix an authorization-server error.
For OpenAI's current setup requirements, see Connect your MCP server to ChatGPT.