Open this page on a computer. ChatGPT adds Summo on the web, not in its phone app.

Do this in ChatGPT on the web, at chatgpt.com. Using Codex? Its steps are under another app.

On your computer

1. 1
   Open Plugins in ChatGPT.

   Open ChatGPT plugins (opens in a new tab)
2. 2
   Select the plus button, then Add custom MCP server. MCP is how AI apps connect to services like Summo.
3. 3
   Name it Summo, and paste this as the Server URL:

   https://mcp.summo.cashCopy
4. 4
   For authentication, choose OAuth: ChatGPT signs in to Summo, and you approve it on your phone. Accept the warning, then select Create as a plugin.
5. 5
   Install the plugin. When ChatGPT signs in to Summo, it opens a Summo page with a code.

On your phone

6. 6
   In the Summo app, tap Scan code and point your phone at the page.
7. 7
   Check that the app asking is ChatGPT, then approve. Go back to ChatGPT, which finishes signing in.

• No Summo page yet? Start a chat in ChatGPT, type @ and choose Summo.
• Not seeing Scan code, or want to type the code? In the Summo app, go to More, then Connected agents, and tap Enter sign-in code.
• A code works once and expires after 10 minutes. Never enter a code from a sign-in page someone else sent you.

Your AI never holds your keys. Payments are signed on your phone.