GrabMail disposable email for ChatGPT

io.grabmail/mcp

Disposable email for agents: create an inbox, wait for the message, read the code. No key needed.

client:ChatGPT transport:streamable-http tools:6

Install GrabMail disposable email in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://grabmail.io/mcp

Custom connectors are a paid-plan feature and take a remote URL only. ChatGPT cannot run a packaged server locally. ChatGPT docs