AgentFirstStack Mail for ChatGPT

com.agentfirststack/mail

Email inboxes for AI agents: wait for mail, pull out verification codes and links, reply. Free.

client:ChatGPT transport:streamable-http

Install AgentFirstStack Mail in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://mail.agentfirststack.com/mcp

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