email infrastructure · built for autonomous agents

Email for AI agents

Hand your agent one API key and it spins up real inboxes on demand — verifies OTPs, clicks magic links, claims trials. No bot detection, no rate limits.

Get an agent key Use the MCP server

MCP server included

Drop-in tools for Claude Desktop, Cursor, Hermes, OpenClaw — any MCP client.

One key, many inboxes

Spin up real, deliverable inboxes on demand with a single API key.

Real email, never flagged

Genuine addresses with no automation clauses in the way.

from mailflat import MailFlat
 
inbox = MailFlat(api_key).create(label="signup")
browser.fill("#email", inbox.address)
otp = inbox.wait_for_otp(timeout=30)  # real OTP
browser.fill("#code", otp)

Frequently asked questions

Which agent frameworks work?

Any MCP client (Claude Desktop, Cursor, Hermes, OpenClaw), plus Python and JS SDKs and a copy-paste tool spec for GPT/Claude.

How long do the inboxes last?

The address stays until you delete it; messages auto-purge every two hours by default.

Will the addresses get flagged?

They're real, deliverable inboxes — not throwaway domains — so they behave like normal email.

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Ready to try it?

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MailFlat — instant email inboxes for testing, automation & AI agents.