email59

Send transactional email from AI agents: sign up by email code, no domain or DNS setup. email59's MCP server lets an agent send email on its own. It signs up by asking for a 6-digit code at an address it can read, then uses the session key for everything else. Mail goes out from a name you choose at email59.com, so there's no domain to verify before the first send. Tools: `auth` (sign up / sign in by email code), `send_email` (one recipient: codes, receipts, alerts), `send_campaign` (marketing email, unsubscribe handled), `check_email` (free deep check: format, MX, SPF, DMARC, DKIM, MTA-STS, BIMI, disposable and role addresses, no key needed), `validate_email`, `block` / `unblock` / `list_blocklist`, `add_unsubscribe`, `get_account`, `update_account`, `create_api_key`, `list_api_keys`, `get_pricing`, `buy_pack` / `order_status` (returns a checkout link for a person to pay; the agent never pays). Limits worth knowing: email is sent from @email59.com and replies aren't received yet. Every email carries an unsubscribe link and a "system generated" line. No key yet? Call the `auth` tool with your email, then call it again with the code to get one. Send it as `Authorization: Bearer <key>`. Docs: https://email59.com/docs.html#mcp · Made by Biz59 LLC, New York. Submitted by the email59 team.

First seen 10 Oct 2026. Evidence as of 9 Nov 2026.