Email MCP Servers for HTTP / API

Cloudflare Workers MCP server: email-validator

Verify email deliverability & find business emails (single or bulk) via the Verifox API.

Verify emails (valid/invalid/risky/unknown): MX, SMTP, catch-all, disposable. Free agent key.

Read and search FranklyMail email and prepare drafts, replies, and forwards for human approval.

Design emails from a brief, send tests, send to your lists now or scheduled, and read delivery.

Inbox placement tests across Gmail, Outlook, Yahoo and 30+ providers.

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Connect inboxes to your AI, with built-in progress and optional owner-confirmed outgoing email.

An MCP server that validates email addresses on demand

Check whether an email address can receive mail — one address or a list — without sending to it.

Letterkeel: send email from your own domain via SMTP, Resend, SendGrid, Mailgun, Postmark

Letterkeel: send email from your own domain via SMTP, Resend, SendGrid, Mailgun, Postmark

Design emails from a brief, send tests, send to your lists now or scheduled, and read delivery.

Read, send, file and search email in any Gmail, Microsoft 365 or IMAP mailbox, plus its calendar.

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Security-first, self-hosted email archive with search, cited answers, and sending for AI agents.

Test-inbox API for email and SMS: create inboxes, long-poll messages, extract OTPs and links.

Disposable email inboxes for AI agents: create an address, wait for the OTP or verify link.

Send emails, track events, and manage contacts with MailJunky.

Your mailboxes in ChatGPT and Claude: Gmail, iCloud, Fastmail, any IMAP. Passwords stay yours.

Your own IMAP mailbox in any MCP client: search, read, flag, move; send and delete need confirm.