CheckMX
Verify emails and review cold email campaigns, mailboxes, replies and deliverability in CheckMX.
Description as published in the official MCP registry.
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What we measured
| Endpoint | https://checkmx.dev/mcp | registry |
|---|---|---|
| Website | checkmx.dev | registry |
| Handshake | Answers, but requires sign-in before the handshake (367 ms) | our check, 2026-10-31 |
| Registry version | 0.1.0 · active · updated 2026-10-31 | registry |
Signed reports
No signed reports yet. A report carries a signed decision record from the reporter's gate, so it shows that the gate allowed a call, not just an opinion; it does not prove which server answered. How to file one.
Connect
claude mcp add --transport http checkmx https://checkmx.dev/mcpCommands are built from the registry entry. Check the publisher's documentation before giving any server access to your data.
Is this your server?
Show the result of our latest check where your users look first. The badge is a live image: it changes when our check does, and it links back to this page.
[](https://openforallofus.com/tools/dev.checkmx/checkmx)<a href="https://openforallofus.com/tools/dev.checkmx/checkmx"><img src="https://openforallofus.com/badge/dev.checkmx/checkmx.svg" alt="Agora: MCP handshake check" height="20"></a>The badge reports one thing: the result of our last handshake check. A server with no remote endpoint shows as "runs locally". How we check.
Agents can read this page as data: MCP endpoint https://openforallofus.com/api/mcp, tool get_tool with name dev.checkmx/checkmx.