MailTester Email Verification
Verify emails (valid/invalid/risky/unknown): MX, SMTP, catch-all, disposable. Free agent key.
Description as published in the official MCP registry.
Maintain this server? Get the badge
What we measured
| Endpoint | https://app.mailtester.com/mcp | registry |
|---|---|---|
| Handshake | Answers the MCP handshake and lists its tools (1,956 ms) | our check, 2026-10-12 |
| Protocol version | 2024-11-05 | our check, 2026-10-12 |
| Tools (9) | get_api_key, get_credit_balance, list_lists, get_list, explain_result, verify_email, verify_batch, estimate_cost, get_batch_status | tools/list, 2026-10-12 |
| GitHub stars | 0 | github.com/mailtester-com/mailtester-mcp |
| Last push | 2026-10-08 | GitHub API |
| Registry version | 1.0.1 · active · updated 2026-10-08 | 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 email-verification https://app.mailtester.com/mcpCommands are built from the registry entry. Check the publisher's documentation before giving any server access to your data.
Related servers
- emailmd Render markdown into email-safe HTML, lint drafts for deliverability problems, and preview…
- e2a — email for AI agents Authenticated email gateway for AI agents — per-agent inboxes, HITL approval, SPF/DKIM…
- e2a — email for AI agents Authenticated email gateway for AI agents — per-agent inboxes, HITL approval, SPF/DKIM…
- Email List Validation Email Verification Verify emails (valid/invalid/risky/unknown): MX, SMTP, catch-all, disposable. Free agent…
- Kawaa email verification Check whether an email address can receive mail — one address or a list — without sending…
- Qualisend Email Verification Verify email addresses and clean lists to improve deliverability and sender reputation.
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/com.mailtester/email-verification)<a href="https://openforallofus.com/tools/com.mailtester/email-verification"><img src="https://openforallofus.com/badge/com.mailtester/email-verification.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 com.mailtester/email-verification.