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MailTester Ninja
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MailTester Ninja MCP server

mailtester.ninja

Yes. MailTester Ninja publishes an official MCP server at https://mcp.mailtester.ninja/mcp. It's hosted. It offers 2 tools. We last checked it on 1 Nov 2026.

Official MCP server
Hosted
Sign-in: see vendor docs

Official: documented on MailTester Ninja's own site, at mailtester.ninja. Checked 1 Nov 2026. Maintained by Stuart Brameld.

Key facts

As of 1 Nov 2026, MailTester Ninja's official MCP server scores 65/100 (provisional) on MartechDB's Agent Readiness Index (v1.1). It lists 2 tools.

How the Agent Readiness Index works · Wrong? Suggest a correction

MailTester Ninja MCP server review

65/100

MailTester Ninja's MailTester Ninja MCP scores 65/100 on MartechDB's Agent Readiness Index: easy to connect an AI agent to, with a few gaps.

The good

  • Hosted by MailTester Ninja: connect by URL, with nothing to install

  • Documented, with 2 tools known

The bad

  • Nothing we've found.

Not checked yet: how you sign in; what agent access costs. Anything not checked scores nothing.

Official MCP server

MailTester Ninja MCP

Address
https://mcp.mailtester.ninja/mcp
Runs
Hosted
Sign-in
Sign-in: see vendor docs
Vendor docs
Official MCP Registry
Not listed
How we know it's official
  • Documented on MailTester Ninja's own site, at mailtester.ninja.
Checked 1 Nov 2026.
Documentation
mailtester.ninja/integrations/mcp/
Tools
2 tools · listed 1 Nov 2026
First seen
29 Oct 2026
Last checked
Reachable ·
30 Oct 2026: reachable
31 Oct 2026: reachable
1 Nov 2026: reachable

MailTester Ninja MCP tools (2)

As the server lists them. Names and descriptions are the vendor's own.

  • verify_email Verify an email address
    Read-only

    Check in real time whether an email address exists and can receive mail, by asking the recipient's mail server (no message is sent). Returns code "ok" (valid), "ko" (invalid) or "mb" (uncertain, such as a catch-all domain) with a message.

  • find_email Find a professional email address
    Read-only

    Find the work email address of a person from their name and their company domain. Tries the 6 most common patterns (first.last, flast, first, firstlast, first_last, f.last) one by one and returns the first address the mail server accepts. Stops early when the domain accepts every address (catch-all) and then gives the most common pattern as "guess". Each pattern tried counts as one verification. Personal email providers such as gmail.com are not searched. Requires a paid MailTester Ninja key.

Connect your AI to MailTester Ninja

Add the official MailTester Ninja MCP server to Claude, ChatGPT or your editor.

Connect MailTester Ninja MCP to Claude

Claude.ai and Claude Desktop

  1. Open Customize, then Connectors.

  2. Click +, then Add custom connector.

  3. Name it MailTester Ninja, paste the address below and click Add.

Claude Code

MailTester Ninja MCP server questions

Does MailTester Ninja have an official MCP server?

Yes. MailTester Ninja publishes its MCP server itself. MailTester Ninja's own documentation describes it. MartechDB only lists servers a vendor publishes, never community copies.

What is the MailTester Ninja MCP server URL?

The address is https://mcp.mailtester.ninja/mcp.

How do I connect MailTester Ninja MCP to Claude, ChatGPT or Cursor?

In Claude, add https://mcp.mailtester.ninja/mcp as a custom connector (Customize, Connectors, Add custom connector). In Cursor, use the Add to Cursor link on MartechDB's page, or paste the JSON settings into your mcp.json. In Claude Code, run: claude mcp add --transport http mailtester-ninja https://mcp.mailtester.ninja/mcp

What can the MailTester Ninja MCP server do?

It offers 2 tools: verify_email and find_email (as listed on 1 Nov 2026). All of them are marked read-only.

Is the MailTester Ninja MCP server in the official MCP Registry?

No. MailTester Ninja hasn't published it to the official MCP Registry.

Is the MailTester Ninja MCP server working?

Yes. It answered our most recent check. We last checked it on 1 Nov 2026.

What are the alternatives to MailTester Ninja's MCP server?

In Email delivery & deliverability, the most agent-friendly alternatives with an official MCP server are G-Lock Software (92/100), Usebouncer (91/100), Bird (89/100), Unspam.email (88/100) and Resend (85/100). MailTester Ninja scores 65/100 on the same index.

Alternatives to MailTester Ninja's MCP server

Vendors in Email delivery & deliverability with an official MCP server, the most agent-friendly first. MailTester Ninja scores 65/100.

G-Lock Software

G-Lock Software

glockapps.com

92/100
Usebouncer

Usebouncer

usebouncer.com

91/100
Bird

Bird

bird.com

89/100
Unspam.email

Unspam.email

unspam.email

88/100
Resend

Resend

resend.com

85/100
Compare all 24 Email delivery & deliverability vendors →

Change history

What we've seen change for MailTester Ninja, newest first.

  1. MailTester Ninja: Added to MartechDB with MailTester Ninja MCP

Use with AI

Connect your AI to MartechDB

Then ask it about MailTester Ninja, or any of the 1,698 marketing tools with an official MCP server. Free, no sign-in.

Claude.ai and Claude Desktop

  1. Open Customize, then Connectors.

  2. Click +, then Add custom connector.

  3. Name it MartechDB, paste the address below and click Add. There's no sign-in.

The free plan allows one custom connector. On Team and Enterprise plans, an owner adds the connector first.

Show that your MCP server is verified

If you work at MailTester Ninja, add this badge to your MCP docs or README. It's free, it's the same for every vendor, and it updates from our daily checks: it shows uptime while the server responds, and says so if it stops.

Official MCP server, verified by MartechDB
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