Official MCP RegistryListed
MailTester Ninja
Verify email addresses live against their mail server and find work emails. Nothing stored.
First seen 28 Oct 2026. Evidence as of 31 Oct 2026.
2
Tools
From an anonymous probe
1
Source listings
Each with its own history
4
Recorded changes
Since first seen
Tools
| Tool | Description | Behaviour |
|---|---|---|
| find_email | 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. | Read-only |
| verify_email | 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. | Read-only |
Change history
- find_email: input schema changed (-middle_name)
- find_email: description changed (+"6 most common" +"first, firstlast, first_last, f.last)" +"Stops early when the domain accepts every address (catch-all) and then gives the most common pattern as "guess".")
- server instructions changed (+"check, including each pattern tried by find_email," -"check")
- Listed (registry)
| Source | Listing | First seen | Last seen | Versions |
|---|---|---|---|---|
| Official MCP Registry | ninja.mailtester/email-verification | 28 Oct 2026 | 31 Oct 2026 | 1 |