MailFerret MCP Server

by appin60-mailferret Your server? Claim it

answering

MailFerret is answering right now. Last checked moments ago. It exposes 3 tools.

Find and verify work emails with live SMTP checks and catch-all detection. Free 10 calls/day.

Uptime history 65 hours of history · worst hour 25%

65 hours agonow

94.6%

Uptime 24h

87 of 92 checks

Tools

read from the server

501 ms

Response time

average over 24h

open, no key

Access

streamable-http

MailFerret does not always answer

Over the last week it answered 97.5% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 0 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add mailferret --transport http https://mailferret.appin60.com/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "mailferret": {
      "url": "https://mailferret.appin60.com/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.mailferret]
url = "https://mailferret.appin60.com/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "mailferret": {
      "url": "https://mailferret.appin60.com/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "mailferret": {
      "url": "https://mailferret.appin60.com/mcp"
    }
  }
}

Available tools 3

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

domain

domain_email_intel

A company's email setup: provider, catch-all, SaaS tools from SPF, DMARC, public emails, likely pattern.

verify

verify_email

Check whether an email address is deliverable (MX, provider, catch-all, live SMTP RCPT).

work

find_work_email

Find a person's verified work email from first name, last name and company domain (live SMTP check, catch-all detection).

Endpoints

URL	Transport	State	Latency	Checked
https://mailferret.appin60.com/mcp	streamable-http	answering	478 ms	0 min ago

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MailFerret — questions

Answers built from our own checks of this server.

What can MailFerret do?

It exposes 3 tools, read directly from the server on our last check. Among them: domain_email_intel, find_work_email, verify_email. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is MailFerret working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 87 of 92 checks got a reply (94.6%), average response time 501 ms. The bar chart above shows every period we have measured.

How do I connect MailFerret?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does MailFerret need an API key?

No. MailFerret completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 3 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is MailFerret?

It answers our handshake in 501 ms on average, which is faster than 23% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.