Mail7 Email Validation MCP Server

by mail7 Your server? Claim it

local only

Mail7 Email Validation runs on your own machine — the client starts it, so there is no endpoint to ping. 33 installs a week from npm. Last commit 12 Aug 2026.

Verify email addresses, clean lists, and audit a domain SPF, DKIM, DMARC and MX setup.

Installs per day peak 16 · avg 5 · +41% w/w

a month agotoday

Installs / week

npm · mail7-mcp

Stars

1 open issue

12 Aug 2026

Last commit

2 releases in 90 days

MIT

License

JavaScript

Nothing serious here today

Today is the operative word: we check Mail7 Email Validation every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add email-validation -- npx -y mail7-mcp

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

{
  "mcpServers": {
    "email-validation": {
      "args": [
        "-y",
        "mail7-mcp"
      ],
      "command": "npx"
    }
  }
}

~/.codex/config.toml

[mcp_servers.email-validation]
command = "npx"
args = ["-y", "mail7-mcp"]

.cursor/mcp.json

{
  "mcpServers": {
    "email-validation": {
      "args": [
        "-y",
        "mail7-mcp"
      ],
      "command": "npx"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "email-validation": {
      "args": [
        "-y",
        "mail7-mcp"
      ],
      "command": "npx"
    }
  }
}

This one needs environment variables set before it will start: MAIL7_API_KEY (Mail7 API key. Optional, but anonymous callers are limited to 5 checks per minute and a 25-address bulk sample. Get one at https://mail7.net/account/), MAIL7_BASE_URL (Override the API endpoint. Defaults to https://mail7.net/api). The author declared them in the registry entry; get the values from the project itself.

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MX Verdict

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Free, read-only email and DNS checks: SPF, DKIM, DMARC, MX, DNS records, blocklists, domain health.

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Mail7 Email Validation — questions

Answers built from our own checks of this server.

Why is there no uptime for Mail7 Email Validation?

Mail7 Email Validation runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone. What can be measured is adoption: the npm package mail7-mcp was installed 33 times last week.

How do I connect Mail7 Email Validation?

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 runs locally, so the command pulls mail7-mcp straight from npm; nothing to host, nothing to sign up for.

How many people use Mail7 Email Validation?

The npm package mail7-mcp was installed 33 times in the last week. Week over week that is +41%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.

Is Mail7 Email Validation open source?

Yes — it is published under the MIT licence, written in JavaScript, 0 stars on GitHub and 1 open issue. The source link is on this page, so you can read exactly what it does with your data before you connect it.