MailTester Email Verification MCP Server: Install & Setup

Install MailTester Email Verification in Claude Code

Claude Code

claude mcp add --transport http mailtester-email-verification https://app.mailtester.com/mcp

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "mailtester-email-verification": {
      "url": "https://app.mailtester.com/mcp"
    }
  }
}

Verify emails (valid/invalid/risky/unknown): MX, SMTP, catch-all, disposable. Free agent key.

Yes, most likely. Open source and no paid account or API key is mentioned in the listing. Check the provider for current pricing.

Remote. Hosted by the provider. You connect with a URL, nothing to install.

Run: claude mcp add --transport http mailtester-email-verification https://app.mailtester.com/mcp

ninja.mailtester/email-verification

Verify email addresses live against their mail server and find work emails. Nothing stored.

mailtea-app/mailtea-agent-plugin

Send email and newsletters with Mailtea over MCP, plus skills for email and website design.

GSterlingPress/mailtype-api

Email-domain intelligence: MX capability, provider, disposable status, SPF, DMARC, and MTA-STS.

mailows/mailows-grok-plugin

Give AI agents their own email inboxes: list, read and send mail via scoped, revocable OAuth grants.

com.mailvakt/mailvakt

Use when email lands in spam: audits SPF, DKIM, DMARC, MX and returns the DNS records to fix it.

blissito/mailmask

Email for agents: domains, aliases, IMAP mailboxes, DNS, sending and webhooks via one API key.