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mcp/harbor
Grok

Checkmails — Email Verification for Grok

eu.checkmails/checkmails

Verify email deliverability by SMTP. Catch-all/disposable/role detection. EU-hosted, GDPR-ready.

client:Grok transport:streamable-http

Install Checkmails — Email Verification in Grok

.mcp.json (in your project root) 

{
  "mcpServers": {
    "checkmails": {
      "type": "http",
      "url": "https://checkmails.eu/api/mcp"
    }
  }
}

Grok Build reads Claude Code's .mcp.json and Claude Desktop's config unchanged, so a server you have already set up there needs nothing new. The Grok web app and X integration do not take custom servers. Grok docs

Checkmails — Email Verification in other clients

Checkmails — Email Verification MCP server