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mcp/harbor
Verified official

Mail Security Tools MCP

v1.0.0

com.mailsecuritytools.api/email-security

Free DMARC, SPF, DKIM and MX checks, a 1-cent email security score and a $1 DNS fix plan.

transport:streamable-http tools:5
Website

Target client

run in your project directory 

claude mcp add --transport http email-security https://api.mailsecuritytools.com/mcp

setup guides: Claude Code Claude Desktop Cursor VS Code Zed Windsurf Cline Gemini CLI Grok ChatGPT Claude.ai LangChain

Adds it for this project only. Append --scope user to make it available everywhere. Claude Code docs

check_domain_email_security Read-only

check domain email security

pricing

pricing

email_security_score

email security score

check_email_address Read-only

check email address

email_fix_plan

email fix plan

All 5 tools, one page each

Mutating and Read-only are read off each tool's name, not its schema — a hint, not a guarantee. Check the server's own documentation before granting access.