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20 Best Email MCP Servers: compared and ranked, September 2026Ranked from 2,148 matching servers on stars, growth, downloads and maintenance. Updated .

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  • F
    license
    Not graded
    quality
    D
    maintenance
    Exposes 19 professional DNS diagnostic tools from the iDig API, enabling AI clients to perform DNS lookups, email security audits, DNSSEC validation, propagation checks, and more through natural language.
  • A
    license
    A
    quality
    A
    maintenance
    Domain security reconnaissance for AI agents — 13 tools (DNS+DNSSEC, SSL/TLS, HTTP security headers, SPF/DKIM/DMARC email auth, port scan, ASN, RDAP/WHOIS) plus a one-shot security_scan returning a 0–100 Health Score (A–F). Free, no API key.
    13
    56
    1
    MIT
  • A
    license
    A
    quality
    A
    maintenance
    Diagnoses a domain's email authentication — SPF, DMARC, DKIM, MX, blacklists and domain or SSL expiry - and returns copy-paste fix records generated by a validating engine, never a language model. The MCP server is hosted remotely; this repository carries the plugin manifest, connector config and bundled skill.
    16
    82
    2
    Apache 2.0
  • A
    license
    A
    quality
    C
    maintenance
    The official remote Model Context Protocol (MCP) server for Muumuu Domain — a domain registration service operated by GMO Pepabo, Inc. Search and register domains, manage owned domains and contracts, and configure DNS records — all through natural language conversations with AI assistants.
    11
    1
    MIT
  • A
    license
    A
    quality
    B
    maintenance
    A domain security and privacy checker MCP server that runs locally, performing DNS, TLS, HTTP, and RDAP lookups to generate a scored report covering certificates, email authentication, DNS, and web security headers.
    3
    78
    GPL 3.0
  • A
    license
    A
    quality
    A
    maintenance
    MCP (Model Context Protocol) server for rustunnel. Lets AI agents (Claude Code, Cursor, Windsurf) create and manage public tunnels to local services from inside an agent session.
    6
    654
    AGPL 3.0
  • A
    license
    A
    quality
    C
    maintenance
    MCP server that exposes mDNS service discovery functionality via the Model Context Protocol, enabling LLMs to discover and query zero-configuration network services on the local network.
    6
    MIT
  • A
    license
    A
    quality
    B
    maintenance
    An MCP server that gives an AI agent safe, high-level control over Namecheap domains – availability checks, registration, DNS, email forwarding, transfers, WhoisGuard privacy, and account balance via Namecheap's XML API. Designed for safe LLM interaction with built-in confirmation gates and read-modify-write DNS operations.
    20
    MIT
  • A
    license
    A
    quality
    D
    maintenance
    A production-ready MCP server that wraps Nmap to enable AI agents to perform automated network security assessments, including port scanning, host discovery, service detection, OS fingerprinting, and vulnerability scanning.
    6
    16
    Apache 2.0
  • A
    license
    A
    quality
    C
    maintenance
    A Model Context Protocol (MCP) server that provides comprehensive WHOIS lookup capabilities using the IP2WHOIS API. This server allows AI agents to query domain registration details, including expiry dates, registrar information, and registrant data.
    2
    1
    MIT
  • A
    license
    A
    quality
    C
    maintenance
    An MCP server that enables AI assistants to diagnose network and service problems by walking a structured funnel of cURL timing metrics, identifying which hop is at fault, and providing targeted recommendations.
    4
    MIT