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20 Best Email MCP Servers: compared and ranked, November 2026Ranked from 3,360 matching servers on stars, growth, downloads and maintenance. Updated .

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  • A
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    Enables AI agents to inspect any public domain’s web technology stack, email deliverability and DNS health (MX, SPF, DKIM, DMARC, MTA-STS, TLS-RPT, BIMI), and HTTPS security posture with typed JSON scores and remediation-ready findings, plus history, bulk checks, monitoring alerts, and reverse technology lookups.
    12
    MIT
  • A
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    Not graded
    quality
    A
    maintenance
    Manage a fleet of OPNsense firewalls from an AI agent, inside guardrails it can't drive around. MCP server for central management of OPNsense firewall fleets. 129 tools across devices, config sync, tasks, schedules, templates, backups and remote consoles - destructive actions confirmation-gated, MCP-issued tokens lifetime-bounded, backup and storage secrets excluded from the toolset entirely.
    Apache 2.0
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    maintenance
    Enables querying an F5 BIG-IP lab through read-only iControl REST calls, letting Claude inspect system and HA status, virtual servers, pool member health, monitors, and other objects via natural language. All tools are GET-only and paired with a read-only BIG-IP user role so nothing on the device can be changed.
    MIT
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    A
    quality
    D
    maintenance
    Self-hostable MCP server for WhisperGraph — a graph of 7.39B nodes / 39B edges mapping DNS, BGP, GeoIP, WHOIS, and threat intelligence. Six read-only tools (Cypher query + schema introspection + threat assessment), six resources, eight investigation prompts. stdio and Streamable HTTP transports.
    8
    70 npm
    1
    Apache 2.0
  • A
    license
    A
    quality
    B
    maintenance
    Gives AI agents access to public internet interconnection data, letting them look up which networks connect to each other, at which internet exchanges and facilities they are present, under what peering policy, and who a given IP range or AS number is registered to. Responses are compact, sourced and aged, and it distinguishes missing records from genuinely absent networks rather than guessing.
    1
    23 PyPI
    MIT
  • A
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    A
    quality
    B
    maintenance
    Enables agents to run SEO and AI-search readiness audits (llms.txt, crawler access, sitemaps, structured data, redirects, indexability, and more), look up startup revenue listings and leaderboards, and check a domain's SPF, DKIM, DMARC, and MX records with concrete fixes. Runs locally over stdio with no account or API key, and frames all third-party responses as untrusted data.
    7
    MIT
  • A
    license
    A
    quality
    B
    maintenance
    Enables looking up registration details for domains, URLs, or email addresses, returning registrar, creation and expiry dates, domain age, status codes, nameservers, DNSSEC, and registrant organization and country per domain. Queries registries directly via RDAP or WHOIS with no API key, running on Apify.
    1
    229 npm
    MIT
  • A
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    Checks email deliverability: audits a domain's SPF (including the 10-lookup limit), DKIM, DMARC and MX records with ranked fixes, checks a sending IP's reverse DNS and blocklist listings, and tests email headers against Gmail and Yahoo bulk sender requirements.
    3
    MIT
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    quality
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    maintenance
    Enables AI agents to classify IP addresses through the VPNDetection API with read-only tools that detect VPNs, residential and datacenter proxies, Tor nodes, relays, hosting providers and CDNs, in single or bulk lookups of up to 100 addresses. It also exposes which datasets an organisation is licensed for, along with their metadata and published checksums.
    7
    930 npm
    1
    MIT
  • A
    license
    A
    quality
    C
    maintenance
    A Model Context Protocol (MCP) server for the RIPE Atlas network measurement platform. Enables AI assistants to create network measurements, retrieve results, search probes, and manage credits.
    13
    44 npm
    5
    MIT
  • A
    license
    A
    quality
    A
    maintenance
    Look up any IP address with FindIP: geolocation, network and ASN, and VPN, proxy, Tor and datacenter detection. For websites that use FindIP Shield, list the recent risky visitor events and explain the reasons behind one event.
    5
    54 npm
    MIT
  • A
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    A
    quality
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    maintenance
    MCP server for email deliverability: validate SPF/DKIM/DMARC/BIMI, check blacklists, test SMTP/IMAP, look up DNS, and generate ready-to-deploy records for any major email provider. Ships with two one-click prompts (audit-deliverability, setup-dns). Public, no auth.
    17
    MIT
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    maintenance
    Enables MCP clients to submit proposed AI-agent actions for pre-execution allow, hold, or deny authorization with risk scoring and hash-chained audit records, and to broker commands for enrolled legacy/OT devices under generated network-enforcement plans and telemetry tamper detection.
    7
    MIT
  • A
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    A
    quality
    A
    maintenance
    Provides a secure, job-oriented MCP connector for NetBox device lookup, enabling retrieval of device identity, status, site, role, and primary IP by name or ID without write access or bulk enumeration.
    5
    Apache 2.0