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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
    license
    Not graded
    quality
    D
    maintenance
    A headless, disposable email inbox that an AI agent drives over MCP, enabling temporary email addresses and email receipt for testing signup flows.
    6 npm
    MIT
  • A
    license
    B
    quality
    B
    maintenance
    It enables AI agents and CI to run profile-driven SOAP/REST service tests with automatic login/session handling, test-customer locking, masked transaction-log/HAR catalog import, and cross-environment scenario execution.
    17
    MIT
  • A
    license
    Not graded
    quality
    B
    maintenance
    MCP server for Jama Connect that brings requirements, traceability, tests, and baselines into MCP clients like Claude, Cursor, VS Code, or GitHub Copilot, with access control, audit trail, and rate limiting. It provides 53 tools across 8 individually enableable toolsets, with an admin dashboard for managing access and usage.
    MIT
  • F
    license
    Not graded
    quality
    D
    maintenance
    Enables automated WCAG 2.2 AA accessibility audits of Figma designs and webpages. Generates detailed markdown reports with severity-grouped violations, specific criterion references, and concrete fix recommendations.
    -
  • A
    license
    A
    quality
    C
    maintenance
    Enables AI agents to test WCF/SOAP and REST services directly, with WSDL discovery, authenticated calls, and deterministic assertions. Supports YAML multi-step scenarios with variable extraction, JSONPath/JSON Schema checks, and CI runs without spawning PowerShell or curl.
    12
    MIT
  • A
    license
    Not graded
    quality
    D
    maintenance
    An MCP server exposing every documented Email on Acid API v5 request as a tool — 24 tools across authentication, email client lists, email rendering testing, and spam testing.
    MIT
  • A
    license
    Not graded
    quality
    B
    maintenance
    Enables AI agents to check email HTML for delivery-breaking problems before sending, returning structured diagnostics with rule id, severity, line and column, along with a tool that lists every available rule. It runs with no filesystem, network or environment access, so agents can validate markup without gaining new permissions.
    43 npm
    6
    MIT
  • A
    license
    A
    quality
    D
    maintenance
    Programmatic email deliverability testing for AI agents. Create inbox placement tests across Gmail, Outlook, Yahoo, Mail.ru, Yandex — get per-provider placement (Inbox/Spam/Promotions), SPF/DKIM/DMARC auth, Rspamd & SpamAssassin verdicts, DNS health (MX, PTR, DNSBL), and live SSE results.
    5
    72 npm
    2
    MIT
  • A
    license
    Not graded
    quality
    B
    maintenance
    Enables interaction with Gremlin's reliability management APIs to monitor service dependencies, run reliability experiments, generate reliability reports, and manage chaos engineering tests through natural language queries.
    25 npm
    6
    Apache 2.0
  • F
    license
    Not graded
    quality
    B
    maintenance
    Enables users to evaluate cold email copy for spam heuristics, formatting ratios, unsubscribe compliance, and readability, returning a composite spam score, deliverability tier, flags, and recommendations to improve primary inbox placement.
    7
    -
  • F
    license
    Not graded
    quality
    D
    maintenance
    Enables AI-powered document analysis and querying for project documentation using vector embeddings stored in Redis. Supports document upload, context-aware Q\&A, automatic test case generation, and requirements traceability through OpenAI integration.
    452 npm
    -
  • A
    license
    A
    quality
    B
    maintenance
    Enables recurring website maintenance checks — domain registration, SSL certificates, uptime, technical SEO and accessibility — across a portfolio of client sites, using publicly available information. Results are returned as structured data and can be sorted by urgency into a client-ready report.
    8
    91 npm
    MIT
  • A
    license
    A
    quality
    A
    maintenance
    Visual CVE audit dashboard for npm, Python, Go, and Rust projects. Scans your project manifests (package-lock.json, requirements.txt, go.sum, Cargo.lock) against OSV.dev live data, opens a browser dashboard for human review, then applies fixes only after explicit confirmation. Supports multi-service monorepos in one command.
    4
    24 npm
    5
    MIT
  • A
    license
    A
    quality
    B
    maintenance
    Email inboxes for AI agents: create a throwaway inbox, then block until the OTP or magic link arrives and get it back as a field. 7 tools, stdio, Python.
    8
    MIT
  • A
    license
    A
    quality
    C
    maintenance
    Enables coding agents to compile supplied files, run optional focused tests, and get static findings across ten programming languages, providing a deterministic feedback loop on the code they are about to return.
    1
    MIT
  • A
    license
    A
    quality
    C
    maintenance
    Enables AI agents to measure Chinese, Japanese and Korean page titles by rendered pixel width and judge whether they fit Google's search result column, flagging titles that would be truncated or cut near the edge. It also reads tags from local HTML files or directories and applies the same width, boilerplate and keyword-zone checks.
    2
    66 npm
    MIT
  • A
    license
    A
    quality
    B
    maintenance
    MCP server that exposes the JsonFabrica API as tools, so an AI agent can generate realistic synthetic JSON test data while it codes — single documents or full relational batches from reusable templates, reproducible with a seed. Runs locally over stdio; no network service.
    18
    79 npm
    MIT
  • A
    license
    A
    quality
    C
    maintenance
    Umbra is the trust layer for AI-generated code. It scores any repo 0-100 with file:line evidence (security, slop, Docker-verified build/boot, and claim receipts that catch agents lying about tests), and guards agent file writes mid-stream blocking leaked keys, alg:none JWTs, and git-hook plants before they land. Tools: scan_repo, guard_content, get_score.
    3
    74 npm
    1
    MIT
  • A
    license
    A
    quality
    B
    maintenance
    Test management over MCP: author test cases, run manual executions with per-case results, cut releases, and link automated tests to the cases they cover. Works against the hosted M00N Report service or a self-hosted instance.
    55
    79 npm
    MIT
  • A
    license
    A
    quality
    B
    maintenance
    Website audits for AI agents: cookie consent and tracking, Core Web Vitals and lost revenue, WCAG 2.2, email/DNS security (SPF, DMARC) and AI-search readiness, merged into one prioritised fix plan.
    11
    55 npm
    MIT
  • A
    license
    A
    quality
    B
    maintenance
    MCP server that gives an AI agent a throwaway test identity — a real disposable email address and a real UK phone number — so it can sign up for something it's testing and read back the verification email/SMS itself, without a human in the loop.
    5
    81 npm
    MIT
  • A
    license
    A
    quality
    A
    maintenance
    Enables AI agents to create disposable email inboxes, read messages, and wait for verification codes (OTPs) through MCP tools.
    4
    15 npm
    1
    MIT