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"Examples of MCPs (Microservices Communication Protocols) That Do Not Require API Keys" matching MCP servers:

  • mcp-send-that-email

    pipeworx-io
    A
    license
    Not graded
    quality
    C
    maintenance
    Enables AI agents to analyze whether they should send an email, evaluating passive aggression and regret probability with a recommendation heavily weighted toward no.
    10
    1
    MIT

  • mcps-for-macos

    shaack
    A
    license
    Not graded
    quality
    C
    maintenance
    A collection of small MCP servers for macOS automation that expose Apple Mail, MoneyMoney, and Spotlight functionality as tools via AppleScript and command-line, enabling AI applications to search mail, manage contacts and transactions, and perform system-wide file searches through natural language.
    MIT

  • email-validator-api

    lazymac2x
    F
    license
    Not graded
    quality
    D
    maintenance
    Comprehensive email validation MCP server that checks syntax, MX records, disposable domains, role-based accounts, SPF/DKIM, typo suggestions, and risk scoring.

  • mailtype-api

    GSterlingPress
    F
    license
    Not graded
    quality
    B
    maintenance
    MCP server for inspecting email domains and addresses, providing objective domain-level email infrastructure answers such as MX, SPF, DMARC, MTA-STS, and disposable-domain evidence.

  • Microsoft MCP

    0xka13b
    A
    license
    Not graded
    quality
    B
    maintenance
    Model Context Protocol servers for Microsoft 365, enabling AI assistants to interact with Calendar, Contacts, OneDrive, Outlook, and SharePoint via the Microsoft Graph API.
    MIT
  • Sendmux Email Inbox API + Sending by Sendmux

    Sendmux Email Inbox API +official

    Sendmux
    A
    license
    A
    quality
    A
    maintenance
    Sendmux is an email inbox API and email API for AI agents. Use this MCP server to let authorised agents work with Sendmux mailboxes, inbound email, clean JSON parsing, webhooks, outbound sending, provider routing, logs, billing, and team controls.
    30
    78
    MIT

  • Samotpravil MCP

    dkanster
    A
    license
    D
    quality
    C
    maintenance
    MCP server wrapping Samotpravil API documentation, providing tools to search for methods, parameters, and examples, with optional proxy to the live API.
    58
    75
    MIT

  • Email Finder API

    Br0ski777
    A
    license
    Not graded
    quality
    B
    maintenance
    Find professional email addresses from name + company domain. Tests 15+ patterns against MX records with confidence scoring, with pay-per-call via x402.
    MIT

  • Email Deliverability Audit API

    Br0ski777
    A
    license
    Not graded
    quality
    B
    maintenance
    Audits email deliverability configuration for a domain, checking SPF, DKIM, DMARC, and MX records, returning a score and recommendations.
    MIT
  • Cakemail API MCP Server by cakemail

    Cakemail API MCP Serverofficial

    cakemail
    F
    license
    Not graded
    quality
    D
    maintenance
    Enables AI assistants to browse, inspect, and call the Cakemail API via dynamically loaded OpenAPI spec.

  • Zoho Mail MCP Server

    ampcome-mcps
    F
    license
    Not graded
    quality
    D
    maintenance
    Enables AI assistants to manage Zoho Mail accounts, including sending/receiving emails, folder and label management, organization administration, and productivity tools like tasks and notes.
    2

  • IMAP MCP Pro

    Temple-of-Epiphany
    F
    license
    Not graded
    quality
    A
    maintenance
    An enterprise-grade MCP server that provides production-ready IMAP email integration with advanced reliability features, comprehensive monitoring, and secure account management.

  • proton-mail-mcp

    sethbang
    A
    license
    A
    quality
    B
    maintenance
    Unofficial MCP server for Proton Mail (not affiliated with Proton AG) — send, read, search & organize email over SMTP/IMAP
    31
    91
    3
    MIT

  • Work Email Waterfall MCP

    mambalabsdev
    A
    license
    A
    quality
    B
    maintenance
    Enables finding and verifying work emails for contacts through a waterfall of provider keys, with per-provider cost attribution and verification after each finder.
    1
    142
    MIT

  • SandMail — Disposable Email

    brobin002
    A
    license
    A
    quality
    D
    maintenance
    Create disposable email inboxes, extract OTP codes in 15 languages, and receive webhooks — all from your AI agent. One call: create inbox → wait for email → get the verification code. Supports 7 domains, email forwarding, and HMAC-signed webhooks with OTP included in payload. Free tier available.
    8
    10
    MIT

  • AnyMail MCP

    MarcinWalendowski
    A
    license
    A
    quality
    A
    maintenance
    Connect all your email accounts to your AI agent — not just one. AnyMail MCP is a local MCP server that gives an agent full read/send/organize/delete access across multiple Gmail accounts at once, over IMAP/SMTP.
    26
    36
    MIT

  • mail-mcp

    LupinLin1
    A
    license
    Not graded
    quality
    C
    maintenance
    An MCP server for email operations supporting IMAP and SMTP protocols, enabling sending, receiving, searching, and managing emails with attachments.
    MIT