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"Free and open-source coding assistants" matching MCP servers:

  • MailCal MCP Server

    GlenYe-Coding
    F
    license
    Not graded
    quality
    B
    maintenance
    MCP server for MailCal that reads emails via IMAP, extracts calendar events (interviews, assessments, meetings, deadlines), and provides tools to list, sync, add, update, and delete these events.
    7

  • Google Workspace MCP Server

    risvan1605
    A
    license
    A
    quality
    B
    maintenance
    An MCP-compliant server that exposes Gmail and Google Docs as tools, enabling AI agents to draft, send, and manage emails, as well as create, read, and append to documents through natural language.
    9
    MIT

  • Gmail + SAP MCP Server

    suryanandan1
    F
    license
    Not graded
    quality
    C
    maintenance
    Provides MCP tools for searching, reading, and drafting Gmail emails, as well as querying SAP OData endpoints with safe read operations and mock mode.
  • plunk-mcp by ignytehq

    plunk-mcpofficial

    ignytehq
    A
    license
    A
    quality
    C
    maintenance
    A Model Context Protocol server for Plunk, the open-source self-hosted email platform. Provides 84 tools for transactional email, contacts, campaigns, segments, templates, workflows, events, and analytics through the Plunk API.
    11
    24
    2
    MIT

  • ox-mcp

    Rheopyrin
    A
    license
    B
    quality
    B
    maintenance
    MCP server for Open-Xchange & standards-based mail: email (IMAP/SMTP), Sieve filters, CalDAV calendar, CardDAV contacts, free/busy.
    33
    53
    MIT

  • LeadAce

    aitit-inc
    F
    license
    B
    quality
    B
    maintenance
    Outbound sales agent for Claude Code. MCP server handles prospect list building, dedup, quotas, and structured rejection feedback, while the plugin runs per-prospect research, email writing, Gmail sending, and reply tracking. Open source, self-hostable.
    55
    1

  • iCloud MCP

    jerichosequitin
    A
    license
    Not graded
    quality
    B
    maintenance
    An open-source project for a local iCloud Mail MCP integration. Currently provides only contribution and quality foundations, with Apple Mail access and MCP features deferred.
    27
    MIT

  • NornWeave

    DataCovey
    A
    license
    Not graded
    quality
    A
    maintenance
    Open-source, self-hosted Inbox-as-a-Service API for AI agents. It enables agents to manage email inboxes, send/receive emails, search messages, and wait for replies via REST or MCP.
    27
    Apache 2.0

  • Agent Email

    UseJunior
    A
    license
    Not graded
    quality
    A
    maintenance
    An open-source MCP server that provides AI agents with secure access to read, search, and manage emails via Microsoft 365 and Gmail. It features security-first defaults like recipient allowlists and markdown content conversion to facilitate safe agent interaction with mailboxes.
    4
    Apache 2.0

  • verifox-mcp

    verifoxturnix1
    A
    license
    A
    quality
    B
    maintenance
    Enables AI assistants to verify email deliverability and find business emails via the Verifox API, supporting single and bulk operations.
    6
    76
    MIT

  • @deliveriq/mcp

    Davison-Francis
    A
    license
    A
    quality
    C
    maintenance
    Email-deliverability tools for AI agents — 12 MCP tools across email verification, DNSBL across 50 zones, SPF/DKIM/DMARC analysis, spam-trap scoring, domain intelligence, and email finder. Free tier with no credit card.
    12
    63
    1
    MIT

  • multi-mailbox-gmail

    pkforge
    A
    license
    A
    quality
    B
    maintenance
    Enables connecting and searching multiple Gmail or Google Workspace accounts via friendly aliases, with read-only access and source mailbox attribution for each result.
    6
    MIT

  • atxp-mcp

    autonsol
    F
    license
    A
    quality
    D
    maintenance
    Access 5+ ATXP agent tools via MCP: web search, AI image generation, email, and music generation. Free tier with pay-per-use Pro tier via x402 micropayments (USDC on Base mainnet).
    5

  • @1tempmail/mcp-server

    haskx
    A
    license
    A
    quality
    C
    maintenance
    Enables AI assistants to generate temporary email addresses, check inboxes, and read messages using the 1TempMail API.
    3
    20
    MIT

  • pntr-cli

    oddunits
    A
    license
    A
    quality
    A
    maintenance
    Register free *.pntr.dev subdomains and manage them from your AI assistant — DNS records, wildcard DNS, disposable email inboxes, and HTTP request capture for webhook debugging. 15 tools over stdio; hosted endpoint also available.
    15
    135
    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