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Marketing · Communication

Postmark MCP

activecampaign/postmark-mcp

Send emails with Postmark using Claude and other MCP-compatible AI assistants.

View on GitHub

Install

npx -y @activecampaign/postmark-mcp

Client configuration

{
  "mcpServers": {
    "postmark": {
      "command": "npx",
      "args": [
        "-y",
        "@activecampaign/postmark-mcp"
      ],
      "env": {
        "POSTMARK_SERVER_TOKEN": "<POSTMARK_SERVER_TOKEN>",
        "DEFAULT_SENDER_EMAIL": "<DEFAULT_SENDER_EMAIL>",
        "DEFAULT_MESSAGE_STREAM": "<DEFAULT_MESSAGE_STREAM>"
      }
    }
  }
}

Environment variables

POSTMARK_SERVER_TOKENDEFAULT_SENDER_EMAILDEFAULT_MESSAGE_STREAM
Author
@activecampaign
Category
Marketing, Communication
License
MIT
Updated
Oct 6, 2026

Features

  • Exposes a Model Context Protocol (MCP) server backed by your Postmark account

  • 24 tools spanning email sending (single + batch), templates (CRUD + validation), message search, delivery diagnostics, bounces, suppressions, stats, server info, and webhooks

  • MCP tool annotations (readOnlyHint, destructiveHint) let supporting clients auto-approve safe reads and require confirmation before mutating or destructive operations

  • Simple configuration via environment variables

  • Comprehensive error handling and graceful shutdown

  • Structured JSON logging to stderr with optional log-file persistence; email addresses are partially masked by default

  • HTTPS enforcement and optional domain allowlist for webhook registration

  • Automatic open/click tracking on every send

Tools (4)

  • Destructive

    editTemplate, deleteTemplate, deleteWebhook, deleteSuppressions

  • Sending

    sendEmail, sendEmailWithTemplate, sendBatch, sendBatchWithTemplate

  • Additive

    createTemplate, createSuppressions, createWebhook, activateBounce

  • Read-only

    All remaining 12 tools

Details on this page are taken from the project's README. Open README

Supported clients

Clients mentioned in this server's README:

View all
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