Is Postmark Mcp safe to use?

Postmark Mcp has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments. Licensed under MIT.

How do I install Postmark Mcp?

Postmark Mcp supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.

What can Postmark Mcp do?

Postmark Mcp provides 24 tools: sendEmail, sendEmailWithTemplate, sendBatch, sendBatchWithTemplate, listTemplates and 19 more. See the full tools list on the server page for descriptions and parameters.

What AI clients work with Postmark Mcp?

Postmark Mcp is compatible with claude-desktop, cursor, claude-code. It uses stdio and sse and http transport.

Is Postmark Mcp actively maintained?

Postmark Mcp is actively maintained — last commit was 10 days ago. It has 54 GitHub stars.

Postmark MCP

Name: Postmark MCP
Author: ActiveCampaign

by ActiveCampaign

Official Postmark MCP server by ActiveCampaign — 24 tools to send, template, search, and diagnose transactional email from Claude, Cursor & other AI assistants.

54 24 tools GitHub

No known CVEs

MIT license

Actively maintained

Last commit 10d ago

Works with most clients

Transport: stdio, sse, http

24 tools · ~2.2k tok

Grade C · 1.1% of 200K ctx

MCPpedia last refreshed this data 23h ago

Edit this pageView history

Postmark MCP is an MCP server that official Postmark MCP server by ActiveCampaign — 24 tools to send, template, search, and diagnose transactional email from Claude, Cursor & other AI assistants. Its tool list has not been published yet over stdio, sse and http, requires no API key, and scores 67/100 on MCPpedia's security, maintenance and efficiency rubric.

AI / ML Communication

Step 1

Install in your client

Config is the same across clients — only the file and path differ.

Supported in Claude Desktopstdio, sse, http · Node 18+

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "postmark": {
      "env": {
        "DEFAULT_SENDER_EMAIL": "your-sender-email@example.com",
        "POSTMARK_SERVER_TOKEN": "your-postmark-server-token",
        "DEFAULT_MESSAGE_STREAM": "your-message-stream"
      },
      "args": [
        "path/to/postmark-mcp/index.js"
      ],
      "command": "node"
    }
  }
}

Are you the author?

Add this badge to your README to show your security score and help users find safe servers.

Embed in your READMEAbout badges →

[![MCPpedia Score](https://mcppedia.org/api/badge/postmark-mcp)](https://mcppedia.org/s/postmark-mcp)

Read me

What Postmark Mcp does

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

Test This Server

This server supports HTTP transport. Be the first to test it — help the community know if it works.

Loading README…

Scored, not listed

Why this score

Five weighted categories — click any category to see the underlying evidence.

Score breakdown

67/100across 5 weighted dimensions

How we score →

0255075100

−33

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

No package registry to scan.

Inventory

Tools (24)

Click any tool to inspect its schema.

~2.2k tokens total

Community

Reviews

Be the first to review

Have you used this server?

Share your experience — it helps other developers decide.

How easy was setup?Did it work reliably?How was the documentation?

Frequently Asked Questions

Is Postmark Mcp safe to use?: Postmark Mcp has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments. Licensed under MIT.
How do I install Postmark Mcp?: Postmark Mcp supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.
What can Postmark Mcp do?: Postmark Mcp provides 24 tools: sendEmail, sendEmailWithTemplate, sendBatch, sendBatchWithTemplate, listTemplates and 19 more. See the full tools list on the server page for descriptions and parameters.
What AI clients work with Postmark Mcp?: Postmark Mcp is compatible with claude-desktop, cursor, claude-code. It uses stdio and sse and http transport.
Is Postmark Mcp actively maintained?: Postmark Mcp is actively maintained — last commit was 10 days ago. It has 54 GitHub stars.

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Has anyone used this with Cursor?How do you handle auth?Any alternatives?

Edit this pageView history

AI / ML Communication

Step 1

Install in your client

Config is the same across clients — only the file and path differ.

Supported in Claude Desktopstdio, sse, http · Node 18+

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "postmark": {
      "env": {
        "DEFAULT_SENDER_EMAIL": "your-sender-email@example.com",
        "POSTMARK_SERVER_TOKEN": "your-postmark-server-token",
        "DEFAULT_MESSAGE_STREAM": "your-message-stream"
      },
      "args": [
        "path/to/postmark-mcp/index.js"
      ],
      "command": "node"
    }
  }
}

Are you the author?

Add this badge to your README to show your security score and help users find safe servers.

Embed in your READMEAbout badges →

[![MCPpedia Score](https://mcppedia.org/api/badge/postmark-mcp)](https://mcppedia.org/s/postmark-mcp)

Read me

What Postmark Mcp does

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

Test This Server

This server supports HTTP transport. Be the first to test it — help the community know if it works.

README

Official Postmark MCP Server

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

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

Useful Docs

📒 API Documentation
🔎 API Explorer
📖 Engineering Articles
📝 Changelog — what's new in each release

Feedback

We'd love to hear from you! Please share your feedback and suggestions using our feedback form.

Setup

Requirements

Node.js v20 or higher
A Postmark account and server token

Installation (Local Development)

Clone the repository:

git clone https://github.com/ActiveCampaign/postmark-mcp
cd postmark-mcp

Install dependencies:

npm install
# or
yarn
# or
bun install

Configuration (Local Development)

Create your own environment file from the example

cp .env.example .env

Edit your .env to contain your Postmark credentials and settings.

Important: This is intended for local development purposes only. Secrets should never be stored in version control and .env type files should be added to .gitignore.

Required

Variable	Description
`POSTMARK_SERVER_TOKEN`	Your Postmark server API token
`DEFAULT_SENDER_EMAIL`	Default sender email address (must be a verified sender in Postmark)
`DEFAULT_MESSAGE_STREAM`	Postmark message stream (e.g., `outbound`)

Optional

Variable	Default	Description
`AGENT_LABEL`	—	A label for this instance (e.g., `prod`, `staging`). Sent as `X-Agent-Label` on every Postmark API request, useful for identifying traffic sources in logs or support tickets.
`WEBHOOK_URL_ALLOWLIST`	—	Comma-separated list of HTTPS URL prefixes that `createWebhook` will accept (e.g., `https://hooks.yourapp.com,https://inbound.corp.io`). When unset, any valid HTTPS URL is accepted.
`LOG_FILE`	—	Path to a file where structured JSON logs are appended in addition to stderr. The file is created if it does not exist. No rotation or size cap is applied — use an external tool such as `logrotate` to manage the file in long-running deployments.
`LOG_EMAIL_FULL`	`false`	Set to `true` to log email addresses without masking. By default the mailbox portion is partially masked in logs (`u**r@example.com`).

Run the server:

npm start
# or
yarn start
# or
bun start

Smoke test (requires valid .env):

The repo ships two smoke-test example files. Copy each to its non-example name (which is gitignored) before running, so your local edits — including any verified-sender addresses — never end up committed.

# Read-only suite (25 checks). Optionally edit RECIPIENT_WITH_HISTORY.
cp smoke-tes

... [View full README on GitHub](https://github.com/ActiveCampaign/postmark-mcp#readme)

Loading README…

Scored, not listed

Why this score

Five weighted categories — click any category to see the underlying evidence.

Score breakdown

67/100across 5 weighted dimensions

How we score →

0255075100

−33

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

No package registry to scan.

Inventory

Tools (24)

Click any tool to inspect its schema.

~2.2k tokens total

Community

Reviews

Be the first to review

Have you used this server?

Share your experience — it helps other developers decide.

How easy was setup?Did it work reliably?How was the documentation?

Frequently Asked Questions

Is Postmark Mcp safe to use?: Postmark Mcp has no known CVEs as of the latest MCPpedia security scan. It does not require authentication, so any local process can connect — keep this in mind in shared environments. Licensed under MIT.
How do I install Postmark Mcp?: Postmark Mcp supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.
What can Postmark Mcp do?: Postmark Mcp provides 24 tools: sendEmail, sendEmailWithTemplate, sendBatch, sendBatchWithTemplate, listTemplates and 19 more. See the full tools list on the server page for descriptions and parameters.
What AI clients work with Postmark Mcp?: Postmark Mcp is compatible with claude-desktop, cursor, claude-code. It uses stdio and sse and http transport.
Is Postmark Mcp actively maintained?: Postmark Mcp is actively maintained — last commit was 10 days ago. It has 54 GitHub stars.

Similar servers

Others in ai-ml / communication

View all →

Dsh MCP Client97

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Modelcontextprotocol96

The official MCP server implementation for the Perplexity API Platform

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Antigravity Workspace Template96

Workspace template + MCP server for Claude Code, Codex CLI, Cursor & Windsurf. Multi-agent knowledge engine (ag-refresh / ag-ask) that turns any codebase into a queryable AI assistant.

1.3k 2

Mcp_agent_mail96

Asynchronous coordination layer for AI coding agents: identities, inboxes, searchable threads, and advisory file leases over FastMCP + Git + SQLite

2.1k 6

MCP Security Weekly

Get CVE alerts and security updates for Postmark Mcp and similar servers.

Community

Discussion

Start a conversation

Ask a question, share a tip, or report an issue.

Has anyone used this with Cursor?How do you handle auth?Any alternatives?