postmark-mcp

Item: postmark-mcp
Rating: 60
Author: M8ven

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

→ ActiveCampaign/postmark-mcp · listed on github_topic

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GitHub mcp.so

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// key findings

⚠️

Known vulnerabilities in dependencies: 3 high

Affects packages this MCP installs at runtime. Upgrade or remove the affected dependency.

✅

No credential exfiltration, no sensitive file access, no obfuscation

Static analysis found nothing flowing your secrets to unexpected places.

✅

Open source with a license and README

Anyone can audit the code, the license is declared, and the publisher documents what it does.

🔐

You'll be asked for 1 credential: POSTMARK_SERVER_TOKEN

These are read from process.env at runtime. Make sure you trust where they’ll be sent.

// known CVEs in dependencies3 high

Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.

high@modelcontextprotocol/sdk@1.12.1GHSA-345p-7cg4-v4c7

@modelcontextprotocol/sdk has cross-client data leak via shared server/transport instance reuse

high@modelcontextprotocol/sdk@1.12.1GHSA-8r9q-7v3j-jr4g

Anthropic's MCP TypeScript SDK has a ReDoS vulnerability

high@modelcontextprotocol/sdk@1.12.1GHSA-w48q-cv73-mx4w

Model Context Protocol (MCP) TypeScript SDK does not enable DNS rebinding protection by default

Depend on this server? Get alerted when its CVEs change.Watch this server free →

// required environment variables

This server reads these from process.env. You'll be asked to provide them before it can run.

configDEFAULT_MESSAGE_STREAM— Postmark message stream (e.g., 'outbound') Yes

configDEFAULT_SENDER_EMAIL— Default sender email address Yes

🔐 secretPOSTMARK_SERVER_TOKEN— Your Postmark server API token Yes

// full audit trail

The full breakdown of what we checked, the deductions that landed, the network hosts, the dependency advisories, and concrete fix guidance is available to verified publishers.

// improvement guidance — verified publishers only

We have 5 concrete improvements we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.

// embed badge in your README

[![M8ven Score](https://m8ven.ai/badge/mcp/activecampaign-postmark-mcp-3unko9)](https://m8ven.ai/mcp/activecampaign-postmark-mcp-3unko9)

commit: bfea8ee5af98a9606010c2b369fbb739202aec7f

code hash: c9395369c97cfa3a4dc8ee2b10556aae4eac90e262c9b48398de17351eb9d035

verified: 6/13/2026, 9:42:18 AM

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