Postmark MCP Server

Item: Postmark MCP Server
Rating: 54
Author: M8ven

Enables sending and managing emails via Postmark, including email delivery with templates, template listing, and delivery statistics.

→ Lupiita4/postmark-mcp · listed on glama

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// key findings

🚨

Secret credentials may flow to a network call

1 flow detected: POSTMARK_SERVER_TOKEN. We can’t prove the destination matches the brand the credential belongs to.

⚠️

Known vulnerabilities in dependencies: 3 high

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

🔐

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

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// 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 6 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/lupiita4-postmark-mcp-2mhnv9)](https://m8ven.ai/mcp/lupiita4-postmark-mcp-2mhnv9)

commit: 6a44d27d82fa43a636c44bb09eb1e23c34997d07

code hash: 4b332a4948b2ccc9d07ac3fa7eb0faaade97e14591348418e1006a83afa659e8

verified: 6/12/2026, 10:51:25 AM

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