Postmancer

Item: Postmancer
Rating: 58
Author: M8ven

A standalone MCP server for API testing and management, allowing AI assistants to interact with RESTful APIs through natural language.

→ hijaz/postmancer · listed on glama

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// key findings

⚠️

Known vulnerabilities in dependencies: 16 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 2 credentials: ENCRYPTION_KEY, POSTMANCER_ENCRYPTION_KEY

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

// known CVEs in dependencies16 high14 low

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

high@modelcontextprotocol/sdk@1.0.0GHSA-8r9q-7v3j-jr4g

Anthropic's MCP TypeScript SDK has a ReDoS vulnerability

high@modelcontextprotocol/sdk@1.0.0GHSA-w48q-cv73-mx4w

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

highaxios@1.5.0GHSA-35jp-ww65-95wh

axios Vulnerable to Full Man-in-the-Middle via Prototype Pollution Gadget in `config.proxy`

highaxios@1.5.0GHSA-3g43-6gmg-66jw

axios Vulnerable to Credential Theft and Response Hijacking via Prototype Pollution Gadget in Config Merge

highaxios@1.5.0GHSA-43fc-jf86-j433

Axios is Vulnerable to Denial of Service via __proto__ Key in mergeConfig

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.

configCOLLECTIONS_PATH— Path to store collections (default: ~/.postmancer)

🔐 secretENCRYPTION_KEY— Secret key used to encrypt environment variables marked as secrets (uses default key if not provided)

configLOG_LEVEL— "": "info"

🔐 secretPOSTMANCER_ENCRYPTION_KEY— Secret key used to encrypt credentials and tokens (generates a random key if not provided)

// 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 4 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/hijaz-postmancer-ac0c2d)](https://m8ven.ai/mcp/hijaz-postmancer-ac0c2d)

commit: d71f38e14421a3ff5fa65b335f164c1a0b002d5b

code hash: 3a9836bf49e6820716074a79f8e174d5a1459bebce8e9551d6442e8dcac33b6f

verified: 6/18/2026, 10:56:08 AM

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