jamjet-policy

Item: jamjet-policy
Rating: 43
Author: M8ven

Drop-in stdio interceptor that gates MCP tools/call requests through a YAML policy (block / require_approval / audit / budget cap) before they reach the real server. The same policy file is reused by @jamjet/claude-code-hook and @jamjet/openai-guardrail, so one rule set covers Claude Desktop, Cursor, OpenAI Agents, and custom clients.

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// key findings

🚨

Known vulnerabilities in dependencies: 2 critical

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

🔐

You'll be asked for 2 credentials: JAMJET_CLOUD_TOKEN, JAMJET_E2E_API_KEY

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

// known CVEs in dependencies2 critical1 low

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

criticalvitest@2.0.0GHSA-5xrq-8626-4rwp

When Vitest UI server is listening, arbitrary file can be read and executed

criticalvitest@2.0.0GHSA-9crc-q9x8-hgqq

Vitest allows Remote Code Execution when accessing a malicious website while Vitest API server is listening

lowtsup@8.0.0GHSA-3mv9-4h5g-vhg3

tsup DOM Clobbering vulnerability

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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.

configJAMJET_API_BASE

configJAMJET_ARGS_REDACTION

configJAMJET_CLOUD_MODE

🔐 secretJAMJET_CLOUD_TOKEN

configJAMJET_E2E_API_BASE

🔐 secretJAMJET_E2E_API_KEY

configJAMJET_E2E_PROJECT_ID

configJAMJET_PROJECT

configJJ_DEMO_DRIFT

configOTEL_TRACE_ID

configVERCEL

// 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 2 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/jamjet-labs-jamjet-policy-1maq7x)](https://m8ven.ai/mcp/jamjet-labs-jamjet-policy-1maq7x)

commit: 88c7893ed12ce6ae1010ab5ef3cbcbe791c4eb8f

code hash: 351933efb81cc70782c0122f05eaa77807f7e8ab7489393053fcb4f65683714e

verified: 6/11/2026, 11:41:33 AM

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