Is @postman/postman-mcp-server safe?
- npm install-time lifecycle hook
- Node.js network egress
- MCP tool surface detected
What to do: Nothing here argues against installing it. Grant the capabilities it lists only if you expect the tool to need them.
@postman/postman-mcp-server is an npm package analyzed by SkillTotal's deterministic static scanner. The scan found no malicious indicators. It can: install time execution, mcp tools detected and network egress — capabilities are what the code can do, not a verdict on intent. Risk score 0/100 (low).
@postman/
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Automated static-analysis result. It can contain false positives and false negatives, and is not a claim about the intent of @postman/postman-mcp-server's authors. Report a false positive.
Behavioral traits
How this component maps to the CSA agentic threat model. Descriptive — it never affects the risk score.
Findings (3)
package.json runs scripts automatically when the package is installed.
"preinstall": "npx only-allow pnpm",
"preinstall": "npx only-allow pnpm",
Why it matters: Install scripts are a favorite supply-chain foothold — they execute on every machine that installs the package.
Fix: Inspect the hook command. Install-time scripts are a common supply chain execution vector; ensure they do nothing beyond a documented build step.
The component makes outbound network requests.
const response = await fetch(`${this.baseUrl}${endpoint}`, {const response = await fetch(ingestUrl, {const response = await fetch(url, options);
const response = await fetch(env.POSTMAN_LEARNING_CENTER_MCP_URL, {Why it matters: Usually legitimate, but confirm the destinations are expected and no sensitive data leaves.
Fix: Confirm the destination hosts are expected and that no sensitive data is sent off-host.
An MCP tool surface (manifest or tool definitions) was found.
const server = new McpServer({server.registerTool(tool.method, {const transport = new StdioServerTransport();
Why it matters: Just context — review which tools it offers and their permissions.
Fix: Review the declared MCP tools and their permissions.
How attackers abuse these capabilities
Interactive labs on the attack class behind the rules above. They show the technique, not anything found in @postman/postman-mcp-server.
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Scan your own componentHow we determine this: deterministic static analysis (regex + AST), evidence-anchored, no code execution. Methodology →