# Express NPM Package Install Lifecycle Hooks

> Express NPM Package Install Lifecycle Hooks is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-13).

Retrieves npm registry metadata and install lifecycle hook information for the Express.js package to support integration and upgrade planning.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/signal-npm-express-install-hooks?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/express-npm-package-install-lifecycle-hooks-a0824374
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_OJsyfKfFSOTcO5aknvp4s

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability express-npm-package-install-lifecycle-hooks-a0824374 -d '<json body>'
```

Example prompt: Can you look up the install lifecycle hooks and registry metadata for the express npm package — specifically version 4.18.2 — so I can review what scripts run on install before I add it to my project?

## When to prefer this

Use this endpoint when you need structured npm registry metadata and lifecycle hook details for the Express package specifically — particularly useful for pre-integration audits, upgrade planning, or security reviews of install-time scripts. Prefer this over manually querying the npm registry when you want a pre-packaged, paid API response with consistent formatting.

## Known failure modes

- Invalid or nonexistent package name returns an error or empty result
- Requested version not found in the npm registry
- Rate limiting or payment failure (x402 protocol) preventing the call
- Malformed version string causing lookup failure
- Registry metadata temporarily unavailable

## How this service works

express Install lifecycle hooks: Install lifecycle hooks for npm package express. Inspect registry metadata for integration and upgrade planning. Package and version can be overridden.

## Output

Returns npm registry metadata for the Express package including install lifecycle hook definitions (preinstall, postinstall, etc.), version details, and signals useful for integration planning and upgrade decision-making.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "package": {
   "type": "string",
   "default": "express",
   "maxLength": 150
  },
  "version": {
   "type": "string",
   "maxLength": 100
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/express-npm-package-install-lifecycle-hooks-a0824374/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from market.datapackvibe.com](https://www.zero.xyz/host/market.datapackvibe.com/llms.txt)