# npm ws Package Artifact Integrity Metadata

> npm ws Package Artifact Integrity Metadata is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-17).

Retrieves published artifact integrity metadata (checksums, signatures, registry info) for the npm package 'ws' or any specified npm package and version.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/signal-npm-ws-artifact-integrity?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-17
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/npm-ws-package-artifact-integrity-metadata-d759969a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_IqRhV6-MoD5_Bcyojw4tA

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 npm-ws-package-artifact-integrity-metadata-d759969a -d '<json body>'
```

Example prompt: Can you pull the artifact integrity metadata for the npm package ws version 8.17.1 so I can verify its checksum before adding it to our dependencies?

## When to prefer this

Use this endpoint when you need quick, programmatic access to npm artifact integrity data (checksums, shasums, tarball metadata) for the ws WebSocket package or any other npm package, especially for supply chain security audits, CI/CD pipeline integrity checks, or upgrade planning workflows where verifying the published artifact against a known hash is required.

## Known failure modes

- Package name not found in npm registry — returns error or empty result
- Specified version does not exist for the package — version not found error
- Network timeout reaching npm registry — service unavailable response
- Invalid package name format — validation error
- Rate limiting or payment failure — 402 or 429 response

## How this service works

ws Published artifact integrity metadata: Published artifact integrity metadata for npm package ws. Inspect registry metadata for integration and upgrade planning. Package and version can be overridden.

## Output

Returns published artifact integrity metadata from the npm registry for the specified package (default: ws) and version, including checksums (shasum/integrity hashes), tarball URLs, publication timestamps, and registry-level metadata useful for verifying package authenticity and planning upgrades.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/npm-ws-package-artifact-integrity-metadata-d759969a/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)