# koa npm Package Artifact Integrity Metadata

> koa npm 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).

Returns published artifact integrity metadata (checksums, signatures, registry info) for the koa npm package to support integration and upgrade planning.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/signal-npm-koa-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/koa-npm-package-artifact-integrity-metadata-3f55b6a8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ywvhzTSFZQsOUGMmE9Iuv

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 koa-npm-package-artifact-integrity-metadata-3f55b6a8 -d '<json body>'
```

Example prompt: Can you pull the published artifact integrity metadata for the koa npm package version 2.14.2 so I can verify its checksums before upgrading?

## When to prefer this

Use this endpoint when you need a quick, low-cost ($0.01) lookup of artifact integrity data for the koa npm package specifically — ideal for CI/CD pipelines, security audits, or upgrade planning scripts that need checksums or registry metadata without setting up direct npm registry access.

## Known failure modes

- Unknown or misspelled package name returns an error or empty result
- Requested version does not exist in the npm registry
- Registry connectivity issues cause timeout or 5xx error
- Invalid version string format may return a validation error

## How this service works

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

## Output

Returns registry-sourced artifact integrity metadata for the specified koa npm package version, including checksums (shasum, integrity hashes), tarball URLs, publish timestamps, and other registry metadata useful for verifying package authenticity and planning upgrades.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/koa-npm-package-artifact-integrity-metadata-3f55b6a8/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)