# npm Package Search via x402

> npm Package Search via x402 is a paid API for AI agents from workspace-x402-paywall.onrender.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-11).

Searches the npm registry for packages matching a query string, returning relevant package metadata, for $0.005 USDC per call via x402 micropayment.

## Facts

- Endpoint: GET https://workspace-x402-paywall.onrender.com/search/npm?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/npm-package-search-via-x402-75f3f653
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_l3Dh04Ivn5tL8lG_ltu7m

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-package-search-via-x402-75f3f653
```

Example prompt: Search npm for packages related to 'JWT authentication' and show me the top results.

## When to prefer this

Choose this endpoint when you need to search the npm registry for JavaScript/Node.js packages by keyword or name, especially in an agent workflow that supports x402 micropayments on Base or Solana. Prefer this over scraping npmjs.com directly or using the full npm CLI, as it provides a clean, pay-per-call API at $0.005 USDC with no subscription required.

## Known failure modes

- Missing required 'q' parameter returns an error
- Empty or too-generic query may return irrelevant results
- Payment not provided or rejected by x402 paywall returns 402 Payment Required
- npm registry upstream unavailable causes 502/503
- Rate limiting if too many requests are made in quick succession

## How this service works

66 pay-per-call APIs: AI text/image generation ($0.01), Polymarket odds, crypto prices, DeFi yields, FX rates, weather, IP/geo, FBI wanted, SEC tickers, clinical trials, 250M academic papers, Stack Overflow, meme-coin launchpads (pump.fun, Clanker, Four.meme, SunPump), tokenized stocks, Solana top 100, and 40+ more. $0.005/call standard. USDC on Base and Solana via x402.

## Output

Returns a JSON object containing npm search results for the given query, likely including package names, descriptions, version numbers, download counts, and other registry metadata for matching packages.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/npm-package-search-via-x402-75f3f653/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from workspace-x402-paywall.onrender.com](https://www.zero.xyz/host/workspace-x402-paywall.onrender.com/llms.txt)