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npm Package Lookup
x402
npm Package Lookup is a paid API for AI agents from the-stall.intuitek.ai, paid per call via x402, $0.007/call, status unknown (last checked 2026-09-14, last successful call 2026-07-09).
Retrieves metadata and version details for a given npm package, optionally for a specific version.
Price / call$0.007
Success100%
StatusUnknown
How this service works
Node.js / JavaScript package metadata from the npm registry. Returns latest version, description, license, keywords, direct dependencies, weekly download count, publish date, GitHub repository, and all recent versions. Also supports looking up a specific version. Use before adding an npm package as a dependency: verify it's maintained, check its license, assess how many dependencies it pulls in. Free upstream: npm registry API (no key, public).
Output
Returns npm package metadata including version number, description, author, license, homepage, dependencies, and release date. For a specific version query, returns details scoped to that version. Supports scoped packages like @scope/name.
Example use cases
Example prompt
“What's the latest stable version of the 'express' npm package, and can you give me its description, license, and main dependencies?”
Technical details
Endpoint
GEThttps://the-stall.intuitek.ai/cap/npm-lookupWhen to prefer
Use this endpoint when an agent needs to resolve npm package metadata, check latest or specific versions, retrieve dependency lists, or validate package existence — particularly in keyless, accountless x402 pay-per-call contexts where no npm API token is available.
Side effects
- Package not found — returns error if the package name doesn't exist on npm registry
- Version not found — returns error if the specified version doesn't exist for the package
- Invalid package name format — malformed names may return a validation error
- Payment failure — USDC payment on Base mainnet not confirmed, request rejected with 402
Input
{
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"package": "express"
}
}
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| required | string | |
| properties | string |
Output
{
"ts": "2026-06-12T05:11:56.961Z",
"name": "express",
"author": "TJ Holowaychuk",
"engines": {
"node": ">= 18"
},
"license": "MIT",
"npm_url": "https://www.npmjs.com/package/express",
"version": "5.2.1",
"bugs_url": "https://github.com/expressjs/express/issues",
"homepage": "https://expressjs.com/",
"keywords": [
"express",
"framework",
"sinatra",
"web",
"http",
"rest",
"restful",
"router",
"app",
"api"
],
"dep_count": 28,
"dist_tags": {
"latest": "5.2.1",
"latest-4": "4.22.2"
},
"peer_deps": {},
"repository": "https://github.com/expressjs/express",
"description": "Fast, unopinionated, minimalist web framework",
"all_versions": [
"4.22.2",
"4.22.1",
"5.2.1",
"5.2.0",
"4.22.0",
"5.1.0",
"4.21.2",
"5.0.1",
"4.21.1",
"4.21.0",
"5.0.0",
"4.20.0",
"5.0.0-beta.3",
"4.19.2",
"5.0.0-beta.2",
"4.19.1",
"4.19.0",
"4.18.3",
"4.18.2",
"4.18.1"
],
"dependencies": {
"qs": "^6.14.0",
"depd": "^2.0.0",
"etag": "^1.8.1",
"once": "^1.4.0",
"send": "^1.1.0",
"vary": "^1.1.2",
"debug": "^4.4.0",
"fresh": "^2.0.0",
"cookie": "^0.7.1",
"router": "^2.2.0",
"accepts": "^2.0.0",
"type-is": "^2.0.1",
"parseurl": "^1.3.3",
"statuses": "^2.0.1",
"encodeurl": "^2.0.0",
"mime-types": "^3.0.0",
"proxy-addr": "^2.0.7",
"body-parser": "^2.2.1",
"escape-html": "^1.0.3",
"http-errors": "^2.0.0",
"on-finished": "^2.4.1",
"content-type": "^1.0.5",
"finalhandler": "^2.1.0",
"range-parser": "^1.2.1",
"serve-static": "^2.2.0",
"cookie-signature": "^1.2.1",
"merge-descriptors": "^2.0.0",
"content-disposition": "^1.0.0"
},
"latest_publish": "2025-12-01T20:49:43.268Z"
}Tags
x402
Reviews
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Zero review prompt (fires after every successful call)
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