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PennyRail npm Package Info Lookup
x402
PennyRail npm Package Info Lookup is a paid API for AI agents from pennyrail.vercel.app, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-14).
Fetches the latest metadata for an npm package by name via a paid settlement endpoint
Price / call$0.003
Success—
StatusUnknown
How this service works
Machine-readable settlement service
Output
Returns a JSON object containing npm registry metadata for the specified package, including its latest version number, description, author, license type, dependencies, repository URL, and other registry fields.
Example use cases
Check latest package version
“What's the current version of the 'axios' npm package? I want to know if we're behind on our dependency.”
Retrieve package license info
“Can you pull up the npm metadata for 'express' and tell me what license it uses? I need to check if it's compatible with our project.”
Inspect package author and repo
“Look up the npm package info for 'chalk' — I need the author name and the GitHub repository URL.”
Technical details
Endpoint
POSThttps://pennyrail.vercel.app/api/p/network/npm.latest--npm-package-infoWhen to prefer
Choose this endpoint when an AI agent needs programmatic, pay-per-call access to npm package metadata without managing npm registry API keys or rate limits. It is well-suited for agents that occasionally need to resolve package information as part of a larger workflow, such as auditing dependencies, checking licenses, or verifying package existence, and that prefer a metered USDC micropayment model over subscription-based access.
Side effects
- Package name not found in npm registry — returns an error or empty result
- Invalid or empty input string — may return a validation error
- npm registry upstream unavailable — potential timeout or 5xx error
- Payment settlement failure via x402 — request not processed
- Malformed input object missing the required 'input' field — returns 400-level error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | string |
Output
Schema · Response
{
"type": "object",
"additionalProperties": true
}Tags
x402
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