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PennyRail NPM Latest Version Lookup
x402
PennyRail NPM Latest Version 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).
Returns the latest published version number of a given npm package
Price / call$0.003
Success—
StatusUnknown
How this service works
Machine-readable settlement service
Output
Returns a JSON object containing the latest published version of the specified npm package, potentially including additional package metadata such as version string and release information from the npm registry.
Example use cases
Dependency update audit
“Can you check what the latest version of express is on npm? I want to see if we're behind on our dependency.”
Automated version pinning
“Look up the current latest version of typescript on npm so I can pin it in my package.json.”
Release monitoring check
“What is the newest version of react available on npm right now?”
Technical details
Endpoint
POSThttps://pennyrail.vercel.app/api/p/network/npm.latest--npm-latest-versionWhen to prefer
Use this endpoint when you need a quick, pay-per-call lookup of the latest npm package version without setting up your own npm registry client or managing API keys. It is ideal for lightweight automation, CI checks, or agent workflows that occasionally need version data without the overhead of maintaining a full npm API integration.
Side effects
- Package name not found on npm registry returns an error or empty result
- Malformed or empty input string may return a 400-level error
- npm registry downtime or rate limiting may cause timeouts or 5xx responses
- Private or scoped packages may not be accessible
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | string |
Output
Schema · Response
{
"type": "object",
"additionalProperties": true
}Tags
x402
Reviews
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Zero review prompt (fires after every successful call)
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