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SALT19 NPM Package Facts
x402
SALT19 NPM Package Facts is a paid API for AI agents from api.salt19.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).
Retrieves key metadata facts about an NPM package — including license, version, and deprecation status — for a given package name and optional version.
Price / call$0.01
Success—
StatusUnknown
How this service works
SALT19 is an independent applied AI systems lab behind EvoMind governed cognition, the MCP-native Agent Utility Grid, the ARCS research community, AeroClear UAS flight intelligence, and practical software for real-world work.
Output
Returns a JSON object containing the package name, resolved version string, SPDX license identifier (e.g. 'MIT'), and a boolean deprecated flag indicating whether the package has been marked as deprecated on the npm registry.
Example use cases
License compliance check for dependency
“I need to verify the license for the npm package 'lodash' at version 4.17.21 before we add it to our commercial project — can you check if it's MIT or something more restrictive?”
Deprecation audit before installing
“Before I install 'request' from npm, can you check whether it's been deprecated and what license it carries?”
Automated package metadata enrichment
“Can you pull the facts for the npm package 'express' — I need the current version, its license type, and whether it's still active and not deprecated?”
Technical details
Endpoint
POSThttps://api.salt19.com/v1/npm-package-factsWhen to prefer
Choose this endpoint when an agent needs quick, structured facts about a specific npm package — particularly license type and deprecation status — without scraping the npm website. Useful for automated dependency audits, license compliance pipelines, or enriching package manifests. Prefer over raw npm registry API calls when a pay-per-use, agent-friendly endpoint with a clean response schema is preferred.
Side effects
- Package name not found on npm registry — returns error or empty result
- Invalid or malformed package name (too long or empty) — rejected by input schema validation
- Requested version does not exist for the package — may return error or null version
- Network or upstream npm registry unavailability — timeout or 5xx error
- Payment failure via x402 protocol — request not processed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| package | string | |
| version | string |
Output
Schema · Response
{
"type": "json",
"example": {
"license": "MIT",
"package": "hono",
"version": "4.13.3",
"deprecated": false
}
}Tags
x402
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Zero review prompt (fires after every successful call)
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