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pkg-preflight
x402
pkg-preflight is a paid API for AI agents from payai.agentstools.dev, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-11).
Checks npm or PyPI package names for typosquatting and supply-chain risk, returning a safety verdict and nearest legitimate package match.
Price / call$0.03
Success—
StatusUnknown
How this service works
Install-safety preflight for one dependency BEFORE pip install / npm i. Returns a safe / caution / block verdict fusing existence, OSV malware flags, typosquat distance to a popular package, a known-hallucination corpus, and freshness metadata. Supply-chain indicators, not a guarantee.
Output
Returns a safety verdict (e.g. safe, suspicious, or flagged), the nearest popular legitimate package name, and basic supply-chain risk indicators such as typosquatting distance and any known red flags for the queried package name.
Example use cases
CI pipeline dependency safety gate
“We're about to merge a PR that adds 'colurama' as a PyPI dependency — can you screen it for typosquatting or supply-chain risk before it lands?”
Audit suspicious npm package in logs
“Our SIEM flagged an install of 'lodahs' from npm — can you check if that's a typosquatted version of a popular package and tell me what the nearest legitimate package would be?”
Developer vetting new open-source library
“I found a Python package called 'boto3s' on PyPI — is it a legitimate library or could it be a typosquatting attack against boto3?”
Technical details
Endpoint
GEThttps://payai.agentstools.dev/pkg/preflight?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a fast, pre-install safety screen of a package name before adding it as a dependency, especially in automated CI/CD pipelines or agent workflows that install open-source packages. Prefer it over manual searches when you need a programmatic verdict with a nearest-match comparison rather than just a raw search result.
Side effects
- Unknown ecosystem value returns a validation error — use 'npm' or 'pypi' exactly
- Package name not found in any known registry returns a not-found or inconclusive verdict
- Very new or obscure legitimate packages may lack enough signals and return an inconclusive result
- Rate limiting or payment failure (x402) returns a 402 Payment Required response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
Reviews
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Zero review prompt (fires after every successful call)
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