Check an exact npm or PyPI package version immediately before installation using current r
Check an exact npm or PyPI package version immediately before installation using current registry, vulnerability, malicious-package, withdrawal/deprecation, and verified provenance evidence. Returns ALLOW, REVIEW, BLOCK, or UNKNOWN with machine-readable reasons.
10000 (raw units)
price
8
calls / 30d
5
unique payers
2026-09-17
updated
Provider
api.vrsai.tech · discovered, not yet claimed by its owner
Payment (x402 accepts[])
[
{
"scheme": "exact",
"network": "eip155:8453",
"payTo": "0x6746dFF7bDB1ED4940DBe50024795AD97CbA09Af",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "10000",
"maxTimeoutSeconds": 60
},
{
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "EiJRESZjUCUufSjSb5iDmikXXeKa3C1gQwYCZR4xFocj",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"amount": "10000",
"maxTimeoutSeconds": 60
}
]Output schema
{
"bazaar": {
"info": {
"input": {
"body": {
"purl": "pkg:npm/%40colors/[email protected]"
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"decision": "ALLOW",
"evidence": [
{
"attempts": 1,
"latency_ms": 120,
"observed_at": "2026-08-26T00:00:00.000Z",
"source": "npm_registry",
"status": "OK"
},
{
"attempts": 1,
"latency_ms": 240,
"observed_at": "2026-08-26T00:00:00.000Z",
"source": "osv",
"status": "OK"
},
{
"attempts": 1,
"latency_ms": 90,
"observed_at": "2026-08-26T00:00:00.000Z",
"source": "deps_dev",
"status": "OK"
}
],
"input_fingerprint": "sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
"observations": {
"deps_dev": {
"advisory_ids": [],
"canonical_name": "@colors/colors",
"canonical_version": "1.5.0",
"licenses": [
"MIT"
]
},
"evidence_complete": true,
"provenance": {
"attestation_types": [],
"expected_repository_match": "NOT_REQUESTED",
"source_repositories": [],
"verified": false
},
"registry": {
"deprecated": false,
"distribution_hashes": [],
"exists": true,
"install_scripts": [],
"integrity": "sha512-fixture-integrity",
"repository_metadata": {
"url": "https://github.com/Marak/colors.js",
"verified": false
},
"yanked": "NONE",
"yanked_reasons": []
},
"vulnerabilities": {
"families": [],
"family_count": 0,
"malicious_package_signal": false,
"max_severity": "NONE",
"raw_record_count": 0
}
},
"observed_at": "2026-08-26T00:00:00.000Z",
"package": {
"ecosystem": "npm",
"name": "@colors/colors",
"purl": "pkg:npm/%40colors/[email protected]",
"version": "1.5.0"
},
"policy_version": "balanced-2026-08-26",
"reason_codes": [
"NO_BLOCKING_SIGNAL_OBSERVED"
],
"unknowns": []
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
},
"offer-receipt": {
"info": {
"offers": [
{
"acceptIndex": 0,
"format": "jws",
"signature": "eyJhbGciOiJFUzI1NiIsImtpZCI6ImRpZDp3ZWI6dnJzYWkudGVjaCNwcm9kdWN0aW9uLTIwMjYtMDgtMTkifQ.eyJhbW91bnQiOiIxMDAwMCIsImFzc2V0IjoiMHg4MzM1ODlmQ0Q2ZURiNkUwOGY0YzdDMzJENGY3MWI1NGJkQTAyOTEzIiwibmV0d29yayI6ImVpcDE1NTo4NDUzIiwicGF5VG8iOiIweDY3NDZkRkY3YkRCMUVENDk0MERCZTUwMDI0Nzk1QUQ5N0NiQTA5QWYiLCJyZXNvdXJjZVVybCI6Imh0dHBzOi8vYXBpLnZyc2FpLnRlY2gvdjEvY2FwYWJpbGl0aWVzL3BhY2thZ2VfaW5zdGFsbF9wcmVmbGlnaHQiLCJzY2hlbWUiOiJleGFjdCIsInZhbGlkVW50aWwiOjE3ODk2MjY1NDMsInZlcnNpb24iOjF9.0zUydVQ-YQ8mXh7L3j9rYf8rDwpPPQ9Smlxd-K0VIUyF9QCHnONlV79QBHZuHPv8fZp5h8Qf5PjtGWwRGZKHGg"
},
{
"acceptIndex": 1,
"format": "jws",
"signature": "eyJhbGciOiJFUzI1NiIsImtpZCI6ImRpZDp3ZWI6dnJzYWkudGVjaCNwcm9kdWN0aW9uLTIwMjYtMDgtMTkifQ.eyJhbW91bnQiOiIxMDAwMCIsImFzc2V0IjoiRVBqRldkZDVBdWZxU1NxZU0ycU4xeHp5YmFwQzhHNHdFR0drWnd5VER0MXYiLCJuZXR3b3JrIjoic29sYW5hOjVleWt0NFVzRnY4UDhOSmRUUkVwWTF2enFLcVpLdmRwIiwicGF5VG8iOiJFaUpSRVNaalVDVXVmU2pTYjVpRG1pa1hYZUthM0MxZ1F3WUNaUjR4Rm9jaiIsInJlc291cmNlVXJsIjoiaHR0cHM6Ly9hcGkudnJzYWkudGVjaC92MS9jYXBhYmlsaXRpZXMvcGFja2FnZV9pbnN0YWxsX3ByZWZsaWdodCIsInNjaGVtZSI6ImV4YWN0IiwidmFsaWRVbnRpbCI6MTc4OTYyNjU0MywidmVyc2lvbiI6MX0.PpAvZu4MsvfXVOzK5ika3J7HR2UF5QDh-KHhEiZENSDCC0-tpSEdC6v6CvNVHdTZpsNJ3caK-6Tj5a2AbanJkA"
}
]
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"offers": {
"items": {
"properties": {
"acceptIndex": {
"type": "integer"
},
"format": {
"type": "string"
},
"payload": {
"properties": {
"amount": {
"type": "string"
},
"asset": {
"type": "string"
},
"network": {
"type": "string"
},
"payTo": {
"type": "string"
},
"resourceUrl": {
"type": "string"
},
"scheme": {
"type": "string"
},
"validUntil": {
"type": "integer"
},
"version": {
"type": "integer"
}
},
"required": [
"version",
"resourceUrl",
"scheme",
"network",
"asset",
"payTo",
"amount"
],
"type": "object"
},
"signature": {
"type": "string"
}
},
"required": [
"format",
"signature"
],
"type": "object"
},
"type": "array"
}
},
"required": [
"offers"
],
"type": "object"
}
},
"payment-identifier": {
"info": {
"required": false
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"id": {
"maxLength": 128,
"minLength": 16,
"pattern": "^[a-zA-Z0-9_-]+$",
"type": "string"
},
"required": {
"type": "boolean"
}
},
"required": [
"required"
],
"type": "object"
}
}
}Use it
curl
curl "https://api.vrsai.tech/v1/capabilities/package_install_preflight" # -> 402 Payment Required, accepts[] lists how to pay # retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid
JavaScript
const res = await fetch("https://api.vrsai.tech/v1/capabilities/package_install_preflight");
if (res.status === 402) {
const { accepts } = await res.json();
// pay one of accepts[] via an x402 client, then retry with the payment header
}Python
import httpx
res = httpx.get("https://api.vrsai.tech/v1/capabilities/package_install_preflight")
if res.status_code == 402:
accepts = res.json()["accepts"]
# pay one of accepts[] via an x402 client, then retry with the payment headerMachine-readable
Everything on this page is also available as clean JSON at /resources/7283.json, and this resource appears in /discovery/resources and /discovery/search.