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Stack Facts License Compatibility Check
x402
Stack Facts License Compatibility Check is a paid API for AI agents from g5joilnmeep4ntz3nwezxt5dmu.srv.us, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-19).
Checks whether open-source package licenses are compatible with a project's license and intended use case (distribute, SaaS, or internal), returning verdicts and obligations per package.
Price / call$0.003
Success—
StatusUnknown
How this service works
Check a package before install: malware, known vulnerabilities (OSV), exploited CVEs (CISA KEV) and end-of-life, plus LLM prices; signed answers, pay per call in USDC, no account or API key.
Output
Returns a per-package verdict (compatible/incompatible/unknown), the normalized license identifier chosen, license class (permissive/copyleft/etc.), obligations (e.g. keep copyright notices), and a project-level summary with counts of compatible, incompatible, and unknown items. Also includes metadata about dataset freshness, SPDX list version, and rules version.
Example use cases
Pre-release license compliance audit
“I'm about to release my Apache-2.0 SaaS product. Can you check whether these dependencies — react (MIT), moment (MIT), and ffmpeg (GPL-2.0) — are compatible with my project license for SaaS distribution?”
Internal tooling legal check
“We're building an internal tool at work and want to use some open-source packages. Check if lodash (MIT), chalk (ISC), and a GPL-3.0 library are okay to use for internal use only under our MIT project license.”
Open source project dependency vetting
“For my new open-source project licensed under BSD-2-Clause that I'm distributing publicly, can you validate whether these packages are license-compatible: axios (MIT), webpack (MIT), and node-sass (MIT)?”
Technical details
Endpoint
POSThttps://g5joilnmeep4ntz3nwezxt5dmu.srv.us/v1/license/check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need automated, per-call license compatibility checking without setting up an account or API key, especially in agent workflows that process dependency lists before install or release. It's ideal for pay-as-you-go compliance checks that need to distinguish between distribute, SaaS, and internal use cases, with signed responses for auditability.
Side effects
- Unknown or unrecognized license identifiers return 'unknown' verdict with no obligations
- More than 20 items in the items array will be rejected by schema validation
- Malformed PURL strings may cause item-level errors
- Payment in USDC not received causes 402 response and no data returned
- Ambiguous package names without ecosystem context may return incorrect license data
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| use | string | |
| items | array | |
| project_license | string |
Output
Schema · Response
{
"type": "json",
"example": {
"data": {
"project": {
"use": "distribute",
"class": "permissive",
"license": "Apache-2.0"
},
"results": [
{
"class": "permissive",
"input": "MIT",
"chosen": "MIT",
"licence": {},
"package": null,
"reasons": [],
"verdict": "compatible",
"obligations": [
"Keep the copyright and licence …"
]
}
],
"summary": {
"items": 3,
"unknown": 0,
"compatible": 2,
"conditions": 0,
"incompatible": 1
},
"verdict": "incompatible"
},
"meta": {
"stale": false,
"notice": "Normalised (modified) from the …",
"dataset": "license",
"licences": "/licences",
"attribution": "Licence ids and names from the …",
"rules_version": "2026-10-12",
"spdx_list_version": "3.29.0"
}
}
}Tags
x402
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