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License Compatibility Checker
x402
License Compatibility Checker is a paid API for AI agents from defi-shield-hazel.vercel.app, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).
Checks npm package licenses for copyleft/restrictive conflicts by performing real npm registry lookups and detecting incompatible license combinations
Price / call$0.05
Success—
StatusUnknown
Output
Returns the license type(s) found for the specified npm package(s) via real registry lookup, along with compatibility assessment, copyleft/restrictive conflict flags, and a summary of any licensing issues detected.
Example use cases
Example prompt
“Can you check whether the npm package 'react-query' has any copyleft or restrictive license conflicts that would prevent me from using it in a closed-source commercial app?”
Technical details
Endpoint
POSThttps://defi-shield-hazel.vercel.app/api/dev/license-checkWhen to prefer
Use this endpoint when you need to programmatically verify open-source license compatibility for npm packages before including them in a project, especially to detect copyleft (GPL, AGPL, LGPL) or other restrictive licenses that could create compliance obligations in commercial or proprietary software.
Side effects
- Package not found on npm registry — returns 404 or error indicating unknown package
- Network timeout reaching npm registry — returns upstream error
- Invalid or malformed package name — returns validation error
- Package has no declared license — returns ambiguous/unlicensed flag
- Rate limit or payment failure — returns 402 or 429 error
Input
{
"input": {
"body": {
"dependencies": [
"lodash",
"axios"
],
"project_license": "MIT"
},
"type": "http",
"method": "POST",
"bodyType": "json"
}
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
{
"summary": {
"total": 2,
"unknown": 0,
"copyleft": 0,
"conflicts": 0,
"permissive": 2,
"restrictive": 0
},
"packages": [
{
"name": "axios",
"license": "MIT",
"category": "permissive",
"compatible_with_mit": true
},
{
"name": "lodash",
"license": "MIT",
"category": "permissive",
"compatible_with_mit": true
}
],
"conflicts": [],
"risk_level": "low",
"analyzed_at": "2026-06-13T04:21:50.673Z",
"project_license": "MIT",
"response_time_ms": 63
}Tags
x402
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