Validate an SPDX license expression (AND, OR, WITH, +)
Validate an SPDX license expression (AND, OR, WITH, +): syntax, known ids, known exceptions and deprecated identifiers.
Answers HTTP 429 without x402 payment termsour last check, 2026-10-21
0 of 1checks answered this week
n/amedian answer time
$0.03listed price per call
n/aprice it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://license-intel.x402tookit.com/license-expression-check
| Category | Everything else |
|---|---|
| Provider host | license-intel.x402tookit.com |
| Networks | eip155:137, eip155:42161, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-21 | no x402 terms | 429 | 379 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"expression": "GPL-2.0-or-later WITH Classpath-exception-2.0 OR MIT"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"expression": {
"description": "An SPDX expression, for example MIT OR (Apache-2.0 AND BSD-3-Clause)",
"type": "string"
}
},
"required": [
"expression"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"asOf": {
"type": [
"null",
"string"
]
},
"attribution": {
"type": [
"null",
"string"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"exceptions": {
"items": {
"properties": {
"canonicalId": {
"type": [
"null",
"string"
]
},
"id": {
"type": [
"null",
"string"
]
},
"name": {
"type": [
"null",
"string"
]
},
"status": {
"type": [
"null",
"string"
]
}
},
"type": "object"
},
"type": [
"array",
"null"
]
},
"expression": {
"type": [
"null",
"string"
]
},
"licenses": {
"items": {
"properties": {
"canonicalId": {
"type": [
"null",
"string"
]
},
"id": {
"type": [
"null",
"string"
]
},
"name": {
"type": [
"null",
"string"
]
},
"osiApproved": {
"type": [
"boolean",
"null"
]
},
"plusOnDeprecated": {
"type": [
"boolean",
"null"
]
},
"status": {
"type": [
"null",
"string"
]
}
},
"type": "object"
},
"type": [
"array",
"null"
]
},
"listVersion": {
"type": [
"null",
"string"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"operators": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"source": {
"type": [
"null",
"string"
]
},
"sourceUrl": {
"type": [
"null",
"string"
]
},
"summary": {
"type": [
"null",
"string"
]
},
"verdict": {
"type": [
"null",
"string"
]
},
"warnings": {
"type": [
"array",
"null"
]
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}