Endpoint Playground
Returns a CPC classification symbol's official title, its position in the classification tree (parent/child symbols), related symbols, and its full scope-note description. Accepts a symbol at any level, e.g. a section ("A"), a class ("A61"), a subclass ("A61K"), or a full group/subgroup ("A61K31/00"). Public data, sourced from Google Patents' own search API.
14 Oct 2026: 41 relations; 2 fields had a value in every checked item and 4 varied between items.
Sample value profiles: name: “A - HUMAN NECESSITIES” and 40 other values; is_parent: true in 2 of 2; is_child: true in 22 of 22.
curl 'https://api.crawlora.net/api/v1/googlepatents/classification?code=A61K31%2F00' \
-H "x-api-key: $CRAWLORA_API_KEY"| Parameter | Type | Required | Prefilled value | Description |
|---|---|---|---|---|
| code | string | Yes | A61K31/00 | CPC classification symbol |
{
"code": 200,
"msg": "OK",
"data": {
"code": "A61K",
"name": "A61K - PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES",
"relations": [
{
"code": "A",
"name": "A - HUMAN NECESSITIES",
"is_parent": true
},
{
"code": "A61",
"name": "A61 - MEDICAL OR VETERINARY SCIENCE; HYGIENE",
"is_parent": true
},
{
"code": "A61K31/00",
"name": "A61K31/00 - Medicinal preparations containing organic active ingredients",
"is_child": true
}
],
"description": [
"Compositions which are:",
"Used for medicinal purposes, e.g. drugs, biological compositions..."
],
"source_url": "https://patents.google.com/xhr/concept?context=wizard&id=A61K",
"fetched_at": "2026-08-15T20:00:00Z"
}
}The sample response, schema and code snippets below work without an account. Sending a live request needs an API key.