---
title: "Look up a Cooperative Patent Classification (CPC) symbol"
method: GET
path: "/googlepatents/classification"
tags: ["Google Patents"]
---

# Look up a Cooperative Patent Classification (CPC) symbol

`GET /googlepatents/classification`

## Request

- Base URL: `https://api.crawlora.net/api/v1`
- URL: `https://api.crawlora.net/api/v1/googlepatents/classification`
- Auth: API key in header `x-api-key`

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.

## Query parameters

- `code` string, required

## Headers

- `x-api-key` string, required

## Response `200`

OK

- GooglepatentsClassificationResponseDoc
  - `code` integer
  - `data` GooglepatentsClassificationResponse
    - `code` string
    - `description` string[]
    - `fetched_at` string
    - `name` string
    - `relations` GooglepatentsClassificationRelation[]
      - `code` string
      - `description` string
      - `is_child` boolean
      - `is_parent` boolean
      - `is_related` boolean
      - `name` string
    - `source_url` string
  - `msg` string

## Other responses

- `400`: Bad Request
- `404`: Not Found
- `429`: Too Many Requests
- `500`: Internal Server Error
- `503`: Service Unavailable

---

[API](https://skmtc.dev/crawlora/apis/crawlora-api.md) · [All operations](https://skmtc.dev/crawlora/apis/crawlora-api/llms.txt) · [OpenAPI document](https://skmtc.dev/crawlora/apis/crawlora-api/revisions/028417aa35bb?raw)