Skip to main content
GET
/
v1
/
classifications
List Classifications
curl --request GET \
  --url https://api.signa.so/v1/classifications \
  --header 'Authorization: Bearer <token>'
{
  "object": "list",
  "data": [
    {
      "class_number": 9,
      "object": "classification",
      "title": "Scientific, research, navigation, surveying, photographic, cinematographic, audiovisual, optical, weighing, measuring, signalling, detecting, testing, inspecting, life-saving and teaching apparatus and instruments; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling the distribution or use of electricity; apparatus and instruments for recording, transmitting, reproducing or processing sound, images or data; recorded and downloadable media, computer software, blank digital or analogue recording and storage media",
      "description": "Scientific, research, navigation, surveying, photographic, cinematographic, audiovisual, optical, weighing, measuring, signalling, detecting, testing, inspecting, life-saving and teaching apparatus and instruments; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling the distribution or use of electricity; apparatus and instruments for recording, transmitting, reproducing or processing sound, images or data; recorded and downloadable media, computer software, blank digital or analogue recording and storage media.",
      "category": "goods"
    },
    {
      "class_number": 35,
      "object": "classification",
      "title": "Advertising; business management, organization and administration; office functions",
      "description": "Advertising; business management, organization and administration; office functions.",
      "category": "services"
    }
  ],
  "has_more": false,
  "pagination": {
    "cursor": null
  },
  "request_id": "req_qJ6aB2cD"
}

Documentation Index

Fetch the complete documentation index at: https://docs.signa.so/llms.txt

Use this file to discover all available pages before exploring further.

Overview

Returns the complete Nice Classification system used to categorize goods and services in trademark applications. Each class includes its number, title, and description. The Nice Classification is maintained by WIPO and updated annually; Signa always reflects the current edition. This reference endpoint is useful for building class pickers, validating user input, and displaying human-readable class descriptions alongside trademark data.

Query Parameters

type
string
Filter by classification type: goods (classes 1-34) or services (classes 35-45)

Response

data
object[]
{
  "object": "list",
  "data": [
    {
      "class_number": 9,
      "object": "classification",
      "title": "Scientific, research, navigation, surveying, photographic, cinematographic, audiovisual, optical, weighing, measuring, signalling, detecting, testing, inspecting, life-saving and teaching apparatus and instruments; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling the distribution or use of electricity; apparatus and instruments for recording, transmitting, reproducing or processing sound, images or data; recorded and downloadable media, computer software, blank digital or analogue recording and storage media",
      "description": "Scientific, research, navigation, surveying, photographic, cinematographic, audiovisual, optical, weighing, measuring, signalling, detecting, testing, inspecting, life-saving and teaching apparatus and instruments; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling the distribution or use of electricity; apparatus and instruments for recording, transmitting, reproducing or processing sound, images or data; recorded and downloadable media, computer software, blank digital or analogue recording and storage media.",
      "category": "goods"
    },
    {
      "class_number": 35,
      "object": "classification",
      "title": "Advertising; business management, organization and administration; office functions",
      "description": "Advertising; business management, organization and administration; office functions.",
      "category": "services"
    }
  ],
  "has_more": false,
  "pagination": {
    "cursor": null
  },
  "request_id": "req_qJ6aB2cD"
}

Code Examples

curl "https://api.signa.so/v1/classifications?type=services" \
  -H "Authorization: Bearer sig_xxxxxxxxxxxx"

Errors

StatusTypeDescription
400validation_errorInvalid type parameter
401unauthorizedMissing or invalid API key
429rate_limitedToo many requests