List Classifications

List all Nice classification classes with descriptions

GET /v1/classifications

List Classifications

cURL

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"
}

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[]

Show Classification object

class_number · integer

Nice class number (1-45)

title · string

Official Nice class heading — the full title string published by WIPO, typically a comma/semicolon-separated list of the kinds of goods or services the class covers

category · string

goods (classes 1-34) or services (classes 35-45)

description · string

Full Nice class scope description

{
  "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

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

Errors

Status	Type	Description
400	validation_error	Invalid type parameter
401	unauthorized	Missing or invalid API key
429	rate_limited	Too many requests

Related Endpoints

• Get Classification — single class detail
• Suggest Classifications — AI-assisted class suggestion from a description
• Suggest Goods & Services — draft filing-ready wording per class
• List Goods & Services — browse/search the pre-approved term catalog
• List Trademarks — filter or search by Nice class