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"
}

GET

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"
}

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 "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

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

List Opposition Rules Get Classification

Overview

Trademarks

Parties

Monitoring

Reference

Administration

Operational

List Classifications

Overview

Query Parameters

Response

Code Examples

Errors

Overview

Trademarks

Parties

Monitoring

Reference

Administration

Operational

Documentation Index

​Overview

​Query Parameters

​Response

​Code Examples

​Errors

​Related Endpoints

Overview

Query Parameters

Response

Code Examples

Errors

Related Endpoints