openapi: 3.1.0
info:
  title: Chuck Norris Categories Jokes API
  description: 'Free JSON REST API for hand-curated Chuck Norris facts maintained by

    @matchilling. Supports random retrieval, category filtering, full-text

    search, and direct lookup by joke identifier. No authentication is required

    and there are no documented rate limits.

    '
  version: 1.0.0
  contact:
    name: Mathias Schilling
    url: https://github.com/chucknorris-io
    email: cn-jokes-api@chucknorris.io
  license:
    name: GPL-3.0
    url: https://www.gnu.org/licenses/gpl-3.0.en.html
  termsOfService: https://api.chucknorris.io/
servers:
- url: https://api.chucknorris.io
  description: Production
tags:
- name: Jokes
  description: Chuck Norris jokes (facts) endpoints.
paths:
  /jokes/random:
    get:
      operationId: getRandomJoke
      summary: Get Random Joke
      description: 'Retrieve a single random Chuck Norris joke. Optionally constrain the

        random selection to a specific category by passing the `category` query

        parameter (must be one of the values returned by `/jokes/categories`).

        '
      tags:
      - Jokes
      parameters:
      - name: category
        in: query
        required: false
        description: Restrict the random selection to a single category.
        schema:
          type: string
          example: dev
      responses:
        '200':
          description: A random Chuck Norris joke.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Joke'
              examples:
                random:
                  $ref: '#/components/examples/JokeRandom'
            text/plain:
              schema:
                type: string
                description: Plain-text joke value (when Accept is text/plain).
        '404':
          description: Unknown category.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
  /jokes/{id}:
    get:
      operationId: getJokeById
      summary: Get Joke By Id
      description: Retrieve a single joke by its 22-character identifier.
      tags:
      - Jokes
      parameters:
      - name: id
        in: path
        required: true
        description: Joke identifier as returned by other endpoints.
        schema:
          type: string
          example: Yke6bi5xSdWvSq_dkCCGkA
      responses:
        '200':
          description: The requested joke.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Joke'
              examples:
                byId:
                  $ref: '#/components/examples/JokeById'
        '404':
          description: Joke not found for the supplied identifier.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
components:
  schemas:
    Joke:
      type: object
      description: A single Chuck Norris joke (fact).
      required:
      - categories
      - created_at
      - icon_url
      - id
      - updated_at
      - url
      - value
      properties:
        categories:
          type: array
          description: Categories this joke belongs to (empty when uncategorized).
          items:
            type: string
        created_at:
          type: string
          description: Timestamp the joke was created (UTC, ISO-like format).
          example: '2020-01-05 13:42:25.099703'
        icon_url:
          type: string
          format: uri
          description: URL to the Chuck Norris avatar image.
          example: https://api.chucknorris.io/img/avatar/chuck-norris.png
        id:
          type: string
          description: Stable identifier for the joke.
          example: Yke6bi5xSdWvSq_dkCCGkA
        updated_at:
          type: string
          description: Timestamp the joke was last updated.
          example: '2020-01-05 13:42:25.099703'
        url:
          type: string
          description: Canonical URL for the joke on chucknorris.io.
        value:
          type: string
          description: The Chuck Norris fact text.
          example: Chuck Norris can see around corners.
    Error:
      type: object
      description: Error envelope returned by the API.
      properties:
        timestamp:
          type: string
          format: date-time
          example: '2026-05-30T23:16:45.026Z'
        status:
          type: integer
          example: 404
        error:
          type: string
          example: Not Found
        path:
          type: string
          example: /jokes/missing
  examples:
    JokeRandom:
      summary: Random joke response
      value:
        categories: []
        created_at: '2020-01-05 13:42:25.099703'
        icon_url: https://api.chucknorris.io/img/avatar/chuck-norris.png
        id: GPGW82o1R8m3KhiKmKlpJA
        updated_at: '2020-01-05 13:42:25.099703'
        url: https://api.chucknorris.io/jokes/GPGW82o1R8m3KhiKmKlpJA
        value: Chuck Norris can see around corners.
    JokeById:
      summary: Joke lookup by id
      value:
        categories:
        - dev
        created_at: '2020-01-05 13:42:25.099703'
        icon_url: https://api.chucknorris.io/img/avatar/chuck-norris.png
        id: Yke6bi5xSdWvSq_dkCCGkA
        updated_at: '2020-01-05 13:42:25.099703'
        url: https://api.chucknorris.io/jokes/Yke6bi5xSdWvSq_dkCCGkA
        value: Chuck Norris's code compiles before he writes it.