openapi: 3.0.3
info:
  title: Open Trivia Database Categories Statistics API
  version: '1.0'
  description: 'The Open Trivia Database (OpenTDB) is a free, user-contributed trivia

    question database operated by Pixeltail Games LLC. This OpenAPI specification

    describes the public JSON REST API exposed at https://opentdb.com.


    The API supports five endpoints:

    - /api.php — retrieve a batch of trivia questions

    - /api_category.php — list all categories and their IDs

    - /api_count.php — get question counts per category broken down by difficulty

    - /api_count_global.php — return global database statistics

    - /api_token.php — request, reset, or recycle a session token


    All endpoints return JSON. The API enforces a documented rate limit of one

    request per IP every five seconds (HTTP 429). Questions are licensed under

    Creative Commons Attribution-ShareAlike 4.0 International.

    '
  contact:
    name: Open Trivia Database (Pixeltail Games)
    url: https://opentdb.com/contact.php
  license:
    name: CC BY-SA 4.0
    url: https://creativecommons.org/licenses/by-sa/4.0/
  termsOfService: https://opentdb.com/terms.php
  x-generated-from: documentation
  x-last-validated: '2026-05-30'
servers:
- url: https://opentdb.com
  description: Open Trivia Database production endpoint
security: []
tags:
- name: Statistics
  description: Operations for inspecting overall database statistics.
paths:
  /api_count_global.php:
    get:
      operationId: getGlobalCount
      summary: Open Trivia Get Global Question Count
      description: Return overall question counts for the Open Trivia Database — total questions, pending submissions, verified questions, and rejected submissions — both globally and per category.
      tags:
      - Statistics
      responses:
        '200':
          description: Global database statistics broken down per category.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/GlobalCountResponse'
              examples:
                globalStats:
                  summary: Global statistics snapshot
                  value:
                    overall:
                      total_num_of_questions: 21531
                      total_num_of_pending_questions: 10828
                      total_num_of_verified_questions: 5296
                      total_num_of_rejected_questions: 5424
                    categories:
                      '9':
                        total_num_of_questions: 469
                        total_num_of_pending_questions: 200
                        total_num_of_verified_questions: 215
                        total_num_of_rejected_questions: 54
                      '17':
                        total_num_of_questions: 230
                        total_num_of_pending_questions: 110
                        total_num_of_verified_questions: 95
                        total_num_of_rejected_questions: 25
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
      x-microcks-default: globalStats
components:
  schemas:
    GlobalCountResponse:
      type: object
      description: Response returned by /api_count_global.php.
      required:
      - overall
      - categories
      properties:
        overall:
          $ref: '#/components/schemas/GlobalCounts'
        categories:
          type: object
          description: Per-category breakdown keyed by numeric category identifier as a string. Each value uses the same shape as the `overall` block.
          additionalProperties:
            $ref: '#/components/schemas/GlobalCounts'
    GlobalCounts:
      type: object
      description: Aggregate question counts at either the global or per-category level.
      required:
      - total_num_of_questions
      - total_num_of_pending_questions
      - total_num_of_verified_questions
      - total_num_of_rejected_questions
      properties:
        total_num_of_questions:
          type: integer
          description: Total number of questions in this scope, regardless of moderation state.
          example: 21531
        total_num_of_pending_questions:
          type: integer
          description: Questions submitted but not yet reviewed by moderators.
          example: 10828
        total_num_of_verified_questions:
          type: integer
          description: Questions reviewed and approved by moderators (served by /api.php).
          example: 5296
        total_num_of_rejected_questions:
          type: integer
          description: Questions reviewed and rejected by moderators.
          example: 5424