Free APIKnowledgeNo keyOfficial
Open Trivia Database (OpenTDB)
Thousands of verified, categorized trivia questions and answers as JSON, no key
The Open Trivia Database is a free, user-contributed bank of verified multiple-choice and true/false trivia questions across many categories and difficulties. The JSON API returns questions with the correct answer, distractors, category and difficulty, plus session tokens to avoid repeats. No authentication is needed.
Free tier
Free, no key. Data is CC BY-SA 4.0Rate limits
One request per IP every 5 secondsAuth
No keyBase URL
https://opentdb.comWhat you'd build with it
- Build a quiz game or trivia bot
- Generate evaluation questions for a learning automation
- Seed a study-flashcard app with categorized Q&A
- Add an icebreaker trivia feature to a community product
Key endpoints
- GET
/api.php?amount={n}Fetch n random questions (filter by category/difficulty/type) - GET
/api_category.phpList all available categories and IDs - GET
/api_token.php?command=requestGet a session token so questions never repeat
Members
Members get the runnable recipe
Sign in free to copy the example request, see a sample response, and read the gotchas.
Tags
knowledgetriviaquizgamesreference