quizbase
Translation-first architecture

Multilingual trivia API
for modern developers

{totalQuestionsLabel} questions from 12 open datasets, blended and deduped. English and Polish today, more on request. OpenAPI 3.1, TypeScript SDK, MCP server for Claude/Cursor.

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Free tier · No credit card · 500 requests/day, full API

Request

curl -H "X-API-Key: qb_pk_YOUR_KEY" \
  "https://quizbase.runriva.com/api/v1/questions/random?amount=1&lang=pl"

One request, one JSON object, ready for your app.

Response type: multiple
{
  "id": "019dc5f6-4a57-7e29-8c43-6370483b8d32",
  "type": "multiple",
  "difficulty": "medium",
  "language": "en",
  "category": "books",
  "question": "Which book in \"The Hunger Games\" series was released in 2010?",
  "correctAnswer": "Mockingjay",
  "incorrectAnswers": [
    "The Hunger Games",
    "Catching Fire",
    "The Ballad of Songbirds and Snakes"
  ],
  "subcategories": [
    {
      "slug": "young-adult-fiction",
      "label": "Young Adult Fiction"
    },
    {
      "slug": "dystopian-novels",
      "label": "Dystopian Novels"
    },
    {
      "slug": "science-fiction-literature",
      "label": "Science Fiction"
    },
    {
      "slug": "21st-century-books",
      "label": "21st Century Books"
    },
    {
      "slug": "series-publishing",
      "label": "Series Publishing"
    }
  ],
  "tags": [
    {
      "slug": "mockingjay",
      "label": "Mockingjay"
    },
    {
      "slug": "suzanne-collins",
      "label": "Suzanne Collins"
    },
    {
      "slug": "katniss-everdeen",
      "label": "Katniss Everdeen"
    },
    {
      "slug": "ya-literature",
      "label": "Young Adult Fiction"
    },
    {
      "slug": "hunger-games",
      "label": "Hunger Games"
    }
  ],
  "attribution": {
    "author": "Amazon Science (Mintaka)",
    "source": "mintaka",
    "license": "CC-BY-4.0",
    "licenseVersion": "4.0",
    "licenseUrl": "https://creativecommons.org/licenses/by/4.0/",
    "url": "https://github.com/amazon-science/mintaka",
    "modifications": [
      "refined_text",
      "quizified"
    ],
    "lastModified": "2026-05-21T09:11:44.531Z"
  }
}

Every question ships with license, author, and source.

QuizBase by the numbers

Questions
0
Languages
0
Categories
0
Subcategories
0
Tags
0
Topics
0

Last updated 9 days ago · Refreshed when content changes. API serves the full set in real time.

Why QuizBase

Multilingual-first

Polish and English on day one. Every question carries a canonical ID so translations stay linked across languages.

Filter that fits your game

Combine category, 5-level LLM-calibrated difficulty (`trivial` to `expert`), type, tags, subcategories, regions, and `?quality=high` in a single query. AND-composable, server-side, no client-side post-filtering.

Topic-aware

2.2K+ curated topics group identical concepts across translations and synonyms — pull "World War II" or "Druga wojna światowa" through the same handle.

Open & attributed

Source data under open licenses (CC-BY-SA, CC-BY, MIT). Full attribution preserved on every API response. Per-source BY-SA dumps published for share-alike compliance.

Performance

Steady under production load

Measured on production with k6 from an EU client. p95 under 500ms across the public surface, sustained at 50 RPS with zero errors over 1,575 requests. Numbers are real, methodology open.

See full benchmark methodology
Endpointp50p95RPS sustained
Public discovery (categories, stats, topics)22ms101ms50
Browse /v1/questions65ms143ms50
Random /v1/questions/random342ms571ms50

Last measured 2026-05-27 — 50 RPS sustained for 5 min, 0% errors (15,002 requests). Client-side over the public internet.

By category

Top eight — the rest under "Other".

  • History 133,034
  • Geography 132,147
  • Music 131,462
  • Celebrities 128,813
  • Film 117,804
  • Sports 105,577
  • Books 77,645
  • Television 57,521
  • Other 289,453

By language

English and Polish at launch — full per-language counts.

  • pl flag PL
    587,055 50.0%
  • en flag EN
    586,401 50.0%

By difficulty

Five levels calibrated by an LLM that sees the question with its distractor set — "Hard" means hard for a player, not hard for whoever typed it in. Filter via `?difficulty=hard` or skip rated with `?difficulty=any`.

  • Trivial
    55,604 4.7%
  • Easy
    180,409 15.4%
  • Medium
    245,370 20.9%
  • Hard
    370,489 31.6%
  • Expert
    321,584 27.4%

Regions

Cultural affinity, not geography

Top regions weighted by where each question lands culturally.

A region code on a question is not the country it is about — it is where someone is statistically more likely to know the answer. "Who painted the Mona Lisa?" carries `fr`, `it`, `gb`, `us` (cultural reach), not just `it` (where the painting hangs).

How to use this →

Use this to bias rounds toward an audience without locking content to a single country: pick a region code and you get questions that resonate with that culture, not just questions filed under that country.

  • us flag United States
    280,032 56.2%
  • gb flag United Kingdom
    82,204 16.5%
  • de flag Germany
    22,611 4.5%
  • fr flag France
    22,210 4.5%
  • ca flag Canada
    18,683 3.7%
  • jp flag Japan
    17,794 3.6%
  • it flag Italy
    12,643 2.5%
  • in flag India
    11,529 2.3%
  • au flag Australia
    11,209 2.2%
  • ru flag Russia
    6,858 1.4%
  • cn flag China
    6,352 1.3%
  • es flag Spain
    6,113 1.2%

Of which graded high-quality

Pass `?quality=high` to get questions that cleared distractor validation and content grading. One filter, no surprises — here is what you get.

Sample response ?quality=high

What is the capital of Australia?

Single correct answer (Canberra). Distractors (Sydney, Melbourne, Perth) are plausible but unambiguously wrong. Content grade: standard. Calibrated difficulty: medium.

EN pass filter
333.2K+
PL pass filter
331.9K+

How deep your trivia goes

Four labels per question so you can drill from broad to specific — or filter exactly the slice your game needs.

Categories
24
Subcategories
30,795
Tags
81,723
Topics
2,184
History European history world-war-ii World War II 6,900
Music American Musicians beatles The Beatles 540
Science & Nature Physics quantum-mechanics Quantum Mechanics 90

Each question carries a broad category (24 total), one or more organic subcategories and tags harvested from the question, and a curated topic that groups identical concepts across translations and synonyms — so "World War II" and "Druga wojna światowa" map to the same topic handle. All four are filterable in the API.

Browse what's inside

Top topics by quiz-ready question count. Skim the list to see what your players will actually answer.

Biography

254,003 questions

NFL

73,066 questions

U.S. Presidents

61,376 questions

  • Music Industry 56,310
  • Record Labels 53,840
  • American Musicians 48,982
  • Professional Sports 45,874
  • Higher Education 45,108
  • Political Geography 44,100
  • Administrative Divisions 43,228
  • Cinema History 42,814
  • American History 41,700
  • Physical Geography 41,216
  • Professional Athletes 41,144
  • 2000s Cinema 39,406
  • North American Geography 38,754
  • European Geography 37,992
  • U.S. History 37,926
  • American Politics 36,375
  • United States Geography 35,998
  • U.S. Geography 35,654
  • Major League Baseball 35,279
  • Music History 34,148
  • U.S. Politics 34,059
  • 20th Century Literature 33,406
  • Business History 32,798
  • Pop Music 32,064
  • American Cinema 30,992
  • U.S. Presidency 30,950
  • Military History 30,486

Three question types

Enough structure to power any quiz UI without custom parsing per source.

0

Multiple choice

One correct answer from 3-4 options. The classic trivia format. Returned by default.

0

True / False

Binary yes/no questions. Quick rounds, party games, warm-ups. Returned by default.

0

Open answer

Free-form text for quiz apps that validate on the client. Opt-in via `?type=text_input`.

Try a sample response

Ten pre-loaded questions, no sign-up. Switch language and click through to see the exact shape your client would receive.

Language: 
{
  "id": "019dc5f6-4a57-7e29-8c43-6370483b8d32",
  "type": "multiple",
  "difficulty": "medium",
  "language": "en",
  "category": "books",
  "question": "Which book in \"The Hunger Games\" series was released in 2010?",
  "correctAnswer": "Mockingjay",
  "incorrectAnswers": [
    "The Hunger Games",
    "Catching Fire",
    "The Ballad of Songbirds and Snakes"
  ],
  "subcategories": [
    {
      "slug": "young-adult-fiction",
      "label": "Young Adult Fiction"
    },
    {
      "slug": "dystopian-novels",
      "label": "Dystopian Novels"
    },
    {
      "slug": "science-fiction-literature",
      "label": "Science Fiction"
    },
    {
      "slug": "21st-century-books",
      "label": "21st Century Books"
    },
    {
      "slug": "series-publishing",
      "label": "Series Publishing"
    }
  ],
  "tags": [
    {
      "slug": "mockingjay",
      "label": "Mockingjay"
    },
    {
      "slug": "suzanne-collins",
      "label": "Suzanne Collins"
    },
    {
      "slug": "katniss-everdeen",
      "label": "Katniss Everdeen"
    },
    {
      "slug": "ya-literature",
      "label": "Young Adult Fiction"
    },
    {
      "slug": "hunger-games",
      "label": "Hunger Games"
    }
  ],
  "attribution": {
    "author": "Amazon Science (Mintaka)",
    "source": "mintaka",
    "license": "CC-BY-4.0",
    "licenseVersion": "4.0",
    "licenseUrl": "https://creativecommons.org/licenses/by/4.0/",
    "url": "https://github.com/amazon-science/mintaka",
    "modifications": [
      "refined_text",
      "quizified"
    ],
    "lastModified": "2026-05-21T09:11:44.531Z"
  }
}

This is a static sample. Want to hit the real API with your own filters? No sign-up needed.

Try it live →

Built for four kinds of teams

From a vibe-coded weekend project to a multilingual learning platform — same API, different shape.

21 ready recipes

Slack bot, Discord activity, Anki generator, MCP for Claude, Cursor pomodoro, Twitch overlay — copy the code, ship.

All 24 categories

From general knowledge to anime. Pause on hover.

General knowledge 57,465 Books 77,645 Film 117,804 Music 131,462 Musicals & theatre 4,976 Television 57,521 Video games 42,572 Board games 1,102 Science & nature 43,546 Computers 7,214 Mathematics 1,793 Mythology 3,662 Sports 105,577 Geography 132,147 History 133,034 Politics 53,269 Art 20,032 Celebrities 128,813 Animals 8,151 Vehicles 25,076 Comics 3,638 Gadgets 5,443 Anime & manga 4,124 Cartoons & animation 7,293 General knowledge 57,465 Books 77,645 Film 117,804 Music 131,462 Musicals & theatre 4,976 Television 57,521 Video games 42,572 Board games 1,102 Science & nature 43,546 Computers 7,214 Mathematics 1,793 Mythology 3,662 Sports 105,577 Geography 132,147 History 133,034 Politics 53,269 Art 20,032 Celebrities 128,813 Animals 8,151 Vehicles 25,076 Comics 3,638 Gadgets 5,443 Anime & manga 4,124 Cartoons & animation 7,293

Start in 30 seconds

  1. 1

    Sign up

    Free tier, no credit card.

  2. 2

    Grab your API key

    Free plan gives the full API: 500 requests/day, every endpoint, the entire 1.2M+ catalog. No card required.

  3. 3

    Make your first request

    One curl, one JSON back. Ship by lunch.

curl -H "X-API-Key: qb_pk_YOUR_KEY" \
  "https://quizbase.runriva.com/api/v1/questions/random?amount=5&lang=pl"

Open data, publicly available

12 datasets blended into the API, 9 BY-SA dumps published separately so you can mirror, fork, or audit the data we build on top of. Categorization, generated distractors, and topic groupings stay in the API.

Browse the open dumps

Built in the open, growing on request

Need a new language? Cultural region we don’t cover yet? An endpoint shape that would unblock your app? Email — every paid customer request goes to the top of the roadmap.

Growing on request

Missing language, region, endpoint shape, or filter? Email and it goes on the roadmap. Paid customers cut the line.

Email us

Shipping in public

Every release lands in the changelog with what changed, what broke, and what’s next.

See the changelog →

Benchmarked openly

Real production load tests with k6. Numbers, methodology, raw dumps — all linked from the docs.

Read the benchmarks →

Frequently asked questions

Ship your quiz app this weekend.

Free tier, no credit card, clear docs.

Get API key Read the docs