M
API Matrix

quizapi.io API

⭐ Beginner's Pick Games & Comics / API Key Intermediate HTTPS CORS
Varies by plan (check documentation)
82 Score
Grade A
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Overview

QuizAPI.io provides a large collection of programming and technology quiz questions with multiple-choice answers, making it perfect for building coding quizzes and learning apps. You need a free API key to access questions. Questions can be filtered by category, difficulty, tags, and programming language.

💡

Beginner Tip

Sign up for a free API key at quizapi.io and include it as a query parameter (apiKey=YOUR_API_KEY). Use the category and difficulty parameters to get questions suited to your use case, like category=Linux&difficulty=Easy.

Available Data

quizapi.io data via REST API
JSON-formatted response data
Requires API key authentication

Example Response

JSON Response 
{
  "id": 1,
  "name": "quiz.io",
  "data": "Access to various kind of quiz questions",
  "source": "quizapi.io"
}

Field Reference

id Unique identifier for the quiz question
question The quiz question text to display to the user
answers Object with keys answer_a through answer_f containing possible answer choices (some may be null)
correct_answers Object with boolean string values indicating which answers are correct (e.g., answer_a_correct: "true")
difficulty Difficulty level of the question: Easy, Medium, or Hard
category Topic category of the question such as Linux, DevOps, or Docker

Implementation Example 

const url = "https://quizapi.io/";
// Replace headers or query params with the values required by this API.
const response = await fetch(url, {
  headers: {
  "X-API-Key": "YOUR_API_KEY"
  }
});
if (!response.ok) throw new Error(`Request failed: ${response.status}`);
const data = await response.json();
console.log(data);

What Can You Build?

Note: These code examples are AI-generated and unverified. Always refer to the official API documentation for accurate usage.

Common Errors & Troubleshooting

401 Unauthorized API key is missing or invalid in the request
✓ Include your API key as a query parameter: ?apiKey=YOUR_API_KEY — get a free key by registering at quizapi.io
Empty questions array No questions exist for the specified category and difficulty combination
✓ Try removing one of the filters (category or difficulty) to broaden the search, or check the supported categories listed in the docs
429 Too Many Requests Exceeded your plan's daily request limit
✓ Free accounts have a limited quota; add caching to your app to store questions locally and reduce API calls

Matrix Score Breakdown

🌐 Reachability 30/30
⚡ Speed 10/20
🔒 Security 15/15
🛠 Developer XP 17/20
✓ Reliability 10/15

Partially tested on Apr 5, 2026

Technical Specifications

Auth API Key
HTTPS REQUIRED
CORS YES
Category Games & Comics
Difficulty Intermediate
Verified: 2026-04-04

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