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How to use the Yes No API in JavaScript

Generate yes or no randomly. This guide calls it from JavaScript with code we've run against the live endpoint.

Online · 923 msEndpoint tested Oct 24, 2026

1. What you need

Any modern browser. Paste the code into the DevTools console or a module script tag.

No API key or sign-up. Endpoint: https://yesno.wtf/api

2. Make the request

JavaScript
const res = await fetch("https://yesno.wtf/api");
if (!res.ok) throw new Error(`HTTP ${res.status}`);
const data = await res.json();
console.log(data);

3. The response

Trimmed from the live response on Oct 24, 2026.

JSON
{
  "answer": "yes",
  "forced": false,
  "image": "https://yesno.wtf/assets/yes/13-c3082a998e7758be8e582276f35d1336.gif"
}

4. Before you ship

  • Set a timeout and handle non-200 responses: free APIs can rate-limit or go down.
  • Cache responses where you can, instead of calling the API on every page view.
  • Browser calls depend on CORS. If a request is blocked, move it to a server or serverless function.
  • Read the official documentation ↗ for rate limits and terms of use.

FAQ

Does the Yes No API need an API key in JavaScript?

No. The Yes No API works without an API key, so the JavaScript example runs as-is.

Can I call the Yes No API from the browser?

Yes. It sends CORS headers, so front-end JavaScript can call it directly.

What does the Yes No API return?

JSON. The example response on this page is trimmed from a real response our health check received on Oct 24, 2026.

Same API in: Python · Node.js · PHP · Java · Go · Ruby · C#
Yes No API: ratings & reviews · Yes No API alternatives · more free APIs for JavaScript