Cat Facts API

Base URL

https://catfact.ninja

Authentication

No key required.

Rate limit

No published limit.

Pricing

Free.

CORS

Enabled — callable directly from browser JavaScript

Official docs

Read the docs

Every request below was executed against the live API on 19 Aug 2026, and the response shown is the real body it returned — not an illustration.

curl 'https://catfact.ninja/fact'

const res = await fetch("https://catfact.ninja/fact");
if (!res.ok) throw new Error(`Request failed: ${res.status}`);
const data = await res.json();
console.log(data);

import requests

res = requests.get("https://catfact.ninja/fact", timeout=20)
res.raise_for_status()
print(res.json())

{
  "fact": "In just 7 years, one un-spayed female cat and one un-neutered male cat and their offspring can result in 420,000 kittens.",
  "length": 121
}

factstring

The cat fact text.

lengthinteger

Character count of the fact.

dataarray

On /facts, the array of facts for the current page.

current_page / last_page / totalinteger

Standard pagination metadata on /facts.

• Build a first fetch tutorial with an instantly visible result
• Test pagination and infinite scroll against a real paginated API
• Add a fun fact widget to a pet or veterinary site
• Practise filtering with query parameters using max_length

If Cat Facts does not fit, these animal apis cover similar ground. Every one was called before publishing, and each links to its own reference page with a working curl command and the response it returned.