Open Notify

API Details

Quick Start

Copy this JavaScript snippet to start using the API immediately.

const res = await fetch("http://open-notify.org/Open-Notify-API");
const data = await res.json();
console.log(data);

Access This API

View endpoints, request formats, rate limits, and full response schemas in the official docs.

Authentication Guide

Call this API directly from any frontend or backend – no sign-up required.

Compatibility

Developer Tips

• →No key needed – safe to call from browser or server.
• →Direct browser fetch calls work – no proxy needed.
• →Handle rate limits with retry logic and exponential backoff.
• →Cache responses locally to minimize calls and stay on free tier.

Science & Education Category

Explore all free APIs in the Science & Education category.