Open Notify

ISS astronauts, current location, etc

Science & MathAuth: NoneHTTPS: NoCORS: noStatus: unknown

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Getting Started

This API requires no authentication — you can start making requests immediately with no sign-up or API key needed.

Find the endpoint — Check the API's documentation for available endpoints and what data they return.
Make a request — Use fetch() in JavaScript, curl in your terminal, or any HTTP client to call the API.
Use the data — The API will return data (usually JSON) that you can parse and use in your application.

No-auth APIs are the easiest to get started with — perfect for learning, prototyping, and building side projects.

CORS Support

This API does not support CORS, so you'll need to call it from a server-side application or use a proxy. Direct browser requests will be blocked by the browser's same-origin policy.

Quick Example

// Using cURL
curl http://open-notify.org/Open-Notify-API/

// Using JavaScript fetch()
const response = await fetch(apiUrl);
const data = await response.json();

About Open Notify

Open Notify is a free, no-authentication API in the Science & Math category. You can start using it immediately without creating an account or obtaining an API key — just send an HTTP request and receive data back. This API does not require HTTPS and does not support CORS — you will need to call it from a server-side application.

Frequently Asked Questions

Is Open Notify free to use?

Yes, Open Notify is listed as a free public API. It requires no sign-up or API key. Some APIs have rate limits on their free tier, so check the official documentation for current limits.

Can I use Open Notify in my web app?

Not directly from the browser — this API does not support CORS. You will need to set up a backend proxy server (using Node.js, Python, etc.) that calls the API and forwards the response to your frontend.

What format does Open Notify return data in?

Most free APIs return data in JSON (JavaScript Object Notation) format. JSON is supported by every major programming language and is easy to parse. Check the API's documentation for the exact response format and available fields.

Is Open Notify still working?

We have not recently verified the status of this API. Try visiting the API URL directly or making a test request to check if it is currently online.

Are there alternatives to Open Notify?

Yes! Browse our Science & Math category to see all available APIs in the same category. Having alternatives is recommended in case this API goes offline or changes its terms.