Square

Easy way to take payments, manage refunds, and help customers checkout online

BusinessAuth: OAuthHTTPS: YesCORS: unknownStatus: dead

Last verified: April 1, 2026

Getting Started

This API uses OAuth for authentication, which is more involved than a simple API key but provides better security, especially when accessing user data.

Register your app — Create an application on the API provider's developer portal to get a Client ID and Client Secret.
Implement the OAuth flow — Redirect users to the provider's authorization page, where they grant permission to your app.
Exchange the code — After authorization, you'll receive a code that you exchange for an access token.
Use the token — Include the access token in the Authorization header of your API requests.

OAuth is commonly used by APIs that access personal data (like social media accounts). Many libraries exist to simplify the OAuth flow in every major programming language.

CORS Support

CORS support for this API is unknown. If you get cross-origin errors in the browser, try calling the API from your server instead.

Quick Example

// Using cURL
curl -H "Authorization: Bearer YOUR_ACCESS_TOKEN" https://developer.squareup.com/reference/square

// Using JavaScript fetch()
const response = await fetch(apiUrl, {
  headers: { 'Authorization': 'Bearer YOUR_ACCESS_TOKEN' }
});
const data = await response.json();

About Square

Square is a free API in the Business category. It uses OAuth for authentication, which provides secure access to user-specific data. This API supports HTTPS for secure connections and has unknown CORS support — test from your environment to confirm.

Frequently Asked Questions

What kind of data does Square return?

Square is an API in the Business category. The specific data it returns depends on its endpoints — this could include structured records, search results, media files, or computed values. Visit the official documentation for a complete list of endpoints and response schemas.

What can I build with Square?

As a Business API, Square can be integrated into web apps, mobile apps, browser extensions, chatbots, data dashboards, or backend services. Common use cases include displaying live data on a website, automating data collection, building comparison tools, or enriching your own database with external information.

Are there similar APIs to Square?

Yes — browse our Business category to see all available APIs in the same space. Using multiple APIs can help with redundancy (if one goes down) and provide richer data by combining different sources.

Is Square free to use?

Yes, Square is listed as a free public API. You will need to register an application to get OAuth credentials, but access is free. Some APIs have rate limits on their free tier, so check the official documentation for current limits.

Is Square still working in 2026?

Our most recent health check indicates Square may be down or unreachable. It could be temporarily offline or permanently discontinued. Check the official website for status updates and consider browsing alternatives in the same category.