Square API and SDK Documentation

Your toolkit for building commerce apps, whether it's a custom solution or a listing on the Square App Marketplace.

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API capabilities

Square APIs work together like building blocks for any business solution.

Payments

Use Square payments in your applications to process transactions online, in-app, and in-person.

Payment solutions

Payments API Web Payments SDK Checkout API

Commerce

Completely run your product's back-of-house fundamentals and operations.

Commerce solutions

Orders API Catalog API Inventory API

Payments

Use Square payments in your applications to process transactions online, in-app, and in-person.

Payment solutions

Payments API Web Payments SDK Checkout API

Commerce

Completely run your product's back-of-house fundamentals and operations.

Commerce solutions

Orders API Catalog API Inventory API

Customers

Manage your customer data securely and keep customers coming back with engagement programs.

Customer solutions

Customers API Loyalty API Gift Cards API

Staff

Enable team management with scheduling, timecards, and full-service payroll.

Staff solutions

Team API Labor API Cash Drawer Shifts API

Customers

Manage your customer data securely and keep customers coming back with engagement programs.

Customer solutions

Customers API Loyalty API Gift Cards API

Staff

Enable team management with scheduling, timecards, and full-service payroll.

Staff solutions

Team API Labor API Cash Drawer Shifts API

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Development tools

Get up and running faster with SDKs, sample apps, and API keys.

API Explorer

Easily test and examine endpoint behaviors by making requests to the Square API.

API Explorer

Square SDKs and plugins

Build in PHP, Java, Python, Node.js, Ruby, .NET, iOS, Android, React Native, and Flutter.

Sample apps

See Square APIs in action by downloading code templates for simpler setup.

Square SDKs and plugins

Build in PHP, Java, Python, Node.js, Ruby, .NET, iOS, Android, React Native, and Flutter.

Sample apps

See Square APIs in action by downloading code templates for simpler setup.

API Explorer

Easily test and examine endpoint behaviors by making requests to the Square API.

API Explorer

Square SDKs and plugins

Build in PHP, Java, Python, Node.js, Ruby, .NET, iOS, Android, React Native, and Flutter.

Sample apps

See Square APIs in action by downloading code templates for simpler setup.

Square SDKs and plugins

Build in PHP, Java, Python, Node.js, Ruby, .NET, iOS, Android, React Native, and Flutter.

Sample apps

See Square APIs in action by downloading code templates for simpler setup.

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Partner ecosystem

Find new customers by partnering with Square.

Square App Marketplace

Publish your app on the Square App Marketplace to expand your reach.

App Marketplace

Solutions Partner

Share your expertise with independent sellers by becoming a Solutions Partner.

Solution partner

Square App Marketplace

Publish your app on the Square App Marketplace to expand your reach.

App Marketplace

Solutions Partner

Share your expertise with independent sellers by becoming a Solutions Partner.

Solution partner

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Community

Stay connected with the Square developer community. Get the scoop on platform updates, ask us a question, drop a comment, or all of the above using the following links.

News

Changelog • Blog

Social

Slack • Twitter

Help

Support • Forums

Tutorials

Youtube

News

Changelog • Blog

Social

Slack • Twitter

Help

Support • Forums

Tutorials

Youtube

Docs

Square API and SDK Documentation

API capabilities

Payments

Commerce

Payments

Commerce

Customers

Staff

Customers

Staff

Development tools

API Explorer

Square SDKs and plugins

Sample apps

Square SDKs and plugins

Sample apps

API Explorer

Square SDKs and plugins

Sample apps

Square SDKs and plugins

Sample apps

Partner ecosystem

Square App Marketplace

Solutions Partner

Square App Marketplace

Solutions Partner

Community