Build commerce apps that go beyond payments.

Square Developer
New!

Turn Square Points of Sale into an order fulfilment platform using the New Orders API >


Take payments across channels


Built on Security

Our payments APIs include end-to-end encryption, dispute management, fast deposits for merchants and fraud detection.

Processing Fees

All our APIs & SDKs are free for developers to use.

Square charges a processing fee on credit and debit transactions. Processing fees start as low as 1.75% for in-person transactions.


Manage orders, customers, inventory and more

Square APIs are free for developers to use

Orders API is free for orders processed with Square Payments. If you want to process payments with a third party, Contact Us.


Make your app visible to Square merchants

Millions of merchants use the Square ecosystem every day. Get your app in the App Marketplace and help our merchants run their business even better.

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Integrate with existing business systems

Transfer payments and business data into a CRM, OMS, ERP or any enterprise business solution.

Custom Pricing

Custom pricing packages may be available for large businesses depending on payment volume, average transaction size and more. We’d love to have a conversation about it.