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Build apps that connect to Square hardware

In-person payments for developers

Accept payments with Square hardware using Square APIs and SDKs

Whether you’re building a custom point of sale (POS) or a self-service kiosk, you can now connect to Square Stand, Square Readers, and Square Terminal by integrating with our APIs and SDKs for in-person payments. Let Square manage the complexities of payment processing, including security and compliance, so you can focus on building a world-class product.

Choose your in-person payments integration.

Build with Square Terminal API to give your sellers access to the sleek Square Terminal device for all-in-one credit card processing and printed receipts. Or, build with Square Reader SDK to give sellers an option between two Square Readers and Square Stand for in-person payments.

Terminal API (Beta)

Build a custom point of sale that connects to Square Terminal, an all-in-one credit card device, from any platform. Accept Apple Pay, Google Pay, and credit card payments (chip and magstripe) anywhere.

Reader SDK

Build a custom iOS or Android point of sale that connects to Square card readers. Accept Apple Pay, Google Pay, and credit card payments (chip and magstripe) anywhere. Reader SDK is compatible with Square Stand, Square Reader for contactless and chip, and Square Reader for magstripe.

Ready to get started?

Review our documentation and start integrating payment capabilities into your app.