Timely resources for sellers

Develop on the platform that sellers trust.

Support Square sellers by building apps for today’s business needs.

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Build commerce solutions for your own business

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Distribute your app on the Square App Marketplace

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Create custom solutions for independent sellers

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Square Developer

A platform built for growth

Join us in creating smart solutions that help sellers start, run and grow their businesses.

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Accept payments

Connect your app to our secure and PCI-compliant platform to accept payments in person, in an app or online.

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Create and track orders

Take orders via web and mobile applications and send them directly to Square Point of Sale or your own custom application.

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Manage a product catalogue

Enable fast and flexible catalogue management, including individual and batch support for retrieval, updates and deletion.

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Organize customers

Leverage customer data to create applications that help sellers grow their sales and build customer loyalty.

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Adjust inventory

Make better supply chain decisions by creating tools to improve inventory management.

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Manage employees

Integrate timekeeping or collaboration tools that support sellers and help maintain their high-performing teams.

Launch fast with Square’s developer tools

Using Square’s developer platform means less maintenance of legacy systems and more focus on core customer and product experiences.

  • Full sandbox environment
  • Interactive API explorer
  • Live event monitoring
  • Backend SDKs: PHP, Ruby, Java, .Net, Python, Node
  • Secure payment SDKs: iOS, Android, React Native, Flutter

Get started