Square API
Payments · Banking & Fintech
Square API is a comprehensive payment and commerce platform API from Square, Inc. (now Block, Inc.) that enables developers to build custom point-of-sale applications, online payment flows, inventory management systems, subscription billing, and retail commerce solutions. Square provides a deeply integrated suite of commerce APIs covering payments, orders, inventory, customer management, loyalty programs, and employee management that work together to provide a complete retail and services business management platform.
Businesses in the US, UK, Canada, Australia, Japan, France, Spain, or Ireland needing a deeply integrated in-person + online payments platform — Nigeria is NOT a supported Square market.
Square does not support Nigeria. Supported countries: US, Canada, UK, Australia, Japan, France, Spain, Ireland. Nigerian developers and businesses cannot create Square accounts or receive settlements. Listed for reference only.
Features Included
Not Supported
Key Highlights
- In-person & online payments
- Free POS app included
- Inventory management
- Invoicing & subscriptions
- Employee management
- Sandbox environment
Required Access Documents
- Square AccountRequiredA verified Square merchant account is required to use the Square API.
- Business ID / Tax InfoRequiredRequired during merchant account verification.
Use Cases
- Retail POS Systems:Build custom point-of-sale applications for retail stores using the Square API to process in-person card payments.
- Restaurant Management:Integrate the Square API into restaurant ordering systems for table-side payments, tipping, and order management.
- Online Store Checkout:Embed Square's payment form via the Square API to accept credit card payments in your web store.
- Subscription Services:Manage recurring billing and membership fees with the Square API's subscription management endpoints.
- Inventory Sync:Keep product stock levels synchronized across physical and online channels using the Square API inventory endpoints.