Build Basics

To build great apps with the Square APIs and SDKs, you should learn about the basic design principles that form the foundation of Square APIs. These principles include the API versioning scheme used, base elements of the data model, secured access, error handling, and more.

API usage

• Versioning Overview

• Square API Lifecycle

• Using the REST API

• When to use Connect V1

• Handling Errors

Data model

• Square Data Model

• Working with Dates

• Working with Monetary Amounts

• Metadata

Security

• Access Tokens

• Collecting Information