Create an Account and App

Make your First API Call

View the API Logs

Verify the Payment

Developer Tools

Developer Console

Build a Team of Developers

Square Dashboard

Test in Sandbox

Sandbox Payments

Webhook Event Logs

Create a Notification URL

Subscribe to Event Notifications

Verify and Validate an Event Notification

Manage Operations

Move Event Notifications to Production

Webhook Events Reference

Troubleshooting

Sample Applications

Build your First Query

GraphQL Explorer

Create Redirect URL and Authorization Page URL

Receive Authorization and Manage OAuth Tokens

Refresh and Revoke OAuth Tokens

Token Introspection

OAuth Best Practices

OAuth Walkthrough

Migrate to the Square API OAuth Flow

Move OAuth to Production

Permissions Reference

Webhook Subscriptions

Migrate from Deprecated APIs

Deprecated Items

API Migration Guides

v1 Payments API

Square Transactions API

Migrate Employees to Team Members

Migrate from CreateCheckout to CreatePaymentLink

International Development

OAuth and Testing

International Payments

Regional Differences for International Development

Compliance with Japan's Tax Invoice System

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Common Data Types

The following data types are common across Square APIs:

If you need more assistance, contact Developer and App Marketplace Support or ask for help in the Developer Forums.