Technical Scenarios

Build a Tip Report

Split an Online Payment

Build a Sales Report

Delayed Capture

Partial Payments

Statement Descriptions

ACH Bank Transfer Payment

Afterpay and Clearpay Payments

Cash App Payments

External Payments

Collect Application Fees

Update Payment and Tip Amounts

Retrieve Payments

Refund Payments

Refund a Payment with an App Fee

Retrieve Refunds

Process an Unlinked Refund

Process Disputes

Test in the Sandbox

Take Payments on Hardware

Take Payments for Orders

Take One-Off Payments

Manage Terminals

POS App Pairing

Monitor Square Terminals

Check Device Information

Customize Terminal Checkouts

Add Payment and Checkout Features

Save Card on File

Print or Issue Receipts

Customize the Idle Screen

Custom Screen Workflows

Confirmation Screen

Signature Capture Screen

Data Collection Screen

Menu Selection List Screen

Link and Dismiss Actions

Manage Terminal Actions

Mobile Payments SDK

Build on Android

Authorize the Mobile Payments SDK

Pair and Manage Card Readers

Tap to Pay on Android

Offline Payments

Handling Errors

Authorize the Mobile Payments SDK

Pair and Manage Card Readers

Tap to Pay on iPhone

Offline Payments

Configure for Square Stand or Square Kiosk

Handling Errors

Migrate from Reader SDK

React Native Plugin

Point of Sale API

Build on Android

Build on Mobile Web

Find Your Android Fingerprint

Use the API in Offline Mode

Add an Alert Dialog Helper Class

Accept E-Money Payments

Accept PayPay Payments

Mobile Web Technical Reference

Payments API Integration

Take Payments Online

Web Payments SDK

Set Up the Web Client App

Add the SDK to the Web Client

Deploy the Application

Take a Card Payment

Integrate Digital Wallets

Digital Wallet Payment Requests

ACH Bank Transfer

Square Gift Card Payments

Take a Gift Card Payment

Take Partial Payments

Customize the Card Entry Form

Charge and Store Cards

Add a Content Security Policy

In-App Payments SDK

Quick Pay Checkout

Square Order Checkout

Subscription Plan Checkout

Checkout Settings

Checkout Configurations

Manage Checkout

Guidelines and Limitations

Subscriptions API

Subscription Plans and Variations

Manage Subscriptions

Subscription Actions and Events

Pause, Resume, or Cancel Subscriptions

Subscription Billing and Invoices

Swap Subscription Plan Variations

Create and Publish Invoices

Retrieve, List, or Search Invoices

Create or Delete Invoice Attachments

Update Invoices

Cancel or Delete Invoices

Pay or Refund Invoices

Walkthrough: Create and Publish Invoices

Create a Card on File from Payment ID

Create a Card on File and Make a Payment

Create a Shared Card on File and Make a Payment

Manage Card Declines

List Payout Entries

Mobile Authorization

Build with Mobile Authorization

Get Authorization Code on Command Line

Payment Methods by Country

Payments Pricing

Strong Customer Authentication

Payment Minimums

/

/

Take Payments on Hardware

/

Flutter Plugin Deprecated

Applies to: Reader SDK - AndroidReader SDK - Android | Reader SDK - iOSReader SDK - iOS

Use Flutter to create applications that take payments on iOS and Android.

Warning

The Square Reader SDK is deprecated and will be retired on December 31, 2025. The SDK is no longer receiving new releases and support for new operating systems isn't guaranteed.

The Mobile Payments SDKMobile Payments SDK launched as the successor of the Reader SDK and is now in General Availability (GA). To ensure continued support and functionality, you should migrate your application from the Reader SDK to the Mobile Payments SDKmigrate your application from the Reader SDK to the Mobile Payments SDK before the retirement date.

On this page

Overview

The Flutter plugin for the Reader SDK is an open source project that provides a Dart interface for calling the native Reader SDK implementations.

For more information, see the Get StartedGet Started, quickstart sample application, and technical reference in the Reader SDK Flutter repo on GitHubReader SDK Flutter repo on GitHub.

Did you know?

If you don't have a Square Reader, you can purchase a Magstripe Reader onlineonline or buy a Square Reader onlineonline or in personin person.

See also

React Native PluginReact Native Plugin

On this page

Overview See also

Was this page helpful?

Yes

No

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