square_mobile_payments_sdk 2025.3.0

Square Mobile Payments SDK. Allows developers to take in-person payments using Square hardware.

Flutter plug-in for Mobile Payments SDK

Mobile Payments SDK for Flutter supports the following SDK versions:

• iOS: 2.1.0 and above
• Android: 2.1.0 and above

Review requirements

Before getting started, please review the Requirements and Limitations and Device Compatibility sections to ensure that the SDK can be used in your project:

• Android: Requirements and Limitations, Device Compatibility
• iOS: Requirements and Limitations, Device Compatibility

Installation

  flutter pub add mobile-payment-sdk-flutter

copied to clipboard

For usage and in-detail documentation, visit our documentation section.

Documentation

• Mobile Payments SDK Overview
• iOS Tech Reference
• Android Tech Reference

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

Mobile Payments SDK Sample App

Donut Counter is a sample application included in the example folder of this repository. It is built using Flutter 3.27.3 and designed to help developers utilize the Square Mobile Payments SDK. This application serves as a practical guide for integrating and leveraging the SDK's capabilities within your own projects. It demonstrates essential functions such as initializing and authorizing the SDK, using mock readers, and processing a $1.00 payment.

License

Copyright 2025 Square Inc.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

copied to clipboard