Square Developer

Integrate Square into your apps.

Square Developer

Securely take payments everywhere with a single platform.

Omnichannel, multichannel, call it what you want. Take payments wherever your customers are.

Take in-person payments

Build a custom point of sale and connect Square hardware.

NEW: Take in-app payments.

Customize the payment form UX to fit your mobile app’s look and feel.

Take online payments.

Go fully customizable or quickly embed a checkout experience into a website.

Rely on the payment platform that has processed billions of transactions.

PCI and EMV compliance

Our hardware is compliant with EMV regulations and we take on the burden of staying PCI compliant, which means you don’t have to worry about assessment fees or potential expensive data breach fines.

End-to-end encryption

From the time the customer taps, inserts or swipes a card, the data is encrypted until it reaches Square’s processing environment. Customer data never touches the seller’s servers. And it’s all pre-configured, with no additional steps necessary.

Start selling fast

Get Square Reader for contactless and chip to start accepting INTERAC Flash®, contactless credit cards, Apple Pay, Google Pay and chip credit cards. Or use our online payments APIs to take card payments online.

Dispute management

We have a dedicated disputes team to deal with the bank for you. We’ll ask for the documentation we need and take care of the rest with no additional fees.

Fast deposits

Get your money faster with Square’s deposits as soon as the next business day.

Fraud detection

We use machine learning to analyze every payment in our ecosystem. It enables us to prevent fraud on sellers’ behalf, regardless of the payment volume they are processing.

Do more than take payments.

Understand your customers, sales, inventory and more.

Easily make informed decisions with a complete view of your inventory, customers and products across all of your online, in-app and in-person sales.

Integrate with existing business systems.

Transfer payments data into a CRM, OMS, ERP or any enterprise business solution.

Create unlimited solutions including:

  • Order-ahead apps
  • Online checkout experiences
  • Line-busting mobile solutions
  • Customer management solutions
  • Custom points of sale
  • Self-service kiosks

Square APIs and SDKs are free for developers to use.

Square charges a processing fee on credit and debit transactions.

In-Person Transactions


Per credit tap, insert or swipe

10 ¢

Per Interac Flash® tap (debit tap payments under $100)

In-App Transactions

2.9% + 30¢

Per transaction

Online Transactions

2.9% + 30¢

Per transaction

Custom rate

Custom pricing packages may be available for large businesses depending on payment volume, average transaction size, and more. We’d love to have a conversation about it.

Contact Sales >

Open-source platforms supporting Square.

Ready to get started?