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.

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

Take online payments.

Go fully customisable 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 credit 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.

Every payment type

Process all major credit and debit cards and accept mobile-wallet contactless payments out of the box. This includes Apple Pay, Google Pay and Samsung Pay.

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.

Fraud detection

We use machine learning to analyse 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
  • Queue-reducing 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 tap, insert or swipe

In-App Transactions


Per transaction

Online Transactions


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?