Square

Square Payments API

The Payments API lets applications take and manage payments by charging payment methods supported by the Web Payments SDK or In-App Payments SDK, including credit cards, gift cards, digital wallets, and ACH bank transfers. It can also record cash or external payments received outside of Square.

Documentation GitHub OpenAPI

Documentation

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Documentation

https://developer.squareup.com/docs/payments-overview

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APIReference

https://developer.squareup.com/reference/square/payments-api

Specifications

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OpenAPI

https://raw.githubusercontent.com/api-evangelist/square/refs/heads/main/openapi/square-openapi.yml