The API will allow brick-and-mortar merchants to process payments through Square and use some piece of the company's hardware without having to sign up for Square's Register point-of-sale software.

Square is rolling out a new API for online ordering that it says will make it easier for developers to build digital in-app payment services. For merchants using one of Square's point of sale products ...

Point-of-sale provider Square on Thursday rolled out Order API, which allows merchants to manage order fulfillment within the Square system. The feature is available in the United States, Canada, ...