Whether Square provides API ? ,if available can I integrate it with one of our app?

[Raghavendra]

please guide me.

[Keithppp]

Yes, there is a square API..  We are building it into a program we created.. Here is a link. https://squareup.com/developers

[George]

We absolutely do have an API! And @Keithppp has pointed you to the right place for our documentation.

You can also look over these FAQs for more info. Hope that gets you on the right track!