Using Dwolla's API starts with creating an application that's tied to a Dwolla account. Once set up, whether sending once-in-a-while payments or fully integrating with a specialized point of sale system, your Dwolla application will act as your identity to the end user & as a central point to graphically manage your application settings.
Before getting started, register a free Dwolla application at - dwolla.com/applications
Dwolla's API can be integrated in 3 different flavors:
Simple payment button. Read about creating a button »
Offsite checkout gateway. Read about the offsite gateway »
OAuth + RESTful API. Read about the API »