The UpCall REST API allows developers to access and integrate the functionality of UpCall with other applications. The API allows management of programmatically making human-powered phone calls at scale. Some example API methods include managing calls, managing numbers, and retrieving call data. UpCall is a platform for making outbound, human calls. The API promises to "Programmatically make human-powered phone calls at scale. Send us your numbers and we will call them for you."