Gradwell is a communication technology company that provides a variety of services that include broadband internet access, business phone services, email hosting, web hosting, and a computer hardware store.
The Call API lets users add a "call" button to their websites that allows visitors to ask to be called by the user's system. The visitor provides their phone number; one of the user's extensions makes a call to that number; and when the visitor answers, the call is routed to an internal destination.
The following is a list of SDKs from our SDK directory that matched your search term. Though your definition of an SDK may differ, in our world, we define SDKs as platform- specific tools for consuming existing APIs of the sort we list in our API directory. For example, the Ruby SDK for consuming the Twitter Ads API. If you think an SDK, API, or other asset is missing from our directory, be sure to check our guidelines for making contributions to ProgrammableWeb.