Jitbit offers hosted help desk, help desk system, and live chat services. In particular, Jitbit Helpdesk is a great widely-used support ticketing system. Developers can use it in the cloud OR install it on their own server. The endpoint URL is the hosted one, change "subdomain" to account's subdomain. The API allows getting tickets from the app, closing, replying to tickets, and attaching files.
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.