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From their site: Litmus shows you precisely how your designs will be seen by your customers. See screenshots of your web pages in dozens of different browsers within seconds. Web page testing, email testing, and bug tracking lets you see exactly where the compatibility issues are. We deliver screenshots of your web sites and email newsletters in seconds across all popular platforms. Use the full API for both our email and web site testing services.
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.
The Litmus Ruby SDK by Mattew Fawcett allows API interaction to access email testing data. A usage example demonstrates how to create an email test, poll results, and obtain results. Installation available.
The Litmus PHP SDK by Guillaume Luchet allows to communicate with the API to access email testing capabilities. Examples provide code to set API credentials, obtain emails for testing purposes, and create a page test on Apple Safari.