The KISSmetrics PERL SDK by KISSmetrics serves only as a point of reference to access metric data, useful to implement into marketing applications. Please note the final releases of KISSmetrics clients are available in the repository link on this site.
MuleSoft Announces Anypoint Platform for APIs July Release which includes enhancements like a seamless unified platform, advanced identity management, and powerful analytics. The company describes the platform as "the only end-to-end platform to design, document, expose, manage and integrate APIs."
The vast majority of analytics software is going to be consumed within another application, rather than exist as a stand-alone application. Recognizing this fact, analytics application vendors are racing to deliver robust sets of APIs around their applications that make it easier for developers to embed those capabilities within their applications.