Although very new, the predictive API (or PAPI) concept is important. With PAPIs, we see the direct availability of machine language analysis to create predictions in a manner that can easily be integrated with other APIs. This can be employed to create sophisticated mashups with predictive capability for use in decision making. It is linkage to decision making and the ability instantly to invoke machine language prediction from diverse realms that makes PAPI important. While relatively few examples exist today, the development of the API economy and the further progress of big data will ensure that many more PAPIs are developed in more diverse areas.