APIs are "a set of subroutine definitions, protocols, and tools for building software and applications." (Wikipedia). Web Services are "a software system designed to support interoperable machine-to-machine interaction over a network." (W3C). They have even been called Web APIs by some.
In 2005, Grey Wolf started the development of APIs for integration with ERP systems. Over time, those APIs have grown and matured into over 150 APIs in the "pool." Grey Wolf recently enhanced the APIs into Web Services for a stable and standardized approach to ERP integration.
The architecture for Grey Wolf's APIs and Web Services are consistent across all ERP systems. There is a piece of software loaded on the ERP system with access to that software from the Grey Wolf Web Services server in our secure datacenter.
The APIs that fuel the Web Services are standardized across all subscription users. This ensures consistant results from a standard environment. In the case of custom ERP modifications, Grey Wolf is able to create custom APIs that are then isolated from the standard environment. This ensures consistency while supporting unique customer requirements.