With the Pipeliner CRM you may build your own API integration.
It is the Pipeliner Server API Programming Guide that contains information about functionality of server's side of Pipeliner. The document describes how to implement client's side for communication with server's side.
The guide is intended for developers who are creating integration with other systems (e.g. CRM) or want to implement their own add-ons to Pipeliner.
The reader must be familiar with AMF protocol and he has basic knowledge about Pipeliner.
You may find the documentation on THIS link.