APIs enable limitless connectivity to external applications and provides core functionality access to securely implement features on any website. 

The VirtualBarter Ecosystem is designed and engineered using an extensible API platform. 

In software engineering, extensibility is a systems design principle where the implementation takes future growth into consideration. 

It is a systemic measure of the ability to extend a system and the level of effort required to implement the extension. Extensions can be through the addition of new functionality or through modification of existing functionality. 

The central theme is to provide for change – typically enhancements – while minimizing impact to existing system functions.

As software systems are long lived and will be continually modified for new features and added functionalities demanded by our clients and their members, extensibility enables VirtualBarter to expand or add to the software’s capabilities and facilitates systematic reuse for various use cases. 

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