# Auxiliary Interfaces

> The following links present additional APIs that provide specialized functionality:

> Backup | eXtremeDB APIs allowing applications to manage incremental database backup operations
> Runtime Statistics | APIs showing memory usage for classes and indexes
> Database Calculator | A utility for determining runtime memory requirements for database objects and indexes
> System Wrappers | Platform independent wrapper functions for operating system functions
> Tracing Framework | The APIs for Implementing tracing output in C
> Feed Handler | The Feed Handler APIs for processing market data
> Web Services | The eXtremeDB Web Services APIs
> Custom_Encryption | The APIs for implementing a custom encryption algorithm
> Miscellaneous | A variety of APIs to perform specialized functionality
> Samples Helper Functions | Helper functions used by SDK samples