NTP SDK by Cypherbridge Systems is a library that implements the RFC5905 standard Network Time Protocol (NTP) for high-resolution wide-area network UTC time synchronization. Designed for embedded systems and IoT devices, this SDK provides client functionality for synchronizing time with NTP servers. It includes timestamp and system clock processing capabilities, along with algorithms for NTP server polling, clock filtering, and local clock step and slew operations. The SDK is implemented as a portable ANSI-C library, allowing deployment across various processors, platforms, operating systems, and TCP/IP stacks. It is designed to integrate with the Cypherbridge SDKPac framework for easier deployment and compatibility.