How does the Aptos API, a robust Application Programming Interface, empower developers by providing a standardized set of rules and protocols, thereby facilitating seamless integration with third-party applications and enabling the customization and extension of the Aptos retail platform? Moreover, what key opportunities does the Aptos API offer in terms of integration with external systems, customization capabilities, automation of retail processes, real-time data access, security measures, and the availability of comprehensive developer resources, making it a versatile tool for developers looking to enhance the functionality and efficiency of retail operations?
