Custom API development refers to the process of creating application programming interfaces (APIs) that are tailored to the specific needs and requirements of a particular software application, system, or organization. APIs are sets of rules and protocols that allow different software applications or systems to communicate with each other. They define the methods and data formats that applications can use to request and exchange information.

Custom API development plays a vital role in modern software development, enabling the creation of interconnected and functional software ecosystems tailored to specific needs.