+Api (Application Programming Interface) refers to a set of defined interactions between software components. It allows different systems to communicate, enabling the building of complex [software](/wiki/software) applications. These interfaces act as a contract, detailing how one program requests services from another, often foundational in [web services](/wiki/web_service).
+## See also
+- [REST](/wiki/rest)
+- [Microservices](/wiki/microservices)
+- [Data Exchange](/wiki/data_exchange)
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