API: Application Programming Interface
Acronym Series


Written by: Tod Martinsen, Senior Security Engineer
Connect with Tod on LinkedIn

In our Acronym Series, Nexum’s expert engineers define the industry’s most popular topics.

Acronym: API – Application Programming Interface

Definition: A structured way for software to exchange data.

Explanation: 

APIs were initially conceived to standardize and modularize how software exchanges data with other software and systems. Today many “flavors” of API exist depending on where and how they are used.

Web APIs are used to exchange data over the internet. Software development kits can contain hundreds or thousands of APIs that govern how programs access and use data from storage devices, communications paths, and other essential system resources. Software services provide access to unique data and features through APIs that they make publicly available.

APIs are the building blocks of modern information systems, and a functional or security flaw in them can have a wide-reaching impact. Software developers who rely on commonly published APIs may be impacted when a new security vulnerability is identified. Additionally, making changes to APIs can be complex and time-intensive because many other programs and applications typically depend on the same API functionality.

APIs available for public use are particularly susceptible to abuse and need to be designed and implemented to protect their functionality and data.

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