← DictionaryAPI
also called application programming interface
A defined interface allowing software to request data or actions from other software.
The doorway one system uses to ask another for something.
What It Is
API is a Technology item, filed under Integration. Stated plainly: a defined interface allowing software to request data or actions from other software.
It is a mechanism rather than an opinion: set up properly it behaves predictably, and set up badly it fails just as predictably. That definition is deliberately narrow — the narrowness is what makes it usable.
How It's Used
In practice, API shows up in build decisions, tooling and the plumbing behind a working system. In real work it sits close to Integration, Webhook and Automation. The practical test is whether it is configured, documented and actually working.
Why It Matters
API is one of those items that only becomes visible when it is missing. When it is unclear, small technical debts compound into a rebuild. Deciding it deliberately costs one conversation. Leaving it undecided costs several.
Think of a tool in a drawer — dull until the moment you need exactly it. The doorway one system uses to ask another for something.
Termshift™
How the meaning shifts depending on who is using it, and where.
Inside the industry, API is used tightly and assumed to be understood: a defined interface allowing software to request data or actions from other software.
Away from the jargon, it is the doorway one system uses to ask another for something.
The Bottom Line
API pays off when it is specific and costs you when it is not. The doorway one system uses to ask another for something.