What does API stand for?
| Full form | Application Programming Interface |
|---|---|
| Category | Technology & computing |
| Type | Initialism |
The initialism API stands for Application Programming Interface. It refers to a defined way for software components to interact.
This guide covers API in software. An API can belong to a browser, library or online service; it does not necessarily mean a public web address.

Meaning in context
- Application
- The software providing a capability, or the program using that capability.
- Programming
- Interaction takes place through software code rather than only through a person's clicks.
- Interface
- The agreed operations and rules a caller can use. An interface is not the implementation behind it.
Writing helper
Introduce the name when your reader needs it. Keep later mentions short.
This helper uses the Application Programming Interface meaning.
Ready to review
Suggested wordingPractical examples
Explain an integration
- Before
The site uses an API.
- After
The site uses the booking service's API to request available appointments.
The revision identifies the provider and the task without claiming how the provider implements it.
Describe one request
- Before
Send it to the API.
- After
Send the request to the booking API's availability endpoint.
An endpoint is one destination within an interface, not a synonym for the entire interface.
Describe a result
- Before
Display the API.
- After
Display the availability data returned by the booking API.
A reader can now tell that the interface supplies data and the page displays that data.
Original illustrative examples, not quotations or reports of actual events.
Use the meaning clearly
Am I describing an interface, one operation, or the data it returns?
See all guidance
Explain an integration
Name both systems and what one can request from the other.
The site uses the booking service's API to request available appointments.
Describe one request
Give the API's name and the specific operation or endpoint separately.
Send the request to the booking API's availability endpoint.
Describe a result
Call the returned material a response or data, and name its origin.
Display the availability data returned by the booking API.
Choose guidance for an integration, request or response. The wording tool does not test the API.
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By AcronymIndex Editorial Team · Editorial policy