Definition
An application programming interface specifies how systems communicate: what can be requested, how it is authenticated, what comes back, and what errors mean. APIs are the foundation of most durable integrations.
Why it matters
A good API reduces manual transfer, duplication, and the fragility of interface-based automation.
Business example
An ecommerce order uses an API to create an accounting record and update inventory without re-keying data.
When to use it
Use it when systems need dependable, repeatable data exchange or actions.
When not to use it
Do not assume an API integration is simple without checking data definitions, limits, errors, and ownership.
How Automathing approaches it
We design integrations around the business event, data contract, resilience, and operational ownership.