All terms
Glossary
API (Application Programming Interface)
A defined contract that lets software systems talk to each other.
An API (application programming interface) is a defined contract that lets one software system request data or actions from another - the standard way apps, services, and integrations communicate.
Well-designed APIs (clear contracts, versioning, auth, and rate limits) make a product extensible and integration-friendly; poor ones become a long-term maintenance cost.
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