Glossary term
What is API (Application Programming Interface)?
API stands for Application Programming Interface.
A defined way for programs to talk to each other. Example: A weather app asks a weather API: "What's the temperature in Pune?".
Learn it properly · System DesignLesson 30: REST API Design Best PracticesAn API is a contract other teams depend on for years. How to design REST APIs that are predictable: nouns and HTTP methods, honest status codes, one error shape, filtering and pagination, free HTTP features, security basics and OpenAPI.