API: The Digital Bridge Between Systems
An Application Programming Interface (API) is a set of rules and protocols that allows one software application to interact with another. It acts as an intermediary, enabling different systems to exchange data and functionality securely.
APIs are the backbone of modern web integration. They allow developers to “plug in” to existing services rather than rebuilding them. Whether it is displaying a live map, processing a credit card, or syncing weather data, APIs handle the request and delivery of information between the client and the server without the user ever seeing the underlying code.
Example: When you use a travel website to compare flights, the site uses APIs to “ask” various airlines for their current prices and schedules, then displays all that gathered information in one place for you.
Frequently Asked Questions
REST (Representational State Transfer) is a popular architectural style for APIs that uses standard HTTP requests to GET, PUT, POST, and DELETE data, making it highly scalable and easy to use for web services.
Most professional APIs require an API Key, which acts as a unique identifier and password to track usage and prevent unauthorized access to the service.
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