What is API (Application Programming Interface)?

A set of protocols and tools that allow different software applications to communicate and exchange data with each other.

APIs are the foundation of modern software integrations. They define how systems request and receive data from each other. REST APIs use HTTP requests (GET, POST, PUT, DELETE) to perform operations. Most business software (CRMs, ERPs, marketing tools) provides APIs that allow external systems to read and write data. API quality varies significantly - some offer comprehensive access while others have limitations on what data can be accessed or how frequently requests can be made (rate limits).

Related Terms

Webhook

An automated message sent from one application to another when a specific event occurs, enabling real-time data transfer.

API Rate Limit

A restriction on the number of API requests that can be made within a specific time period, designed to prevent system overload.

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