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API (Application Programming Interface)

Direct answer

What is API (Application Programming Interface)?

Short definition

An API is a set of rules that allows different software applications to communicate with each other, defining how requests and responses should be structured.

Why it matters
APIs enable your software to integrate with other services, power mobile apps, and let third-parties build on your platform.

How teams use API (Application Programming Interface)

Use this term when you need to describe the practical role it plays in a software project.

Common use cases

  • Mobile apps communicating with backend servers
  • Integrating payment processors like Stripe
  • Connecting third-party services to your platform
  • Enabling data exchange between systems

Examples of API (Application Programming Interface)

These examples show the term in everyday product, platform, or operations work.

Real-world examples

  • Stripe API processing payments in your web app
  • Google Maps API showing locations in your application
  • Your app sending customer data to Mailchimp via API

Related terms