What is an API?

October 8, 2025
Glossary
💡
🖥️

An application idea?

Definition

An API (Application Programming Interface) is an interface that enables different applications to communicate with each other and exchange data securely. 

It defines rules and protocols so that systems can "talk" to each other without human intervention.

Examples

  • Online payment: Integrate Stripe to process transactions without developing a payment system
  • Cartography: Display a Google Maps map on your website
  • Social networks: Automatically publish your blog posts on LinkedIn
  • Email marketing: Synchronize your CRM contacts with Mailchimp
  • Weather: Retrieve weather forecasts for display in your app

Benefits/Interest

  • Rapid integration: Connect existing services without recreating them
  • Reliability: using solutions proven by millions of users
  • Cost savings: no need to develop complex functionalities
  • Automatic updates: Benefit from enhancements to third-party services
  • Specialization: Focusing on your core business

Related terms

  • Integration
  • Webhook
  • Connector
  • Backend
  • JSON

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