API: What an Application Programming Interface Is and How It Helps Your Business

API: What an Application Programming Interface Is and How It Helps Your Business

An API is the bridge that lets two systems talk without human help. When a customer pays online and receives a confirmation, APIs carried that information between systems.

Key points

  • APIs save time by removing manual copying between tools.
  • Common examples: payment gateways, shipping, maps, WhatsApp messaging, accounting.
  • Keep API keys secret and use HTTPS.
  • Check pricing and limits before relying on an API.
  • Document which APIs your project uses and who owns the keys.

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