What is third-party APIs?

Third-party APIs (Application Programming Interfaces) are interfaces provided by entities other than the main system or application developer. They allow developers to access functionalities or data from external services without having to build those functionalities themselves. This is commonly used for tasks such as authentication (e.g., social login via Google or Facebook), payment processing (e.g., Stripe or PayPal), mapping (e.g., Google Maps API), sending emails (e.g., SendGrid), and accessing social media data (e.g., Twitter API).