APIs (Application Programming Interfaces) act as bridges between applications, enabling them to exchange data and functionality without exposing internal logic. They are essential for tasks like payment processing, weather updates, or social media integrations, saving development time and improving scalability.

Common API Types include:

• REST – Uses HTTP methods (GET, POST, PUT, DELETE) and returns JSON/XML.

• SOAP – XML-based, with strict contracts (WSDL), often used in enterprise systems.

• GraphQL – Lets clients request exactly the data they need.

• gRPC – High-performance, binary protocol using HTTP/2, ideal for microservices.

Basic Steps for Integration:

1. Read API Documentation – Understand endpoints, authentication, and data formats.

2. Obtain Credentials – Use API keys, OAuth tokens, or JWT for authentication.

3. Make Requests – Choose the correct HTTP method: GET → Retrieve data POST → Create data PUT/PATCH → Update data DELETE → Remove data

4. Handle Responses – Parse JSON/XML and implement error handling.