FinTech Glossary

JSON API

A JSON API is an application programming interface that uses JavaScript Object Notation (JSON) as the format for exchanging data between software systems over the internet.

Understanding JSON APIs

JSON APIs are widely used in web and mobile applications to enable systems to communicate efficiently.

They allow one application to request data or trigger actions in another system using structured, lightweight messages.

Because JSON is human-readable and language-agnostic, JSON APIs are common in fintech platforms and digital services.

How a JSON API Works

A client application sends a request to an API endpoint using standard HTTP methods such as GET, POST, PUT, or DELETE.

The server processes the request and responds with data formatted in JSON.

The response includes structured key-value pairs that applications can easily parse and use.

Key Components of a JSON API

A typical JSON API includes:

1. API endpoints for specific functions
2. HTTP methods for different operations
3. Request and response bodies in JSON format
4. Authentication and authorization mechanisms
5. Error handling and status codes

These components ensure reliable and secure data exchange.