REST API (Representational State Transfer Application Programming Interface) is a set of rules and conventions for building and interacting with web services. It uses standard HTTP methods like GET, POST, PUT, and DELETE to perform operations on resources identified by URLs, enabling systems to communicate over the internet in a scalable and stateless manner.
Developers use REST APIs to connect frontend and backend systems, integrate third-party services, or enable mobile and web applications to access server-side data. This skill is essential in modern software development, particularly in cloud-based and microservices architectures where decoupled components must exchange data efficiently and securely.
- Design and implement API endpoints using HTTP methods
- Structure responses in JSON or XML format
- Ensure security with authentication methods like OAuth or API keys
- Document APIs for developer use with tools like OpenAPI or Swagger
- Test and debug endpoints using tools such as Postman or curl
- Follow REST constraints including statelessness, cacheability, and uniform interface
REST API development is commonly used by software engineers, backend developers, and API specialists in industries including technology, finance, healthcare, and e-commerce. Professionals with this skill are expected to understand HTTP protocols, status codes, and web security practices. They should also be proficient in server-side languages such as Node.js, Python, Java, or PHP, and frameworks that support RESTful design. Mastery of versioning, rate limiting, and error handling in APIs is also critical for production environments.
