A comprehensive introduction to API concepts, design, and architecture focusing primarily on REST APIs. Covers fundamental concepts like HTTP methods (GET, POST, PUT, DELETE, PATCH), JSON data format, endpoint structure, and URL design patterns. Explains different API types including REST, SOAP, GraphQL, gRPC, and WebSockets. Discusses practical aspects like passing data through paths, query parameters, and request bodies, along with proper security considerations. Introduces status codes and touches on advanced topics like pagination, authentication, and API documentation.
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