The article explores JSON-RPC, a lightweight protocol using JSON for remote function calls. It highlights the simplicity and efficiency of JSON-RPC compared to other protocols like SOAP or REST. The article provides a hands-on guide on setting up a JSON-RPC server and client using Node.js and the jsonrpc-lite npm package, showcasing examples of adding numbers, greeting, and logging with notifications. It concludes by emphasizing JSON-RPC’s effectiveness for microservices, IoT, and applications requiring fast communication with servers.