Postman is an API platform for developers to design, build, test, and iterate their APIs. Postman supports Windows, macOS and Linux operating systems. Postman proxy is an intermediate server that sits between a client application (such as Postman) and the target server (such as an API) that the client communicates with. A proxy server acts as a security barrier, making requests to websites and other Internet resources on your behalf and preventing others from accessing your internal network. The article will show you how to do Postman proxy settings with Okey Proxy.