Postman is available for macOS, Windows, and Linux as native desktop apps. Windows requires 64-bit x86 architecture, v9.4 is last version supporting both. Mac requires macOS 10.15+ and Apple Silicon version. Linux supports Ubuntu 18.04+, Fedora 32+, and Debian 10+
Variables enable storing and reusing values across collections and requests. Variables are key-value pairs that can be referenced throughout requests. Variables can be defined without scope for testing purposes
API endpoint serves as the point of contact between client and server. Typical REST APIs have endpoints for various resources. Requests must include method, headers, parameters, authentication, and body data
API key is a unique string used for client authentication and API access. API keys are issued by providers and included with each request. API keys are less secure than OAuth and JWT but still important for monitoring
API testing shows 405 error for POST method, works fine with GET. Parameters tested on different platform
HTTP headers provide additional information between client and server. Headers have key-value pairs format and can be added to requests and responses. Examples include authorization, content type, and cookies