Master Postman: From GET to DELETE Requests and Variable Management

Introduction

Postman organizes tests into Collections, which group multiple requests for easier management.

Official Links

Documentation: https://www.getpostman.com/docs/v6

API docs: https://docs.api.getpostman.com/

Test site: https://www.postman-echo.com

POSTMAN Request Testing

GET Request

Basic GET format: https://www.postman-echo.com/get?name=george&age=25 (parameters after “?” separated by “&”).

Bulk edit supports multi‑line editing; comments can be added with “//”.

POST Request

Body Options

none : No body; parameters can be placed in the URL.

multipart/form-data : Simulates HTML form submission, allows key‑value pairs and file uploads (choose FILE type for file values).

x-www-form-urlencoded : Sends URL‑encoded key‑value pairs; cannot upload files.

raw : Sends raw text (e.g., JSON, JavaScript) with optional Content‑Type header.

binary : Sends binary data such as video, audio, or images.

PUT Request

PUT replaces the target resource on the server with the data sent from the client.

DELETE Request

DELETE removes the specified resource on the server.

Custom Headers and Console

Headers

Headers convey additional information such as Cookie, Referer, User‑Agent, etc. They can be set in Postman’s Request Header panel.

Console

The console (accessed via the menu) displays request and response details and is useful for debugging.

Variable Types in Postman

Global variables – available to all URLs and environments.

Environment variables – scoped to a selected environment (e.g., dev, prod).

Local variables – defined for a single request via scripts (e.g., pm.variables.set("user","51zxw")).

Data variables – loaded from external JSON/CSV files for data‑driven testing.

Variable Priority

If variables share the same name, the one with higher scope overrides lower ones. Priority from lowest to highest: Global → Environment → Local → Data.