Postman

API testing, collections, and automation for REST and GraphQL

🐧 Linux🍎 Mac🪟 Windows

Reviewed: 2026-06|Tested on: Kubernetes 1.29 · Terraform 1.8 · Ubuntu 22.04

What is this?

Postman tests REST and GraphQL APIs — send requests, save collections, and automate with Newman.

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Step 01

Install Postman

(01)Install Postman

Linux

1sudo snap install postman
2# Or: flatpak install flathub com.getpostman.Postman

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Step 02

Configure Postman

(01)Configure Postman

Linux

1# Create environment variables in Postman UI
2# Run collection with Newman (CLI):
3npm install -g newman
4newman run collection.json -e environment.json

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Step 03

Verify

(01)Verify installation

Linux

1newman --version
2curl --version

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Step 04

Common Problems

#1SSL certificate error in requests

Linux

1# Postman Settings → turn off SSL verification (dev only)
2# Or add CA cert under Settings → Certificates