API Testing Project — Postman (DummyJSON)

Hands-on API testing project to demonstrate REST API testing skills using Postman.

API under test

DummyJSON Auth: https://dummyjson.com/docs/auth

Scope

Tested endpoints:

• POST /auth/login — success (get access token)
• GET /auth/me — authorized request (Bearer token)
• POST /auth/login — negative case (invalid payload → 400)
• GET /products — list all products
• GET /products/1 — single product by ID
• GET /products/search?q=phone — product search
• GET /auth/me without token — 401 negative case

Artifacts

• Postman collection: postman/collection.json
• Environment template: postman/environment.example.json

How to run

1. Import the collection and the environment into Postman
2. Select environment qa_api_project
3. Run requests:
   • Login - success
   • GET current auth user
   • GET all products
   • GET product by ID
   • GET products search
   • Login - invalid payload
   • Authorisation without token

Results: 7 requests • auth flow • products endpoints • negative cases (401, 400)