Postman
Postman (Talk to APIs and See What’s Really Happening)
When you build or use modern software, you often work with APIs.
But APIs are invisible — you can’t “see” them like a website.
Postman lets you see and test APIs clearly.
What Is Postman?
Postman is a tool used to send requests to APIs and view the responses.
It helps you:
- test APIs
- understand how APIs work
- debug backend problems
- learn backend development
All without writing frontend code.
Why Engineers Use Postman
🔍 See API Responses Clearly
Postman shows:
- returned data
- status codes
- errors
- response time
This makes debugging easy.
🧪 Test Without Writing Code
You can test an API by:
- entering a URL
- choosing GET / POST / PUT / DELETE
- clicking Send
Perfect for beginners.
🧠 Learn How APIs Work
Using Postman teaches:
- request methods
- headers
- JSON data
- authentication
These are core backend skills.
🤝 Used in Real Projects
Postman is used by:
- backend developers
- frontend developers
- QA engineers
- DevOps teams
It’s an industry-standard tool.
Beginner Mental Model
Think of Postman as:
“A remote control for APIs.”
You press buttons and see how the server responds.
Simple Example
Send a request:
- Open Postman
- Enter an API URL
- Select
GET - Click Send
You instantly see the response.
How Top Engineers Use Postman
- Debug backend issues
- Test authentication flows
- Share API collections with teams
- Verify APIs before deployment
Same tool — deeper usage.