Postman API Testing

How I Got Into It

I learned this through client projects, which is usually a more direct teacher than any tutorial. Once APIs start failing in real work, you learn very quickly why guessing is not enough.

That is where Postman became useful to me. It gave me a way to inspect what was actually happening instead of trusting what I hoped was happening.

The Learning Process

The difficult part was getting comfortable with the details that break requests: headers, tokens, payload shape, query params, weird response bodies, and small mistakes that waste a lot of time when you do not know where to look.

It taught me to slow down and verify things properly.

How I Use It Now

I use Postman to test routes, integrations, webhooks, and anything else where I want to see the raw request and response clearly. It is useful around Supabase, Next.js routes, and workflows connected through n8n Workflow with VPS.

It is one of those tools that saves time mostly by preventing bad assumptions.

What It Changed

It made backend and integration work feel less vague. Instead of treating APIs like an invisible layer behind the app, I could look directly at what they were doing.

That changed my confidence a lot, especially in client work where mistakes at the integration layer can quietly waste hours.

Related

Supabase · Next.js · Node.js · n8n Workflow with VPS · GitHub