Practice: Inspect Real API Calls

Time to put everything together. You're going to inspect real API calls on the Banking Portal using your browser's Developer Tools. This is how senior testers debug issues in production — they open DevTools and watch the APIs.

Exercise 1: Watch API Calls in DevTools

Exercise 2: Analyze an API Call

For each API call you see, write down these details:

API Call #1:
  URL: ___
  Method: GET / POST / PUT / DELETE
  Status Code: ___
  Request Headers: Content-Type = ___, Authorization = ___
  Request Body: (if POST/PUT)
  Response Body: (first 3 fields)
  Response Time: ___ ms

API Call #2:
  (same format)

API Call #3:
  (same format)

Exercise 3: Try curl on JSONPlaceholder

Open your terminal and run these commands. After each one, identify the status code, the number of items returned, and one field from the response.

1. GET all todos: curl -s https://jsonplaceholder.typicode.com/todos | python3 -m json.tool | head -20
2. GET a single todo: curl -s https://jsonplaceholder.typicode.com/todos/1 | python3 -m json.tool
3. GET only completed todos for user 1: curl -s "https://jsonplaceholder.typicode.com/todos?userId=1&completed=true" | python3 -m json.tool
4. Create a new todo: curl -s -X POST https://jsonplaceholder.typicode.com/todos -H "Content-Type: application/json" -d '{"title": "Learn API testing", "completed": false, "userId": 1}' | python3 -m json.tool
5. Check the verbose output: curl -v https://jsonplaceholder.typicode.com/todos/1 2>&1 | head -20