What tool or framework would you prefer to use for automated API testing?

Tools and frameworks such as Postman (with its automation capabilities through Collection Runner and Newman), as well as specialized libraries for programming tests, are often used for automated API testing. For example, RestAssured for Java, pytest + requests for Python, or Supertest for Node.js.

The choice depends on the tech stack and project requirements. For quick REST API checks, Postman is suitable, while for integrating tests into CI/CD, it's better to write tests in a programming language using appropriate libraries.

Here's an example of a simple test in Python using pytest and requests:

import requests

def test_get_user():
    response = requests.get('https://api.example.com/users/1')
    assert response.status_code == 200
    data = response.json()
    assert 'id' in data and data['id'] == 1