How would you organize an automated test chain to verify an API?

To organize a chain of automated API tests, the following approach can be used:

1. Unit tests — check individual functions or methods that form the API.
2. Integration tests — verify interaction between API components and external services.
3. End-to-end tests — simulate real usage scenarios of the API.

For automation, tools like Postman with Newman, REST-assured (Java), or pytest with requests (Python) can be used. Tests are usually run in a CI/CD pipeline to verify the API with each code change.

Example 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 data['id'] == 1

This approach ensures quick and reliable API quality control.