Playwright API Testing Course: What to Learn and Where

Why API test with Playwright?

Most teams test their UI and their API with different tools: Selenium or Cypress for the browser, Postman or REST Assured for the API. Playwright handles both. The built-in request fixture sends GET, POST, PUT and DELETE calls with the same runner, reporter, retries and CI setup as your browser tests. That means one language, one framework and one pipeline.

It also makes UI tests faster and more stable: create test data through the API, then check it in the browser, instead of clicking through five screens of setup.

What Playwright API testing looks like

const { test, expect } = require('@playwright/test');

test('create a user, then fetch it', async ({ request }) => {
  const created = await request.post('/api/users', {
    data: { name: 'Ana', role: 'tester' },
  });
  await expect(created).toBeOK();
  const user = await created.json();

  const fetched = await request.get(`/api/users/${user.id}`);
  expect(await fetched.json()).toMatchObject({ name: 'Ana' });
});

Set baseURL and auth headers once in playwright.config.js and every test reuses them. More examples in our Playwright API testing guide.

The syllabus a Playwright API testing course should cover

1. The request fixture and APIRequestContext: GET, POST, PUT, PATCH, DELETE, headers and query parameters.
2. Assertions on responses: status codes, toBeOK(), JSON bodies and headers.
3. Authentication: tokens, API keys and reusing a logged-in state across UI and API tests.
4. Test data: creating and cleaning up data through the API before UI tests.
5. Schema validation: checking response shape with a JSON schema library.
6. Mocking: using page.route() to fake API responses in UI tests. See network interception.
7. Framework and CI: fixtures, config projects for API vs UI, and GitHub Actions.

Playwright vs Postman vs REST Assured for API testing

Postman is still great for exploring an API by hand. For automated regression tests that live next to your UI tests, Playwright saves you a second framework.

Do you need a separate API testing course?

Some providers sell Playwright API testing as its own course, usually in TypeScript, with deep coverage of schema and contract testing. That suits engineers who already have a UI framework and only need the API half.

If you're starting out or moving from manual testing, one course that covers UI and API together is usually better value: the fixtures, config, reporting and CI are shared, so you learn them once. Job listings increasingly ask for both. See Playwright API automation jobs.

What our Playwright + Claude AI course covers

It isn't an API-only course: API testing is taught as part of one Playwright framework. For deeper schema and contract testing, practise with the patterns in the API testing guide once you've finished.

Frequently Asked Questions