Postman: REST API Testing — Valentin Despa

Despa teaches API testing through HTTP methods, Postman variables, JavaScript assertions, data files, and authentication. Mocks and command-line execution connect a saved request to repeatable checks. It is useful for understanding both what an API returns and whether that response meets an explicit expectation.

What you will learn

• Create and compare HTTP requests
• Write assertions with variables and data files
• Explore authentication, mocks, and automated runs

Who this suits

Suitable for a beginner to Postman who is ready to learn HTTP and introductory test scripting. Use a local or provided practice API so requests can be repeated without affecting unrelated services.

Before you enroll

Postman plans and interfaces change. Do not place real access tokens or private data in public workspaces. External API permissions and rate limits still apply; the time filter describes an extended study route, not a verified runtime.

Enrollment is paid through Udemy. A completion certificate follows Udemy's course terms; it does not confer a professional qualification. Check current pricing and access before enrolling.

Put it into practice

Build a collection for a practice API with one success, one invalid input, and one unauthorized request. Assert the important response fields and document why a successful status alone is insufficient.

Source and review

This overview is based on the provider's published information, checked on 11 October 2026. It is an editorial assessment, not a claim that we completed the resource. Time filters are approximate study ranges; projects and exercises can take longer.

View the curriculum and current access options at Udemy.

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