This practical workshop, titled "Introduction to API and Testing in Postman for QA Engineers", provides participants with foundational skills in API testing essential for quality assurance professionals. ​ Key Topics Covered HTTP methods (GET, POST, PUT, DELETE) and their practical applications. HTTP status codes: 2xx (success, e.g., 200 OK, 201 Created), 4xx (client errors, e.g., 400 Bad Request, 401 Unauthorized, 404 Not Found), and 5xx (server errors, e.g., 500 Internal Server Error). Parameter transmission: Query parameters (?key=value for filtering), Path parameters (/resource/{id} for specific objects), and Body (JSON payloads for POST/PUT). Authentication tokens: Usage in Authorization headers (Bearer token) and testing access levels (401/403 errors). Hands-on exercises in Postman: Building requests, validating responses, and verifying expected behaviors. Learning Outcomes Participants gain practical experience constructing API requests, interpreting responses, and identifying common testing pitfalls, such as incorrect status codes or unauthorized access. The session emphasizes QA responsibilities in ensuring API reliability.