API Security Testing focuses on validating that only authenticated users can access protected endpoints using JWT tokens.
It verifies that valid tokens allow access, while missing or invalid tokens are correctly rejected, ensuring proper access control and security enforcement.
Step to Reproduce:
- Create secured API requests in Postman.
- example: POST https://api.escuelajs.co/api/v1/auth/login
- Login and obtain JWT token Access protected endpoint → success
- Remove Authorization token
- Send request again
API Security Testing Workflow

Security Testing Execution in Postman:

What This Demonstrates:
- API authentication enforcement
- Unauthorized access handling
- Negative testing approach
“Functionality shows what works. Security proves what must be protected”