One of the common methods of attacking APIs are weak authentication and poor authorization controls. If digital tokens are not properly secured or very lax access rules are in place, the malicious actors can easily traverse the systems without being caught. A robust API Penetration Testing Checklist allows the organizations to thoroughly check these essential areas, reveal the secret access vulnerabilities, and verify that only the authorized users and systems have access to the sensitive data. Addressing this point early on helps a lot in the areas of breach risk, compliance, and goodwill of the business in the long run.