This paper explains how the travel and hospitality industry relies on APIs for bookings, payments, and customer service, making the protection of sensitive customer and payment data essential. It outlines a compliance landscape that includes PCI DSS requirements for securing cardholder data, GDPR obligations when handling EU personal data, ISO/IEC 27001 and 27017 guidance for cloud data protection, and the MITRE ATT&CK framework for understanding API-specific attack techniques. Key security needs include secure payment processing, encryption, strong authentication, input validation, continuous monitoring, and regular vulnerability assessments. The paper emphasizes API posture governance as critical for maintaining continuous compliance, preventing misconfigurations, detecting fraud, and pr

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