PDPA 2012: Personal Data Protection Act - Primary legislation governing the collection, use, disclosure and care of personal data in Singapore

Computer Misuse Act: Legislation addressing cybercrime and unauthorized access to computer systems, relevant for API security requirements

Electronic Transactions Act: Provides legal foundation for electronic transactions and digital signatures in Singapore

Cybersecurity Act 2018: Framework for the protection of Critical Information Infrastructure (CII) and cybersecurity requirements

PDPA Guidelines: Detailed guidelines on implementing data protection measures in compliance with PDPA

Cross Border Data Transfer Requirements: Regulations governing the transfer of data outside of Singapore's borders

IMDA Cloud Guidelines: Guidelines by Info-communications Media Development Authority for cloud service security and agreements

Consumer Protection Act: Fair Trading Act protecting consumers against unfair practices in service agreements

Unfair Contract Terms Act: Legislation controlling the use of unfair terms in contracts and agreements

Technology Risk Management Guidelines: MAS guidelines for managing technology risks, particularly relevant if the API involves financial services

Singapore Contract Law: Common law principles governing contract formation, execution, and enforcement in Singapore

Electronic Contracts Framework: Legal framework specifically addressing the formation and validity of electronic contracts

Industry-Specific Regulations: Sector-specific compliance requirements depending on the API's application domain (healthcare, finance, etc.)