This whitepaper introduces the API Security Maturity Model as a practical framework to help organizations assess and improve their API security programs as API usage and attack activity grow. It defines five maturity stages, from early API learning to fully API-first and cloud-native operations, and evaluates each stage across API adoption indicators and security practices. The model shows that traditional controls like WAFs and gateways provide limited protection as APIs scale and business logic abuse becomes the dominant threat. As maturity increases, organizations progress toward continuous API discovery, schema-driven governance, runtime behavioral analysis, and integration with SecOps workflows. The paper emphasizes that API security maturity is iterative, requires cross-functional co

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