Introduction & Industry Context

As backend architectures have shifted from monoliths to microservices, edge workers, and event-driven topologies, APIs have become the primary surface area for digital interactions. This architectural evolution has shifted the security landscape dramatically. Traditional web application firewalls (WAFs), designed to inspect payload signatures for classical vulnerabilities like SQL injection or cross-site scripting, are fundamentally blind to the business-logic flaws that dominate modern system attacks.

In 2026, API security is no longer an afterthought or a compliance checkbox. The OWASP API Security Top 10 highlights a shift toward logical vulnerabilities, authorization breakdowns, and resource exhaustion vectors. Attackers bypass simple perimeter defenses to exploit how endpoints process, parse, and scope data.…