As Web APIs emerged as the fundamental technology to facilitate the interactions between organizations and their customers or partners, their ease of access and wide exposure demanded heightened attention on security and service availability. The adoption of the microservice infrastructural paradigm led industries to integrate API Gateways as central components responsible for managing and routing incoming requests to specific applications, as well as ensuring authentication of end-users, policy enforcement, logging, caching and monitoring. However, owning to their inherent monolithic design, they face the same challenges that prompted the shift towards decentralized infrastructures. Consistent with the trend, this thesis emphasizes a holistic approach to manage the entire lifecycle of Web APIs, embracing a new and innovative paradigm: the Microgateway Infrastructural Pattern.