API sprawl refers to the unchecked expansion of APIs, a common issue in decentralized development environments, especially within microservices architectures where different teams independently create APIs leading to redundant and inconsistent functionalities. This phenomenon is exacerbated by factors such as the absence of central oversight, inadequate documentation, rapid team growth, and lack of standardized design protocols, resulting in increased security risks, redundant development efforts, and integration challenges. Effective management of API sprawl involves strategies like establishing comprehensive API visibility through a centralized catalog, implementing flexible governance frameworks, assigning clear ownership, and defining API lifecycles to ensure efficient usage and prevent technical debt. Tools like Blackbird can aid in maintaining control by automating the discovery and documentation of APIs, offering a centralized source of truth that enhances visibility and reduces operational burdens, ultimately allowing for responsible growth and innovation in API development.