API product management is a burgeoning role in both startups and enterprises, focusing on building and managing API platforms. Successful candidates should not only be adept product managers but also passionate about APIs and developer support. Key competencies for API PMs include understanding effective developer onboarding, selecting meaningful metrics for product success, and creating a well-balanced feature roadmap that considers market trends and customer feedback. API PMs must handle API versioning and deprecation carefully to avoid disrupting users, employing strategies like maintaining backward compatibility and effective communication. They should also be adept at segmenting developer communities based on relevant attributes and crafting comprehensive, up-to-date documentation using tools like OpenAPI. Additionally, API PMs should leverage analytics to measure API usage and value, and possess skills in data modeling to design efficient APIs for various use cases, such as eCommerce.