How do API-based templates rely on complete API coverage?

API-based templates are front ends that consume the platform's APIs directly for everything they show and do — products, cart, checkout, account, and so on. They therefore rely on complete API coverage: if any capability lacked an endpoint, an API-based storefront couldn't perform it. This is precisely why full coverage is mandated. It's what makes truly headless storefronts viable on…

API-based templates are front ends that consume the platform's APIs directly for everything they show and do — products, cart, checkout, account, and so on. They therefore rely on complete API coverage: if any capability lacked an endpoint, an API-based storefront couldn't perform it. This is precisely why full coverage is mandated. It's what makes truly headless storefronts viable on Okommerce — the API can drive the entire customer experience, so a developer can build any front end against it.