in our fetch api every field comes with ok / absent / failed. it never returns a bare null and lets you/your agent assume. credit is not charged in case the api

in our fetch api every field comes with ok / absent / failed. it never returns a bare null and lets you/your agent assume. credit is not charged in case the api returns absent value. for ask api, the null is shown to the model as value: NULL plus an instruction — "acknowledge the gap explicitly. do not state, estimate, or infer a value for it from general knowledge or from the coordinate." so models never make any data up. empty fields are rare on houses and commercial lots (~5%) and common on rural land (~29%), but on rural land empty usually means "nothing's there," while on houses and lots it usually means "the county didn't publish it.