Price the visitor's delivery: one total (provider price, Nash fee and the form's tip) for the chosen store, strategy and vehicle, valid until expires_at (at most ten minutes). Creates one draft order tagged quotes_only; only the returned quote_id can be booked.

VALIDATION_ERRORS (422) maps body paths (store_id, recipient.phone, dropoff.lat, ...) to a static message in details.fields; a store, strategy or vehicle the form does not offer is one of them. ORDER_INTAKE_NO_QUOTES (409) when no provider quoted within the form's cap. Refusals are the uniform FORBIDDEN (403) or SESSION_EXPIRED (410); RATE_LIMITED (429) and ORDER_INTAKE_UNAVAILABLE (503) carry Retry-After.