MCP Streamable HTTP endpoint — online supermarket delivery (JSON-RPC 2.0)

SuperMCP remote server for groceries delivered to an address, exposing optimize_delivery, list_delivery_options, get_delivery_terms, search_products, get_product, suggest_similar_products, get_promotions. Ranks storefronts on what the ORDER costs (items + delivery fee + service fee), not what the goods cost, because a ₪35.90 delivery fee outweighs most price differences between chains. Online prices are not shelf prices: each storefront's own regulated feed rows are used. Delivery fees carry a confidence and a verifiedAt — a fee marked unknown must not be quoted. This is the only MCP surface. No credential is required, and sending one is what produces a 401 here.