Three-tier agricultural marketplace architecture connects farmers and buyers through React Native mobile interfaces backed by Node.js Express REST API. Authentication via JWT secures user accounts while business logic handles price comparison, sorting, and transaction management across produce listings. MongoDB stores user accounts, produce listings, transaction requests, and price history records, enabling real-time price discovery for agricultural commodities. Fork this diagram on Diagrams.so to customize the data model, add payment gateway integration, or extend the admin dashboard with analytics modules. Ideal template for agtech startups building direct farmer-to-buyer platforms with transparent pricing mechanisms.