Rye

Rye provides commerce infrastructure that lets developers add product data and checkout to their applications without integrating with each merchant individually. Its Universal Checkout API works from a simple contract: given a product page URL, buyer information, and a tokenized payment method, Rye returns true landed costs and then places and tracks the order with the underlying merchant, abstracting away the differences between storefronts and platforms. This allows a wide range of products from across the web to be bought programmatically inside a third-party experience, whether that is a shopping app, a content site with buyable links, a rewards program, or an AI assistant completing a purchase on a user's behalf. Rye has focused heavily on agentic commerce, working to make automated checkout reliable and fast enough for AI agents, and it publishes metrics on offer generation time, checkout time, and reliability on major platforms like Shopify. It also offers product data endpoints for pulling catalog information and pricing. Rye is aimed at developers and companies building commerce features rather than at merchants running a store. It is sold with a paid developer plan that includes monthly credits plus per-order and per-product-fetch fees, and custom enterprise pricing for higher volumes.