I wanted to sell a small digital product without building accounts, checkout pages, license-key emails, or a database of customers. The product was straightforward: a ZIP archive containing 300 English and Latin American Spanish game UI messages, plus JSON, CSV, Godot localization files, a validator, and a commercial license. The awkward part was delivery. A download link alone is useful to a person, but an agent also needs to discover the product, inspect the price, pay, and retrieve the res...