Good to know

Prices, permissions, active plan, immediate changes and images: the rules that hold across the whole API.

Prices are whole units of the restaurant currency, never cents: 12500 is 12,500 pesos, 5.99 is US$5.99. The currency comes in restaurant.currency.
Changes are immediate and show up on the public menu just as if you had made them in the dashboard. There is no draft and no publish button.
A restaurant without an active plan (subscription or trial) answers 402 on every endpoint that takes a key, just as the dashboard shows the subscription notice.
Permissions are per key. A read-only key gets 403 on any write, with the WWW-Authenticate header saying which permission is missing.
Editing many products at once takes a single request, up to 50 per call.
Images are sent as a public URL (JPG, PNG or WEBP, up to 5 MB). Delimenu downloads it, optimizes it and answers once the photo is ready, so those calls take a few seconds.
Revoking a key in the dashboard cuts off access on the next request.