# Limits ### Creating and updating products * There is no bulk endpoint. Every create, update or delete call handles exactly one product (one size), so a product group with five sizes takes five calls. * `PATCH /api/rest/v1/retailer/products/{code}/attribute/{attribute_code}` changes exactly one value per call. * Changes to the same product or product group are processed one at a time. A call waits up to 10 seconds for a change that is already in progress; if it cannot start in that time it is answered with `409` and nothing is saved. Send the sizes of one product group one after another rather than at the same moment. ### Lists * `GET /api/rest/v1/retailer/products` returns at most 100 products per page (`limit`, default 10). * Categories, attributes and attribute options are returned in one response, without pagination. ### Request rate * There is no limit on the number of requests per second or per day.