api_key: ********************
X-Api-Key: ********************
curl --location --request GET 'https://app.sellerassistant.app/api/v1/sp-api/definitions/2020-09-01/productTypes?keywords=luggage,bag&itemName&locale=en_US&searchLocale=en_US&domain=amazon.com&marketplaceId=ATVPDKIKX0DER&api_key=<api-key>'
{ "productTypes": [ { "name": "LUGGAGE", "displayName": "Luggage" } ], "productTypeVersion": "LATEST" }