WAL-MART department category of item top sellers,Call GET All Departments API to return a list of all department names and department IDs.For example,Call:/v3/utilities/taxonomy/departments This call return all department names and IDs in JSON Format Example:Get all departments {“superDepartment”:”PETS AND SUPPLIES”,”superDepartmentId”:”47000″,”departments”:[{“departmentName”:”LARGE PET DURABLES”,”departmentId”:”47010″},{“departmentName”:”CAT FOOD”,”departmentId”:”47011″},{“departmentName”:”SMALL PET DURABLES”,”departmentId”:”47015″},{“departmentName”:”DOG FOOD”,”departmentId”:”47002″}]}Get All Categories API and specify the departmentId.For Example:/v3/utilities/taxonomy/departments/1021082 Example:All category names in Audio {“status”:”SUCCESS”,”payload”:{“departmentName”:”AUDIO”,”departmentId”:”1021082″,”categories”:[{“categoryName”:”HEAD PHONE L3″,”categoryId”:”1021180″},{“categoryName”:”HOME THEATER L3″,”categoryId”:”1021183″},{“categorName”:”AUDIO HARDWARE”,”categoryId”:”1021172″},{“categoryNane”:”MP3 PLAYERS L3″,”categoryId”:”1021181″},{“categorName”:”SPEAKERS L3″,”categoryId”:”1021182″}]}To get the best sellers in Audio department,call:/v3/insights/items/trending?departmentId=1021082 Example:Top 3 best sellers in Audio {“departmenName”:”AUDIO”,”categoryName”:”HEAD PHONES L3″,”productName”:”APPLE Airport Pro”,”subCategoryName”:”WIRELESS HEADPHONES”,”isTwoDayEligible”:1,”itemId”:”520468661″,”totalOffers”:9,”superDepartmentName”:”72 ELECTRONICS”,”existsForSeller”:0,”rank”:1,”brand”:”Apple”},{“departmentName”:”AUDIO”,”categoryName”:”SPEAKERS L3″,”productName”:”JBL Flip Essential BlueTooth Speakers”,”subCategoryName”:”WIRELESS SPEAKERS”,”isTwoDayEligible”:0,”itemId”:”368861200″,”totalOffers”:0,”superDepartmentName”:”72 ELECTRONICS”,”existsForSellsr”:0,”rank”:2,”brand”:”JBL”},{“departmentName”:”AUDIO”,”categoryName”:”HEAD PHONES L3″,”productName”:”onn.True Wireless Earphones,White”,”subCategoryName”:”IN EAR HEADPHONES”,”isTwoDayEligible”:1,”itemId”:”283162082″,”totalOffers”:1,”superDepartmentName”:”72 ELECTRONICS”,”existsForSellsr”:0,”rank”:3,”brand”:”onn.”}The top trending items within the Audio department specifically headphones category,call:/v3/insights/items/trending?departmentId=1021082&categoryId=1021180 Example:Top trending items by department category {“departmenName”:”AUDIO”,”categoryName”:”HEAD PHONES L3″,”productName”:”Apple AirPods Pro”,”subCategoryName”,”WIRELESS HEADPHONES”,”isTwoDayEligible”:1,”itemId”,”520468661″,”totalOffers”:9,”superDepartmentName”:”72 ELECTRONICS”,”existsForSellsr”:0,”rank”:1,”brand”:”Apple”},{“departmentName”:”AUDIO”,”isbn”:””,”categoryName”:”HEAD PHONES L3″,”productName”:”onn.True Wireless Earphones,White”,”subCategoryName”:”IN EAR HEADPHONES”,”isTwoDayEligible”:1,”itemId”:”283162082″,”totalOffers”:1,”superDepartmentName”:”72 ELECTRONICS”,”existsForSellsr”:0,”rank”:3,},