Item searchget https://marketplace.walmartapis.com/v3/items/walmart/searchQuery ParamsquerystringupcstringgtinstringasinstringresponseFormatstringenumDefaults to DEFAULTSPECSPECDEFAULTAllowed:SPECDEFAULTHeadersWM_SEC.ACCESS_TOKENstringrequiredWM_CONSUMER.CHANNEL.TYPEstringWM_QOS.CORRELATION_IDstringrequiredWM_SVC.NAMEstringrequiredWM_MARKETstringenumrequireduscamxclAllowed:uscamxclWM_GLOBAL_VERSIONstringenumrequired3.1Allowed:3.1Responses 200Successful Operation. HTTP 200 is returned for all non-error cases, including no match found. When no items match, the response is an empty JSON object {}.