ITEMSUnderstanding the requirements for listing an itemGet item setup requirementsMarket availability: US only EndpointRequest sampleRequest bodyModify your codeRetrieve spec for a single product type (recommended)Retrieve spec for multiple product types (batch up to 20)Reduce retries by validating product types firstWhen you need the full schemaResponse sample (200)Response sample (207)ResultError handling400 Bad Request500 Invalid parameter / system errorNext steps
