Note: Please note that any eBay listing created using the Inventory API cannot be revised or relisted using the Trading API calls.
Note: Each listing can be revised up to 250 times in one calendar day. If this revision threshold is reached, the seller will be blocked from revising the item until the next calendar day.
This call creates a new inventory item record or replaces an existing inventory item record. It is up to sellers whether they want to create a complete inventory item record right from the start, or sellers can provide only some information with the initial createOrReplaceInventoryItem call, and then make one or more additional createOrReplaceInventoryItem calls to complete all required fields for the inventory item record and prepare it for publishing. Upon first creating an inventory item record, only the SKU value in the call path is required.

Important!Publish offer note: Fields may be optional or conditionally required when calling this method, but become required when publishing the offer to create an active listing. For this method, see Inventory item fields for a list of fields required to publish an offer.

Note: In addition to the authorization header, which is required for all Inventory API calls, this call also requires the Content-Type and Content-Language headers. See the HTTP request headers for more information.
In the case of replacing an existing inventory item record, the createOrReplaceInventoryItem call will do a complete replacement of the existing inventory item record, so all fields that are currently defined for the inventory item record are required in that update action, regardless of whether their values changed. So, when replacing/updating an inventory item record, it is advised that the seller run a getInventoryItem call to retrieve the full inventory item record and see all of its current values/settings before attempting to update the record. And if changes are made to an inventory item that is part of one or more active eBay listings, a successful call will automatically update these eBay listings.

The key information that is set with the createOrReplaceInventoryItem call include:

Seller-defined SKU value for the product. Each seller product, including products within an item inventory group, must have their own SKU value. This SKU value is passed in at the end of the call URI
Condition of the item
Product details, including any product identifier(s), such as a UPC, ISBN, EAN, or Brand/Manufacturer Part Number pair, a product description, a product title, product/item aspects, and links to images. eBay will use any supplied eBay Product ID (ePID) or a GTIN (UPC, ISBN, or EAN) and attempt to match those identifiers to a product in the eBay Catalog, and if a product match is found, the product details for the inventory item will automatically be populated.
Quantity of the inventory item that is available for purchase
Package weight and dimensions, which is required if the seller will be offering calculated shipping options. The package weight will also be required if the seller will be providing flat-rate shipping services, but charging a weight surcharge.

In addition to the authorization header, which is required for all eBay REST API calls, the createOrReplaceInventoryItem call also requires the Content-Language header, that sets the natural language that will be used in the field values of the request payload. For US English, the code value passed in this header should be en-US. To view other supported Content-Language values, and to read more about all supported HTTP headers for eBay REST API calls, see the HTTP request headers topic in the Using eBay RESTful APIs document.

For those who prefer to create or update numerous inventory item records with one call (up to 25 at a time), the bulkCreateOrReplaceInventoryItem method can be used.

Types that use BulkMigrateListing

Call that uses BulkMigrateListing

Fields