# Order data extension

An order data extension is an object that lets you specify any key-value pairs you want. Order data extensions are optional and enable your organization to capture more robust information about your orders.

 To get started with this API, create a data extension for the order you previously created.

 - [POST /v2.1/orders/{orderRef}/extensions/{dataExtensionName}](https://api-docs.sitecore.com/cdp/order-rest-api/order-data-extension/createorderdataextension.md): Creates an order data extension. To avoid creating key-value pairs that already exist in the data extension for an order, first retrieve all the data extensions for an order to check that the keys you
 - [GET /v2.1/orders/{orderRef}/extensions/{dataExtensionName}](https://api-docs.sitecore.com/cdp/order-rest-api/order-data-extension/retrieveorderdataextension.md): Retrieves a data extension for an order.
 - [PUT /v2.1/orders/{orderRef}/extensions/{dataExtensionName}](https://api-docs.sitecore.com/cdp/order-rest-api/order-data-extension/putorderdataextension.md): Fully updates a data extension for an order, replacing the entire resource including all the key-value pairs with the data you send in the request. To update certain key-value pairs only, use the Par
 - [PATCH /v2.1/orders/{orderRef}/extensions/{dataExtensionName}](https://api-docs.sitecore.com/cdp/order-rest-api/order-data-extension/updateorderdataextension.md): Partially updates a data extension for an order, replacing only those key-value pairs in the resource that you provide in the request.
 - [DELETE /v2.1/orders/{orderRef}/extensions/{dataExtensionName}](https://api-docs.sitecore.com/cdp/order-rest-api/order-data-extension/deleteorderdataextension.md): Deletes the data extension for an order, including all the key-value pairs in the data extension. To delete certain key-value pairs only, use the Delete key-value pairs from a data extension endpoint
 - [DELETE /v2.1/orders/{orderRef}/extensions/{dataExtensionName}/fields](https://api-docs.sitecore.com/cdp/order-rest-api/order-data-extension/deleteorderdataextensionfields.md): Deletes the key-value pairs you provide in the `name` query parameter from a data extension for an order. For example, if your data extension contains the `firstTimeOrder` and `storeLocation` keys, yo
 - [GET /v2.1/orders/{orderRef}/extensions](https://api-docs.sitecore.com/cdp/order-rest-api/order-data-extension/retrieveorderdataextensions.md): Retrieves the URL for the order's data extension. This lets you check if the data extension exists.