addItems

post

https://api.business.amazon.com/cart/2025-04-30/carts/{cartId}/items

Adds items to the cart.

Usage Plan:

Rate (requests per second)	Burst
2	2

The x-amzn-RateLimit-Limit response header returns the usage plan rate limits that were applied to the requested operation. The preceding table indicates the default rate and burst values for this operation. For questions about your usage plan, reach out to your Amazon Business technical contact.

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region must be set to US. Selecting any other region will return an error.

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To test this API, populate the input fields below with values from the following sample.
Example #1 - Click to expand
{  
 "items": [  
   {  
     "productIdentifier": "Asin1",  
     "buyingOptionIdentifier": "OId1",  
     "quantity": 1,  
     "externalId": "client-item-001"  
   }  
 ]  
}  

Responses

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200The items were successfully added to the cart.

400Request has missing or invalid parameters and cannot be parsed.

403Indicates that access to the resource is forbidden. Possible reasons include Access Denied, Unauthorized, Expired Token, or Invalid Signature.

404The resource specified does not exist.

413The request size exceeded the maximum accepted size.

415The request payload is in an unsupported format.

429The frequency of requests was greater than allowed.

500An unexpected condition occurred that prevented the server from fulfilling the request.

503Temporary overloading or maintenance of the server.