"Failed to transform underlying error response, see logs" error when use EBay API

Question

I'm trying to search products by ID using "https://api.ebay.com/buy/browse/v1/item/v1|313672711737|0" endpoint. This is working find on EBay API explorer but when I try this with PostMan it is giving this response.

{
  "errors": [{
    "errorId": 2003,
    "domain": "ACCESS",
    "category": "APPLICATION",
    "message": "Internal error",
    "longMessage": "There was a problem with an eBay internal system or process. Contact 
    eBay developer support for assistance",
    "parameters": [{
    "name": "reason",
      "value": "Failed to transform underlying error response, see logs."
    }]
  }]
}

I have passed these headers

'X-EBAY-C-MARKETPLACE-ID: EBAY_US',

Authorization: Bearer XXXXXXXXXXX

Any idea about this error?

developer_support@ebay · Accepted Answer

Hi @romfern13

It seems like you are not URL encoding the request parameters. Please make sure to encode the Query parameters.

For readability, the method examples in this document are not encoded. For more information about encoding, see URL encoding query parameter values