Has anyone successfully migrated to the new API version for Amazon Selling Partner? I was testing it today and after much troubleshooting with assistance from Ora and ChatGPT I'm not having any luck. It's either returning no results or I'm getting this error:
{
"code": "not_supported",
"message": "The flag "useMWSDataFormat" is not yet supported for the endpoint: "".",
"occurredAt": 1778539817059,
"resolved": false,
"source": "resource"
}
URI - https://sellingpartnerapi-na.amazon.com/orders/2026-01-01/orders?marketplaceIds=**********&createdAfter=2026-05-01T00:00:00Z&maxResultsPerPage=100
Paging - I updated it according to documentation but that shouldn't affect the preview
Path to records - /orders (returns error) orders (returns nothing)
Connection:
I'd appreciate any assistance here. Thanks!
Could this be the issue? When I delete the mwsAuthToken, it authenticates but automatically adds it back. Seems like it's on the Celigo side of things. Not pointing fingers 
Hi Chris,
I tried making the same API call on my end and didn’t run into issues with the response, so the endpoint itself seems to be working as expected.
Regarding the mwsAuthToken object, even though it appears to get added back into the connection, it isn’t actually referenced or used in how the Amazon SP connection operates. So it’s unlikely to be the root cause of the error you’re seeing.
Given that, this might be something specific to how the connection is configured in your flow. I’d recommend raising a ticket with Celigo support so we can take a closer look at your setup and help pinpoint what’s going wrong.
Thank you
Hi Chris, I've raised a support ticket on your behalf, so someone from the support team should reach out to you, and take a look at this.
Thank you both for your help!
