Anthropic (Claude) action returns "messages: Input should be a valid list" error on every request

Hi team,

I'm trying to use the native **Anthropic (Claude) → Create Message** action in one of my workflows (spam email classification). Every test request returns this error from Claude's API:

{
"type": "error",
"error": {
"type": "invalid_request_error",
"message": "messages: Input should be a valid list"
},
"request_id": "req_011CaFgG3tQz8mvyVt1fBANc"
}

Can you confirm whether this is a known bug with the native Anthropic integration's payload builder?

Thanks!

Hello @apremierdj,

Thank you for bringing this to our attention.

We have escalated this issue to our concerned team for further review. Kindly allow us some time to investigate this, and we will get back to you with an update as soon as possible.

We appreciate your patience in the meantime.

Hello @apremierdj,

The reported issue has now been resolved. Please try executing the Anthropic (Claude) → Create Message and let us know how it goes.