GetExternalContactAction returning 404 on valid phone numbers

Architect & Flows
1

Trying to look up a customer record using the GetExternalContactAction in Architect, but it’s consistently failing with a 404. The external integration endpoint works fine when I hit it directly via Postman with the same payload.

Here’s the data action config:

{
 "integrationId": "my-crm-integration",
 "action": "lookup",
 "parameters": {
 "phone": "{{ trigger.phoneNumber }}"
 }
}
  • Architect Data Action: GetExternalContactAction
  • Integration: HTTP POST to internal CRM
  • Phone format: E.164 (+81…) passed in trigger
  • Direct API call returns 200 OK with JSON body
  • Architect logs show status code 404 and empty body

Checked the logs and the payload looks correct. Anyone else see this?