curl --request POST \
  --url https://api.agentixx.io/api/agents/{id}/chat \
  --header 'Content-Type: application/json' \
  --header 'x-tenant-id: <api-key>' \
  --cookie better-auth.session_token= \
  --data '
{
  "message": "What are your business hours?",
  "sessionId": "sess_abc123"
}
'

{
  "response": "<string>",
  "sessionId": "<string>"
}