curl --request POST \
  --url http://localhost:3000/api/agent/sendChatMsg \
  --header 'Content-Type: application/json' \
  --header 'x-access-token: <api-key>' \
  --data '
{
  "message": "<string>",
  "sessionId": "<string>"
}
'

{
  "success": true,
  "messageId": "<string>"
}