Oh man, we had a connection with an API recently where if you sent it some incorrect data it would just hang. No errors, no closing of the connection. Just hang

Oh man, we had a connection with an API recently where if you sent it some incorrect data it would just hang. No errors, no closing of the connection. Just hang. And ofc they don't offer a heartbeat over that channel. That would still be fine... if the data was static. But it's not - and changes are communicated; but not to the relevant tech teams.