I&#x27;m not sure I follow. The client would receive those errors because they are errors on the clients side; the client should ensure that they are not flooding a service other wise the server will cut them off.<p>Your simple middleware logic is going to have to examine the 400 error in more detail in order to adjust its request rate e.g. exponential back off.<p>It&#x27;s not that the &quot;server is over capacity&quot;, its that the specific client is making &quot;too many requests&quot;.