Because of load balancers on our public gateways, sdk retries requests in case of 404. It does so by adding __sdk-retry parameter with an increased value on each request to ensure that the response won't be cached by anything in between.

I've noticed that adding __sdk-retry parameter to /accounts/<address>/activities actually breaks the response

{
  "error": "invalid query: {\"__sdk-retry\", \"2\"}"
}

While the retry approach is not useful regarding this endpoint, would be good to know the parameter that can be used for this purpose. As a solution, I propose to ignore parameters starting with an underscore in query validation.