Request count sum for last 1 hour

I have a use case where I want to set the alerts from grafana on hourly basis. In this hourly alert I want to get the request count for each API in last 1 hour and collect them and sent along with the alert. I tried different combination of using

1. sum - sum(increase(http_server_requests_seconds_count[1h]))
2. increase - increase(http_server_requests_seconds_count[1h])
3. sum_over_time - sum_over_time(http_server_requests_seconds_count[1h])
4. count_over_time - count_over_time(http_server_requests_seconds_count[1h])

While I am validating the result from request count it is not adding up. Any suggestions? Thanks in advance.