It will be nice to add additional parameter for web related Agent checks - http_proxy/https_proxy.

For now we have at leas 4 web related Agent checks:

web.page.get
web.page.perf
web.page.regexp
web.certificate.get

Unfortunately external sites are not always accessible from monitoring hosts.

Additional parameter in key for proxy server would be a really simple way to achieve it (and when the macro is not defined or empty, then direct monitoring would be used).

For https proxy and web.certificate.get method connect should be supported.