200 is a successful HTTP status code not an error code so no alarm should be generated.
This class of status codes indicates the action requested by the client was received, understood and accepted.
200 OK
Standard response for successful HTTP requests. The actual response will depend on the request method used. In a GET request, the response will contain an entity corresponding to the requested resource. In a POST request, the response will contain an entity describing or containing the result of the action
http://www.iana.org/assignments/http-status-codes/http-status-codes.xhtml
The url_response alarm message as currently defined:
<Failed>
text = URL response for '$profile' failed. $code $description
level = major
subsystem = 1.1.14
token = failed
variables = profile code description
i18n_token = as#network.url_response.failed
</Failed>
implies a failure/error.
In my opinion, no alarm should be generated for the 200 response. Despite the potential workaround, a support case should be opened, if not done so already, so an RFI can be entered/reported to Development. The probe is currently working as designed so perhaps an enhancement request (Idea) should be entered.
Steve