Redmine

I suggest adding "check status" feature to Redmine REST API so I could verify:
1) the host name is valid and there's Redmine with REST API enabled at that location
2) the API access key is valid
Response from the server can include some info about the Redmine installation (e.g. Redmine version, some server health check/status, maybe the user name for the given Access Key, ...)

I tried getting list of projects to achieve goals 1 and 2, but the problem is that in some cases this request can timeout, e.g. this is what happens with demo.redmine.org site with plenty of projects (thousands?):

java.io.IOException: Server returned HTTP response code: 502 for URL: http://demo.redmine.org/projects.xml

My guess is that projects list is too long and demo.redmine.org server is too slow. Retrieving list of projects can potentially be a long-running operation, while "check status" can be completed in O(1) time.