Google Groups Settings API failing with System Errors - google-apps-script

Question

Having had repeatedly no joy with accessing groups settings via UrlFetch in GoogleAppsScript I looked to test the basic query I was using according to the docs in the APIs Explorer
UrlFetchApp.fetch('https://www.googleapis.com/groups/v1/groups/exampleGroupId#example.com?key={YOUR_API_KEY}', fetchArgs);
Never completes a round tring
The fact that the APIs explorer also fails with similar errors at least gives me some comfort, but where to report the failing?
GET https://www.googleapis.com/groups/v1/groups/exampleGroupId#example.com?key={YOUR_API_KEY}
Authorization: Bearer ya29....[snip]
X-JavaScript-User-Agent: Google APIs Explorer
gives
200 OK
cache-control: private, max-age=0, must-revalidate, no-transform
content-encoding: gzip
content-length: 731
content-type: application/atom+xml; charset=UTF-8
date: Tue, 12 Nov 2013 11:31:09 GMT
etag: "N…[snip]…I"
expires: Tue, 12 Nov 2013 11:31:09 GMT
server: GSE
[application/atom+xml; charset=UTF-8 data]
adding any field to the query
GET https://www.googleapis.com/groups/v1/groups/exampleGroupId#example.com?fields=archiveOnly&key={YOUR_API_KEY}
Authorization: Bearer ya29....[snip]
X-JavaScript-User-Agent: Google APIs Explorer
always results in error
400 Bad Request
cache-control: private, max-age=0
content-encoding: gzip
content-length: 209
content-type: application/vnd.google.gdata.error+xml; charset=UTF-8
date: Tue, 12 Nov 2013 11:33:34 GMT
expires: Tue, 12 Nov 2013 11:33:34 GMT
server: GSE
[application/vnd.google.gdata.error+xml; charset=UTF-8 data]
<?xml version="1.0" encoding="UTF-8"?>
<errors xmlns="http://schemas.google.com/g/2005">
<error>
<domain>GData</domain>
<code>invalidParameter</code>
<location type="parameter">fields</location>
<internalReason>Invalid field selection archiveOnly</internalReason>
</error>
</errors>
Is the API borked?

Answer 1

Try using the Google OAuth 2.0 Playground instead. I think the Groups Settings API Explorer is broken.
I am also having trouble with implementing with in Apps Script. I am stuck in an authorization loop. Similar to this reported bug. https://code.google.com/p/google-apps-script-issues/issues/detail?id=3046