Couchbase workbench

Can a read-only user of couchbase server access query workbench?

The read-only user cannot use the query workbench is Couchbase 4.5. For that release, the best option is the forthcoming stand-alone query workbench DP 1.0.4 (the current version is 1.0.2, but it is not compatible with 4.5). It should be on the website soon.