The first one, that Gustaf said, works pretty well with fixed namespaces values or when you know the namespace or any pattern to match the procs names. I solved one problem here.
When the only info I've got is the file's name&path (the tcl library) that contains all the procs and I don't know the namespace and regexp pattern, I had to use Bryan's solution which is using the api-doc browser code doing a:
% nsv_get api_proc_doc_scripts packages/foo_pkg/tcl/foo_lib.tcl
Thanks guys! =)