Hi Viv, I downloaded the android-json-rpc and tried this

 try
        {
            String SERVER = "http://10.10.1.11:9000/jsonrpc.js";
            JSONRPCClient jc = new JSONRPCHttpClient(SERVER);
            jc.setConnectionTimeout(10000);
            jc.setSoTimeout(10000);
            JSONArray jaArtists = jc.callJSONArray("slim.request", new String[]{"artists","0","1"});
        }
        catch (Exception ex)
        {
            ex.printStackTrace();
        }

But It fails with not very helpful "IO Error" on the call to callJSONArray ?