Ok ... after some feedback from Erik I saw that I am using 2 Libs (rest is plain old JSE):
- jettison (Under Apache 2.0 license)
- jersey (CDDL 1.1 and GPL 2 with CPE)
I am using both in order to query the Rest interface of mavencentral for searching of allready available versions of libs in the compilers libs.
I could possibly us an Apache compatable Rest client (Googling showed me that there's an Apache project: http://en.wikipedia.org/wiki/Apache_Wink)