When trying to change the URL with resty I get this error:
$ resty http://10.153.2.224:8000
resty:80: bad substitution
$ brew info resty
/usr/local/Cellar/resty/1.5 (4 files, 32K)
$ zsh --version
zsh 4.3.9 (i386-apple-darwin10.0)
Okay, that was a bug. It should now be fixed. Can you try v1.7, please? Thanks!