Plugin not showing as available

I have developed a plugin and uploaded it. It exists at
http://plugins.svn.ww.wp.xz.cn/simple-minmax/
This plugin dose not appear when its searched for and nothing shows up for versions when i go to
https://api.ww.wp.xz.cn/stats/plugin/1.0/simple-minmax

Can anybody identify what is wrong or point me to a tool(s) to verify all is good with the plugin directory structure etc.

Thank you in advance