# ParaViewWeb : simple server has built in primitive ?
**URL:** https://discourse.paraview.org/t/paraviewweb-simple-server-has-built-in-primitive/6866
**Category:** Web Support
**Created:** [April 4, 2021, 10:28pm UTC](https://discourse.paraview.org/t/paraviewweb-simple-server-has-built-in-primitive/6866 "2021-04-04T22:28:04Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@Nicholas\_Yue](https://discourse.paraview.org/u/Nicholas_Yue)
#### Post date: [April 4, 2021, 10:28pm UTC](https://discourse.paraview.org/t/paraviewweb-simple-server-has-built-in-primitive/6866/1 "2021-04-04T22:28:04Z")
Hi,
I am just getting started learning ParaViewWeb and tried the following command
```auto
./bin/pvpython ./share/paraview-5.9/web/visualizer/server/pvw-visualizer.py --content ./share/paraview-5.9/web/visualizer/www/ --data $PWD/share/paraview-5.9/data --port 8080
```
When I connect to it from a web browser, I can see that it has some primitives like Cone
I looked at the pvw-visualizer.py but did not see Cone so I am wondering if those are built in primitive for quick troubleshooting purposes ?
Cheers
---
### Author:  [@jourdain](https://discourse.paraview.org/u/jourdain)
#### Post date: [April 5, 2021, 3:25pm UTC](https://discourse.paraview.org/t/paraviewweb-simple-server-has-built-in-primitive/6866/2 "2021-04-05T15:25:41Z")
Those come from a list of available proxies. Right now we have a subset of what ParaView has, but this can be extended to match exactly what is available in ParaView or even come up with more. You will just need to provide a custom [proxies.json](https://github.com/Kitware/visualizer/blob/master/server/proxies.json) file and provide it as argument when you run it. You can see all the args by running with `--help` or looking at [that section](https://github.com/Kitware/visualizer/blob/master/server/pvw-visualizer.py#L2-L78) in the code.
HTH,
Seb