# Asynch Paraview Proxies - how do I find what's supported?

**URL:** https://discourse.paraview.org/t/asynch-paraview-proxies-how-do-i-find-whats-supported/14908
**Category:** ParaView Support
**Created:** [June 21, 2024, 11:25pm UTC](https://discourse.paraview.org/t/asynch-paraview-proxies-how-do-i-find-whats-supported/14908 "2024-06-21T23:25:22Z")
**Posts on this page:** 2
**Page:** 1

<div class="post-metadata">

### Author: ![Douglas\_Brennan](https://discourse.paraview.org/user_avatar/discourse.paraview.org/douglas_brennan/32/11955_2.png) [@Douglas\_Brennan](https://discourse.paraview.org/u/Douglas_Brennan)
#### Post date: [June 21, 2024, 11:25pm UTC](https://discourse.paraview.org/t/asynch-paraview-proxies-how-do-i-find-whats-supported/14908/1 "2024-06-21T23:25:22Z")

</div>

Hello!!!

This is a question about Asynch Paraview. If there’s a better place to ask this questoin, let me know…  
I’m building a POC with Trame and Asynch Paraview and I’m at the point where I need to do more than I can figure out from the two example apps (wavelet, rock)

In general, there doesn’t seem to be any documentation for any of the asynch microservices - like PipelineBuilder etc. Is this correct, or am I missing something?

My most immediate need to is to find out what filters are supported. In the snippet below I’m trying to use the Shrink filter, but this bombs with the below error

`RuntimeError: Could not create proxy`Shrink`of group`filters`

How do I find out what filters are supported and the properties that they support? And is there any documentation available that I’m missing?

```auto
        self.outline = await self._builder.CreateProxy(
            "filters", 
            "Shrink", 
            Input=self.reader
        )

```

---

<div class="post-metadata">

### Author: ![jourdain](https://discourse.paraview.org/user_avatar/discourse.paraview.org/jourdain/32/11_2.png) [@jourdain](https://discourse.paraview.org/u/jourdain)
#### Post date: [June 23, 2024, 4:45pm UTC](https://discourse.paraview.org/t/asynch-paraview-proxies-how-do-i-find-whats-supported/14908/2 "2024-06-23T16:45:01Z")

</div>

That shrink filter should be there since it is defined [here](https://gitlab.kitware.com/async/async-paraview/-/blob/master/Remoting/Application/Resources/filters_filtersgeneral.xml?ref_type=heads#L1353).  
In the `Remoting/Application/Resources/*.xml`, you should be able to find all the available proxies.

I’m not sure why you are getting that runtime error.