# How to load and render a vtk file via visualizer API
**URL:** https://discourse.paraview.org/t/how-to-load-and-render-a-vtk-file-via-visualizer-api/15699
**Category:** Web Support
**Created:** [November 7, 2024, 11:36pm UTC](https://discourse.paraview.org/t/how-to-load-and-render-a-vtk-file-via-visualizer-api/15699 "2024-11-07T23:36:33Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@roka2024](https://discourse.paraview.org/u/roka2024)
#### Post date: [November 7, 2024, 11:36pm UTC](https://discourse.paraview.org/t/how-to-load-and-render-a-vtk-file-via-visualizer-api/15699/1 "2024-11-07T23:36:33Z")
Hi All,
I want to use the REST API of visualizer to load and render a certain vtk file in the data directory it’s connected to.
The following code returns 200 but there’s nothing happening in visualizer. Can you help?
mheaders = {
“Content-Type”: “application/json”
}
def load\_file\_into\_pv():
url = “visURL”
payload = {
“method”: “openFile”,
“args”: {
“file”: “/tmp/pv/file.vtk”
}
}
```
response = requests.get(url, json=payload, headers=mheaders)
if response.status_code == 200:
print("File loaded successfully!")
else:
print("Failed to load file:", response.text)
```
def render\_display():
render\_url = “visURL”
payload = {“method”: “render”}
response = requests.get(render\_url, json=payload, headers=mheaders)
if response.status\_code == 200:
print(“Render triggered successfully!”)
else:
print(“Failed to trigger render:”, response.text)
---
### Author:  [@jourdain](https://discourse.paraview.org/u/jourdain)
#### Post date: [November 8, 2024, 1:08am UTC](https://discourse.paraview.org/t/how-to-load-and-render-a-vtk-file-via-visualizer-api/15699/2 "2024-11-08T01:08:36Z")
Visualizer don’t have a REST API.
---
### Author:  [@roka2024](https://discourse.paraview.org/u/roka2024)
#### Post date: [November 8, 2024, 1:12am UTC](https://discourse.paraview.org/t/how-to-load-and-render-a-vtk-file-via-visualizer-api/15699/3 "2024-11-08T01:12:40Z")
Is there another way that would achieve that?
i.e. load and render a file, and set certain options like color map as default?
---
### Author:  [@jourdain](https://discourse.paraview.org/u/jourdain)
#### Post date: [November 8, 2024, 1:18am UTC](https://discourse.paraview.org/t/how-to-load-and-render-a-vtk-file-via-visualizer-api/15699/4 "2024-11-08T01:18:30Z")
Command line arguments when you start visualizer. Or change the client code to process some URL and make RPC call to the server.
---
### Author:  [@jourdain](https://discourse.paraview.org/u/jourdain)
#### Post date: [November 8, 2024, 1:20am UTC](https://discourse.paraview.org/t/how-to-load-and-render-a-vtk-file-via-visualizer-api/15699/5 "2024-11-08T01:20:37Z")
Or change the server code to create a REST endpoint.