# Protocol Handlers
Protocol handlers allow you to trigger scripts when custom protocols are executed. Protocols can be executed locally and also from webpages as links.
## Define a Protocol Handle
You can define protocol handlers in the `protocolHandlers.ps1` file using the `New-PSUProtocolHandler` cmdlet. You will need to define the protocol name and script to execute.
```powershell
New-PSUProtocolHandler -Script test.ps1 -Protocol psu
```
To execute the protocol handler, you could include the following HTML tag in a web page.
```powershell
Click Me
```
## Accessing URI Data
When a script is executed, you will receive the `$ProtocolUri` parameter. It will include the full URI that was invoked. For example, a script could take the URI and show a page.
```powershell
param($ProtocolUri)
$Page = $ProtocolUri.Replace("psu://", "")
$Page
Show-PSUPage -Url $Page
```
---
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