> For the complete documentation index, see [llms.txt](https://help.novacuraflow.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.novacuraflow.com/connectors/areas/communication/rest-service/rest-project-tool/operations/parameters/computed-parameters.md).

# Computed parameters

The value of computed parameters are defined using c#-code. It is still sent as it's *kind*, if it is a query parameter, it is sent as a query parameter. But the value is calculated in code and the parameter will no longer appear as an input parameter in a machine step using the corresponding operation. The return value is always a string (represented by the variable 'returnValue', see examples below).

The c# code runs in a sandbox with no access to file system, network and is limited to use the same assemblies as a [model transform](/connectors/areas/communication/rest-service/rest-project-tool/model-transform.md).  

All non-computed parameters that isn't constants of the operation are available, as well as the output of required operations and any configuration parameters. 

![](/files/-MA1byo8q3bwvIeG5_O3)


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