> ## Documentation Index
> Fetch the complete documentation index at: https://docs.virtuous.org/llms.txt
> Use this file to discover all available pages before exploring further.

# Get Query Parameter Values

> Returns the values available for a single query parameter.

Pass the `queryType` and the `parameter` you are filling in, and narrow the values with an optional `filter`.

<Info>Use it to populate a picker for parameters whose values come from your own data, such as campaigns or projects.</Info>

<Note>The spec does not document error responses for this endpoint beyond `401`, so the causes aren't listed with the responses here. Errors still arrive in the [ProblemDetails envelope](/raise/error-handling#the-problemdetails-envelope) the rest of the Raise API uses — handle a rejected request (`400`), and a path ID that doesn't resolve (`404`), as you would on any other endpoint.</Note>


## API Specification

The full API specification for this endpoint is available in the [documentation index](https://docs.virtuous.org/llms.txt).