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

# Nov 13, 2024

> Use key qualifier signals as filters when creating or updating draft projects.

<a href="/docs/Changelog/overview" className="changelog-back">← Back to Product Updates</a>

<Update label="Nov 13, 2024">
  **Key qualifiers: use signals as filters in the Public API**

  Key qualifiers is a feature that allows researchers to use signal type audience parameters as filters.

  The following fields can be used with Key qualifiers only if they are given values in the project:

  * Topics
  * Industries
  * Company size
  * Seniority
  * Skills
  * Household income

  Can be added or updated during project create and update of draft projects.

  * [Create project reference](https://developers.respondent.io/reference/projectscontroller_create)
  * [Update project reference](https://developers.respondent.io/reference/projectscontroller_update)

  Key qualifiers can be found in the lookups: `v1/lookups?pick=keyQualifier`.
</Update>