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

# Add Files To Block List

Adds files which do not exist in the allow or block lists to a block list.

<Note>
  External Documentation

  To learn more, visit the [Cortex XDR documentation](https://docs-cortex.paloaltonetworks.com/r/Cortex-XDR-Platform-APIs/Block-List-Files).
</Note>

## Parameters

<div className="integrations-table">
  | Parameter        | Description                                                                                                                                                          |
  | ---------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
  | Comment          | Additional information regarding the action.                                                                                                                         |
  | File Hashes List | A comma-separated list of file hashes which will be added to a block list.                                                                                           |
  | Incident ID      | String representing the incident ID.<br /><br />When included in the request, the Isolate Endpoints action will appear in the Cortex XDR Incident View Timeline tab. |
</div>

## Example Output

```json theme={"dark"}
true
```

## Workflow Library Example

[Add Files to Block List with Cortex Xdr and Send Results Via Email](https://library.blinkops.com/workflows/add-files-to-block-list-with-cortex-xdr-and-send-results-via-email)

<div className="iframe-wrapper">
  <div className="iframe-media">
    <img src="https://mintcdn.com/blinkops-2/ojHYuDeYX5FWuN8a/img/Icons/play-box.svg?fit=max&auto=format&n=ojHYuDeYX5FWuN8a&q=85&s=b8af968e71438a9499c3223c9bd29fb2" alt="Workflow Library" width="16" height="16" data-path="img/Icons/play-box.svg" />

    Preview this Workflow on desktop
  </div>

  <iframe className="iframe" src="https://library.blinkops.com/workflows/add-files-to-block-list-with-cortex-xdr-and-send-results-via-email/canvas" />
</div>