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

# Deactivate a License Key

Deactivate a specific machine instance for a given license key. This frees up an activation slot, allowing the customer to activate the license on a new device.

This endpoint is **Client-Safe**. You do not need to provide your `blnk_live_` secret key. You can call this directly from a desktop application (like Electron, Tauri, or Swift) by simply providing the `license_key` and the `instance_id`.

<RequestExample>
  ```bash cURL theme={null}
  curl --request POST \
    --url https://api.blink.store/v1/license-keys/deactivate \
    --header 'Content-Type: application/json' \
    --data '{
      "license_key": "YOUR_LICENSE_KEY_STRING",
      "instance_id": "INSTANCE_UUID"
    }'
  ```

  ```javascript JavaScript theme={null}
  fetch("https://api.blink.store/v1/license-keys/deactivate", {
    method: "POST",
    headers: {
      "Content-Type": "application/json"
    },
    body: JSON.stringify({
      "license_key": "YOUR_LICENSE_KEY_STRING",
      "instance_id": "INSTANCE_UUID"
    })
  })
  .then(response => response.json())
  .then(data => console.log(data));
  ```
</RequestExample>