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

# Usage API

export const LwTemplate = ({title = "Key questions to get you started", icon = "sparkles", cta = "Powered by Agent Studio", linkHref = "https://lucidworks.com/demo/?utm_source=docs&utm_medium=referral&utm_campaign=docs_cta_ai"}) => {
  const [isLoaded, setIsLoaded] = useState(false);
  useEffect(() => {
    const timer = setTimeout(() => {
      setIsLoaded(true);
    }, 500);
    return () => clearTimeout(timer);
  }, []);
  return <div className="lw-template-container">
      <Card title={title} icon={icon}>
        {isLoaded && <span dangerouslySetInnerHTML={{
    __html: `<lw-template id="a029c1a9-28be-427e-b0e1-5d918920246a"></lw-template
            >`
  }} />}
        <Link href={linkHref} className="agent-studio-link text-left text-gray-600 gap-2 dark:text-gray-400 text-sm font-medium flex flex-row items-center hover:text-primary dark:hover:text-primary-light group-hover:text-primary group-hover:dark:text-primary-light">Powered by Lucidworks Agent Studio</Link>
      </Card>
    </div>;
};

[localhost link]: http://localhost:3000/docs/4/fusion-server/reference/api/system-admin-apis/usage-api

[mintlify link]: https://doc.lucidworks.com/docs/4/fusion-server/reference/api/system-admin-apis/usage-api

[old doc.lw link]: https://doc.lucidworks.com/fusion-server/4.2/346

The Usage API sends system usage data to Lucidworks. See [System Usage Monitor](/docs/4/fusion-server/concepts/system/system-usage-monitor) for details.

<Tip>
  **Important**

  The Usage API is removed in Fusion 5.x.
</Tip>

<LwTemplate />

## Examples

*Get the latest data that will be sent to Lucidworks on the next run:*

**INPUT**

```bash wrap  theme={"dark"}
curl -u USERNAME:PASSWORD https://FUSION_HOST:8764/api/usage
```

**OUTPUT**

```json wrap  expandable  theme={"dark"}
[ {
  "type" : "GAUGE",
  "name" : "solr.clusters",
  "value" : 3
}, {
  "type" : "GAUGE",
  "name" : "solr.nodes",
  "value" : 2
}, {
  "type" : "RATE",
  "name" : "recommender.itemsForQuery.timer.rate",
  "value" : 0
}, {
  "type" : "RATE",
  "name" : "recommender.queriesForItem.timer.rate",
  "value" : 0
}, {
  "type" : "GAUGE",
  "name" : "nodes",
  "value" : 2
}, {
  "type" : "RATE",
  "name" : "recommender.queriesForItem.counter.rate",
  "value" : 0
}, {
  "type" : "RATE",
  "name" : "recommender.itemsForItem.timer.rate",
  "value" : 0
}, {
  "type" : "RATE",
  "name" : "recommender.itemsForQuery.counter.rate",
  "value" : 0
}, {
  "type" : "RATE",
  "name" : "recommender.itemsForItem.counter.rate",
  "value" : 0
} ]
```