CrUX
Get CrUX timeline
Gets the daily timeline of Chrome UX Report (CrUX) values for the page, if available. All values are the 75th percentile. No other value is available in the CrUX report.
GET /{website-id}/pages/{page-id}/crux?device={device}
The device and date range are set using these querystring parameters:
| Querystring parameter | Description |
|---|---|
| date | The date range in yyyyMMdd-yyyyMMdd format. Defaults to last 90 days. Example: 20230401-20230501 |
| device | Mandatory. Either desktop or mobile |
The result looks like this:
{
"result": [
{
"date": "2023-03-31",
"count": 1,
"lcp": 1472,
"fcp": 1320,
"fid": null,
"cls": 0,
"ttfb": 637,
"inp": null,
"passed": 1
},
{
"date": "2023-04-01",
"count": 1,
"lcp": 1435,
"fcp": 1329,
"fid": null,
"cls": 0,
"ttfb": 637,
"inp": null,
"passed": 1
},
...The properties for each array item are:
| Property | Data type | Description |
|---|---|---|
| date | yyyyMMdd | The date that the metrics are averaged over |
| lcp | integer | Largest Contentful Paint (ms) |
| fid | integer | First Input Delay (ms) |
| cls | integer | Cumulative Layout Shift (unitless) |
| fcp | integer | First Contentful Paint (ms) |
| ttfb | integer | Time To First Byte (ms) |
| inp | integer | Interaction To Next Paint (ms) |
| passed | integer | 1 if Core Web Vitals passed, otherwise 0 |
Note that some of the metrics can be null or missing - commonly the interactivity metrics (fid and inp).