--- title: List core web vital metrics trend --- [Skip to content](#_top) [API Reference](https://developers.cloudflare.com/api/go) [Speed](https://developers.cloudflare.com/api/go/resources/speed) [Pages](https://developers.cloudflare.com/api/go/resources/speed/subresources/pages) Copy Markdown Open in **Claude**Open in **ChatGPT**Open in **Cursor** --- **Copy Markdown****View as Markdown** # List core web vital metrics trend client.Speed.Pages.Trend(ctx, url, params) (\*[Trend](), error) GET/zones/{zone\_id}/speed\_api/pages/{url}/trend Lists the core web vital metrics trend over time for a specific page. ##### Security
API Token The preferred authorization scheme for interacting with the Cloudflare API. Create a token. **Example:**Authorization: Bearer Sn3lZJTBX6kkg7OdcBUAxOO963GEIyGQqnFTOFYY
API Email + API Key The previous authorization scheme for interacting with the Cloudflare API, used in conjunction with a Global API key. **Example:**X-Auth-Email: user@example.com The previous authorization scheme for interacting with the Cloudflare API. When possible, use API tokens instead of Global API keys. **Example:**X-Auth-Key: 144c9defac04969c7bfad8efaa8ea194
##### Accepted Permissions (at least one required) `Zone Settings Write``Zone Settings Read` ##### ParametersExpand Collapse url string A URL. [Link to this property](<#(resource)%20speed.pages%20%3E%20(method)%20trend%20%3E%20(params)%20default%20%3E%20(param)%20url%20%3E%20(schema)>)
params PageTrendParams ZoneID param.Field\[string] Path param: Identifier. maxLength32 Link to this property
DeviceType param.Field\[PageTrendParamsDeviceType] Query param: The type of device. const PageTrendParamsDeviceTypeDesktop PageTrendParamsDeviceType = "DESKTOP" Link to this property const PageTrendParamsDeviceTypeMobile PageTrendParamsDeviceType = "MOBILE" Link to this property
Link to this property Metrics param.Field\[string] Query param: A comma-separated list of metrics to include in the results. Link to this property
Region param.Field\[PageTrendParamsRegion] Query param: A test region. const PageTrendParamsRegionAsiaEast1 PageTrendParamsRegion = "asia-east1" Link to this property const PageTrendParamsRegionAsiaNortheast1 PageTrendParamsRegion = "asia-northeast1" Link to this property const PageTrendParamsRegionAsiaNortheast2 PageTrendParamsRegion = "asia-northeast2" Link to this property const PageTrendParamsRegionAsiaSouth1 PageTrendParamsRegion = "asia-south1" Link to this property const PageTrendParamsRegionAsiaSoutheast1 PageTrendParamsRegion = "asia-southeast1" Link to this property const PageTrendParamsRegionAustraliaSoutheast1 PageTrendParamsRegion = "australia-southeast1" Link to this property const PageTrendParamsRegionEuropeNorth1 PageTrendParamsRegion = "europe-north1" Link to this property const PageTrendParamsRegionEuropeSouthwest1 PageTrendParamsRegion = "europe-southwest1" Link to this property const PageTrendParamsRegionEuropeWest1 PageTrendParamsRegion = "europe-west1" Link to this property const PageTrendParamsRegionEuropeWest2 PageTrendParamsRegion = "europe-west2" Link to this property const PageTrendParamsRegionEuropeWest3 PageTrendParamsRegion = "europe-west3" Link to this property const PageTrendParamsRegionEuropeWest4 PageTrendParamsRegion = "europe-west4" Link to this property const PageTrendParamsRegionEuropeWest8 PageTrendParamsRegion = "europe-west8" Link to this property const PageTrendParamsRegionEuropeWest9 PageTrendParamsRegion = "europe-west9" Link to this property const PageTrendParamsRegionMeWest1 PageTrendParamsRegion = "me-west1" Link to this property const PageTrendParamsRegionSouthamericaEast1 PageTrendParamsRegion = "southamerica-east1" Link to this property const PageTrendParamsRegionUsCentral1 PageTrendParamsRegion = "us-central1" Link to this property const PageTrendParamsRegionUsEast1 PageTrendParamsRegion = "us-east1" Link to this property const PageTrendParamsRegionUsEast4 PageTrendParamsRegion = "us-east4" Link to this property const PageTrendParamsRegionUsSouth1 PageTrendParamsRegion = "us-south1" Link to this property const PageTrendParamsRegionUsWest1 PageTrendParamsRegion = "us-west1" Link to this property
Link to this property Start param.Field\[Time] Query param formatdate-time Link to this property Tz param.Field\[string] Query param: The timezone of the start and end timestamps. Link to this property End param.Field\[Time]Optional Query param formatdate-time Link to this property
[Link to this property](<#(resource)%20speed.pages%20%3E%20(method)%20trend%20%3E%20(params)%20default>) ##### ReturnsExpand Collapse
type Trend struct{…} CLS \[]float64Optional Cumulative Layout Shift trend. Link to this property FCP \[]float64Optional First Contentful Paint trend. Link to this property LCP \[]float64Optional Largest Contentful Paint trend. Link to this property PerformanceScore \[]float64Optional The Lighthouse score trend. Link to this property Si \[]float64Optional Speed Index trend. Link to this property TBT \[]float64Optional Total Blocking Time trend. Link to this property TTFB \[]float64Optional Time To First Byte trend. Link to this property TTI \[]float64Optional Time To Interactive trend. Link to this property
[Link to this property](<#(resource)%20speed%20%3E%20(model)%20trend%20%3E%20(schema)>) ### List core web vital metrics trend Go HTTPTypeScriptPythonGoTerraform ``` package main import ( "context" "fmt" "time" "github.com/cloudflare/cloudflare-go" "github.com/cloudflare/cloudflare-go/option" "github.com/cloudflare/cloudflare-go/speed" ) func main() { client := cloudflare.NewClient( option.WithAPIToken("Sn3lZJTBX6kkg7OdcBUAxOO963GEIyGQqnFTOFYY"), ) trend, err := client.Speed.Pages.Trend( context.TODO(), "example.com", speed.PageTrendParams{ ZoneID: cloudflare.F("023e105f4ecef8ad9ca31a8372d0c353"), DeviceType: cloudflare.F(speed.PageTrendParamsDeviceTypeDesktop), Metrics: cloudflare.F("performanceScore,ttfb,fcp,si,lcp,tti,tbt,cls"), Region: cloudflare.F(speed.PageTrendParamsRegionUsCentral1), Start: cloudflare.F(time.Now()), Tz: cloudflare.F("tz"), }, ) if err != nil { panic(err.Error()) } fmt.Printf("%+v\n", trend.CLS) } ``` 200 example ``` { "errors": [ { "code": 1000, "message": "message", "documentation_url": "documentation_url", "source": { "pointer": "pointer" } } ], "messages": [ { "code": 1000, "message": "message", "documentation_url": "documentation_url", "source": { "pointer": "pointer" } } ], "success": true, "result": { "cls": [ 0 ], "fcp": [ 0 ], "lcp": [ 0 ], "performanceScore": [ 0 ], "si": [ 0 ], "tbt": [ 0 ], "ttfb": [ 0 ], "tti": [ 0 ] } } ``` ##### Returns Examples 200 example ``` { "errors": [ { "code": 1000, "message": "message", "documentation_url": "documentation_url", "source": { "pointer": "pointer" } } ], "messages": [ { "code": 1000, "message": "message", "documentation_url": "documentation_url", "source": { "pointer": "pointer" } } ], "success": true, "result": { "cls": [ 0 ], "fcp": [ 0 ], "lcp": [ 0 ], "performanceScore": [ 0 ], "si": [ 0 ], "tbt": [ 0 ], "ttfb": [ 0 ], "tti": [ 0 ] } } ```