--- title: List core web vital metrics trend --- [Skip to content](#_top) [API Reference](https://developers.cloudflare.com/api) [Speed](https://developers.cloudflare.com/api/resources/speed) [Pages](https://developers.cloudflare.com/api/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 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` ##### P ath ParametersExpand Collapse zone\_id: string Identifier. maxLength32 [Link to this property](<#(resource)%20speed.pages%20%3E%20(method)%20trend%20%3E%20(params)%20default%20%3E%20(param)%20zone_id%20%3E%20(schema)>) 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)>) ##### Q uery ParametersExpand Collapse

deviceType: "DESKTOP"or "MOBILE" The type of device.

One of the following: "DESKTOP" Link to this property "MOBILE" Link to this property

[Link to this property](<#(resource)%20speed.pages%20%3E%20(method)%20trend%20%3E%20(params)%20default%20%3E%20(param)%20deviceType%20%3E%20(schema)>) metrics: string A comma-separated list of metrics to include in the results. [Link to this property](<#(resource)%20speed.pages%20%3E%20(method)%20trend%20%3E%20(params)%20default%20%3E%20(param)%20metrics%20%3E%20(schema)>)

region: "asia-east1"or "asia-northeast1"or "asia-northeast2"or 18 more A test region.

[Link to this property](<#(resource)%20speed.pages%20%3E%20(method)%20trend%20%3E%20(params)%20default%20%3E%20(param)%20region%20%3E%20(schema)>) start: string formatdate-time [Link to this property](<#(resource)%20speed.pages%20%3E%20(method)%20trend%20%3E%20(params)%20default%20%3E%20(param)%20start%20%3E%20(schema)>) tz: string The timezone of the start and end timestamps. [Link to this property](<#(resource)%20speed.pages%20%3E%20(method)%20trend%20%3E%20(params)%20default%20%3E%20(param)%20tz%20%3E%20(schema)>) end: optional string formatdate-time [Link to this property](<#(resource)%20speed.pages%20%3E%20(method)%20trend%20%3E%20(params)%20default%20%3E%20(param)%20end%20%3E%20(schema)>) ##### ReturnsExpand Collapse

errors: array of ResponseInfo { code, message, documentation\_url, source }

code: number minimum1000 Link to this property message: string Link to this property documentation\_url: optional string Link to this property

source: optional object {pointer }

pointer: optional string Link to this property

Link to this property

[Link to this property](<#(resource)%20speed.pages%20%3E%20(method)%20trend%20%3E%20(network%20schema)%20%3E%20(property)%20errors>)

messages: array of ResponseInfo { code, message, documentation\_url, source }

code: number minimum1000 Link to this property message: string Link to this property documentation\_url: optional string Link to this property

source: optional object {pointer }

pointer: optional string Link to this property

Link to this property

[Link to this property](<#(resource)%20speed.pages%20%3E%20(method)%20trend%20%3E%20(network%20schema)%20%3E%20(property)%20messages>) success: boolean Whether the API call was successful. [Link to this property](<#(resource)%20speed.pages%20%3E%20(method)%20trend%20%3E%20(network%20schema)%20%3E%20(property)%20success>)

result: optional Trend { cls, fcp, lcp, 5 more }

cls: optional array of number Cumulative Layout Shift trend. Link to this property fcp: optional array of number First Contentful Paint trend. Link to this property lcp: optional array of number Largest Contentful Paint trend. Link to this property performanceScore: optional array of number The Lighthouse score trend. Link to this property si: optional array of number Speed Index trend. Link to this property tbt: optional array of number Total Blocking Time trend. Link to this property ttfb: optional array of number Time To First Byte trend. Link to this property tti: optional array of number Time To Interactive trend. Link to this property

[Link to this property](<#(resource)%20speed.pages%20%3E%20(method)%20trend%20%3E%20(network%20schema)%20%3E%20(property)%20result>) ### List core web vital metrics trend HTTP HTTPTypeScriptPythonGoTerraform ``` curl https://api.cloudflare.com/client/v4/zones/$ZONE_ID/speed_api/pages/$URL/trend \ -H "Authorization: Bearer $CLOUDFLARE_API_TOKEN" ``` 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 ] } } ```