get_core_web_vitals

Analyze Core Web Vitals metrics for a website, including LCP, FID, and CLS, to assess performance and identify optimization opportunities. Specify URL, device type, and optional thresholds for detailed insights.

Instructions

Get Core Web Vitals metrics for a website

Input Schema

Name	Required	Description	Default
`device`	No	Device to emulate (default: desktop)	desktop
`includeDetails`	No	Include detailed metrics and recommendations
`threshold`	No
`url`	Yes	URL to audit

Input Schema (JSON Schema)

{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "additionalProperties": false,
  "properties": {
    "device": {
      "default": "desktop",
      "description": "Device to emulate (default: desktop)",
      "enum": [
        "desktop",
        "mobile"
      ],
      "type": "string"
    },
    "includeDetails": {
      "default": false,
      "description": "Include detailed metrics and recommendations",
      "type": "boolean"
    },
    "threshold": {
      "additionalProperties": false,
      "properties": {
        "cls": {
          "description": "Cumulative Layout Shift threshold",
          "minimum": 0,
          "type": "number"
        },
        "fid": {
          "description": "First Input Delay threshold in milliseconds",
          "minimum": 0,
          "type": "number"
        },
        "lcp": {
          "description": "Largest Contentful Paint threshold in seconds",
          "minimum": 0,
          "type": "number"
        }
      },
      "type": "object"
    },
    "url": {
      "description": "URL to audit",
      "type": "string"
    }
  },
  "required": [
    "url"
  ],
  "type": "object"
}

Lighthouse MCP

get_core_web_vitals

Instructions

Input Schema

Input Schema (JSON Schema)

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