Google PageSpeed Analysis API

openapi: 3.1.0
info:
  title: Google PageSpeed PageSpeed Insights Analysis API
  description: The PageSpeed Insights API runs Lighthouse audits on web pages and returns performance scores, Core Web Vitals metrics, Chrome User Experience Report field data, and detailed optimization opportunities and diagnostics.
  version: v5
  contact:
    name: Google Developers
    url: https://developers.google.com/speed
  termsOfService: https://cloud.google.com/terms
servers:
- url: https://www.googleapis.com/pagespeedonline/v5
  description: PageSpeed Insights API v5
security:
- apiKey: []
tags:
- name: Analysis
  description: Page performance analysis
paths:
  /runPagespeed:
    get:
      operationId: runPagespeed
      summary: Google PageSpeed Analyze page performance
      description: Runs PageSpeed analysis on the given URL. Returns Lighthouse audit results including performance score, Core Web Vitals, and optimization recommendations for both mobile and desktop strategies.
      tags:
      - Analysis
      parameters:
      - name: url
        in: query
        required: true
        description: The URL to analyze
        schema:
          type: string
          format: uri
      - name: strategy
        in: query
        description: The analysis strategy (desktop or mobile)
        schema:
          type: string
          enum:
          - DESKTOP
          - MOBILE
          default: MOBILE
      - name: category
        in: query
        description: Lighthouse categories to run
        schema:
          type: array
          items:
            type: string
            enum:
            - ACCESSIBILITY
            - BEST_PRACTICES
            - PERFORMANCE
            - SEO
        style: form
        explode: true
      - name: locale
        in: query
        description: The locale for results (e.g. en_US)
        schema:
          type: string
      - name: utm_campaign
        in: query
        description: Campaign name for analytics
        schema:
          type: string
      - name: utm_source
        in: query
        description: Campaign source for analytics
        schema:
          type: string
      - name: captchaToken
        in: query
        description: The captcha token for the request
        schema:
          type: string
      responses:
        '200':
          description: PageSpeed analysis results
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PagespeedResult'
        '400':
          description: Invalid URL or parameters
        '429':
          description: Rate limit exceeded
        '500':
          description: Internal error during analysis
components:
  schemas:
    LoadingExperience:
      type: object
      description: Chrome User Experience Report field data
      properties:
        id:
          type: string
        metrics:
          type: object
          properties:
            LARGEST_CONTENTFUL_PAINT_MS:
              $ref: '#/components/schemas/MetricDistribution'
            FIRST_INPUT_DELAY_MS:
              $ref: '#/components/schemas/MetricDistribution'
            CUMULATIVE_LAYOUT_SHIFT_SCORE:
              $ref: '#/components/schemas/MetricDistribution'
            INTERACTION_TO_NEXT_PAINT:
              $ref: '#/components/schemas/MetricDistribution'
            FIRST_CONTENTFUL_PAINT_MS:
              $ref: '#/components/schemas/MetricDistribution'
            EXPERIMENTAL_TIME_TO_FIRST_BYTE:
              $ref: '#/components/schemas/MetricDistribution'
        overall_category:
          type: string
          enum:
          - FAST
          - AVERAGE
          - SLOW
          - NONE
        initial_url:
          type: string
    Audit:
      type: object
      properties:
        id:
          type: string
        title:
          type: string
        description:
          type: string
        score:
          type: number
        scoreDisplayMode:
          type: string
          enum:
          - binary
          - numeric
          - informative
          - manual
          - notApplicable
          - error
        displayValue:
          type: string
        numericValue:
          type: number
        numericUnit:
          type: string
    MetricDistribution:
      type: object
      properties:
        percentile:
          type: integer
        distributions:
          type: array
          items:
            type: object
            properties:
              min:
                type: integer
              max:
                type: integer
              proportion:
                type: number
        category:
          type: string
          enum:
          - FAST
          - AVERAGE
          - SLOW
    PagespeedResult:
      type: object
      properties:
        captchaResult:
          type: string
        kind:
          type: string
          default: pagespeedonline#result
        id:
          type: string
          description: The URL that was analyzed
        loadingExperience:
          $ref: '#/components/schemas/LoadingExperience'
        originLoadingExperience:
          $ref: '#/components/schemas/LoadingExperience'
        lighthouseResult:
          $ref: '#/components/schemas/LighthouseResult'
        analysisUTCTimestamp:
          type: string
          format: date-time
    LighthouseResult:
      type: object
      properties:
        requestedUrl:
          type: string
        finalUrl:
          type: string
        lighthouseVersion:
          type: string
        fetchTime:
          type: string
          format: date-time
        userAgent:
          type: string
        environment:
          type: object
          properties:
            networkUserAgent:
              type: string
            hostUserAgent:
              type: string
            benchmarkIndex:
              type: number
        categories:
          type: object
          properties:
            performance:
              $ref: '#/components/schemas/Category'
            accessibility:
              $ref: '#/components/schemas/Category'
            best-practices:
              $ref: '#/components/schemas/Category'
            seo:
              $ref: '#/components/schemas/Category'
        audits:
          type: object
          additionalProperties:
            $ref: '#/components/schemas/Audit'
    Category:
      type: object
      properties:
        id:
          type: string
        title:
          type: string
        score:
          type: number
          minimum: 0
          maximum: 1
        description:
          type: string
        auditRefs:
          type: array
          items:
            type: object
            properties:
              id:
                type: string
              weight:
                type: number
              group:
                type: string
  securitySchemes:
    apiKey:
      type: apiKey
      name: key
      in: query
externalDocs:
  description: PageSpeed Insights API Reference
  url: https://developers.google.com/speed/docs/insights/v5/reference