PageSpeed Insights API

openapi: 3.1.0
info:
  title: Google PageSpeed PageSpeed Insights 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
externalDocs:
  description: PageSpeed Insights API Reference
  url: https://developers.google.com/speed/docs/insights/v5/reference
servers:
  - url: https://www.googleapis.com/pagespeedonline/v5
    description: PageSpeed Insights API v5
tags:
  - name: Analysis
    description: Page performance analysis
security:
  - apiKey: []
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:
  securitySchemes:
    apiKey:
      type: apiKey
      name: key
      in: query
  schemas:
    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
    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
    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]
    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
    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