openapi: 3.0.3
info:
  title: Serper Google Search Autocomplete Patents API
  description: RESTful API providing real-time Google Search Engine Results Page (SERP) data in structured JSON format. Supports web search, image search, news, maps, places, videos, shopping, scholar, patents, and autocomplete via POST endpoints. Authentication uses an X-API-KEY header. Designed for high-throughput AI and LLM applications with up to 300 queries per second.
  version: 1.0.0
  contact:
    name: Serper Support
    url: https://serper.dev
  termsOfService: https://serper.dev/terms-of-service
  license:
    name: Commercial
    url: https://serper.dev
servers:
- url: https://google.serper.dev
  description: Serper API server
security:
- apiKeyHeader: []
tags:
- name: Patents
  description: Patent search results
paths:
  /patents:
    post:
      operationId: patentsSearch
      summary: Patents Search
      description: Perform a Google Patents search returning patent records with titles, snippets, priority dates, filing dates, grant dates, inventors, assignees, publication numbers, and figure images.
      tags:
      - Patents
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/SearchRequest'
            example:
              q: machine learning neural network
              gl: us
              hl: en
      responses:
        '200':
          description: Successful patents search response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PatentsSearchResponse'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '429':
          $ref: '#/components/responses/TooManyRequests'
components:
  schemas:
    SearchParameters:
      type: object
      properties:
        q:
          type: string
          description: The search query.
        gl:
          type: string
          description: Country code.
        hl:
          type: string
          description: Language code.
        type:
          type: string
          description: The type of search performed.
        num:
          type: integer
          description: Number of results requested.
        page:
          type: integer
          description: Page number.
    SearchRequest:
      type: object
      required:
      - q
      properties:
        q:
          type: string
          description: The search query string.
          example: google search
        gl:
          type: string
          description: Country code for geolocation of results (ISO 3166-1 alpha-2).
          example: us
          default: us
        hl:
          type: string
          description: Language code for results (ISO 639-1).
          example: en
          default: en
        num:
          type: integer
          description: Number of results to return (1-100).
          minimum: 1
          maximum: 100
          default: 10
          example: 10
        page:
          type: integer
          description: Page number for pagination.
          minimum: 1
          default: 1
          example: 1
        tbs:
          type: string
          description: Time-based search filter. Use values like 'qdr:h' (past hour), 'qdr:d' (past day), 'qdr:w' (past week), 'qdr:m' (past month), 'qdr:y' (past year).
          example: qdr:d
        autocorrect:
          type: boolean
          description: Whether to enable autocorrect for the query.
          default: true
    PatentsSearchResponse:
      type: object
      properties:
        searchParameters:
          $ref: '#/components/schemas/SearchParameters'
        organic:
          type: array
          description: Patent search results.
          items:
            $ref: '#/components/schemas/PatentResult'
    PatentFigure:
      type: object
      properties:
        imageUrl:
          type: string
          format: uri
          description: URL to the full-size patent figure image.
        thumbnailUrl:
          type: string
          format: uri
          description: URL to the thumbnail patent figure image.
    ErrorResponse:
      type: object
      properties:
        message:
          type: string
          description: Human-readable error description.
    PatentResult:
      type: object
      properties:
        title:
          type: string
          description: Patent title.
        snippet:
          type: string
          description: Abstract or description excerpt.
        link:
          type: string
          format: uri
          description: URL to the patent on Google Patents.
        priorityDate:
          type: string
          format: date
          description: Priority date of the patent (YYYY-MM-DD).
        filingDate:
          type: string
          format: date
          description: Filing date of the patent (YYYY-MM-DD).
        grantDate:
          type: string
          format: date
          description: Grant date of the patent (YYYY-MM-DD).
        publicationDate:
          type: string
          format: date
          description: Publication date of the patent (YYYY-MM-DD).
        inventor:
          type: string
          description: Inventor name(s).
        assignee:
          type: string
          description: Patent assignee (usually a company).
        publicationNumber:
          type: string
          description: Patent publication number (e.g., "US10678858B2").
        language:
          type: string
          description: Language of the patent document.
        thumbnailUrl:
          type: string
          format: uri
          description: Thumbnail URL of the patent diagram.
        pdfUrl:
          type: string
          format: uri
          description: URL to the patent PDF.
        figures:
          type: array
          items:
            $ref: '#/components/schemas/PatentFigure'
          description: Patent figures and diagrams.
        position:
          type: integer
          description: Position in patent results.
  responses:
    Unauthorized:
      description: Unauthorized — invalid or missing API key.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    BadRequest:
      description: Bad request — missing or invalid parameters.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    TooManyRequests:
      description: Too many requests — rate limit exceeded or credits exhausted.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
  securitySchemes:
    apiKeyHeader:
      type: apiKey
      in: header
      name: X-API-KEY
      description: API key obtained from https://serper.dev/api-key