BuiltWith

BuiltWith Domain Lookup API

Single or multi-domain technology detection endpoints

GitHub OpenAPI

Operations 3

GET /api.json Lookup domain technologies (JSON) #
GET /api.xml Lookup domain technologies (XML) #
GET /api.csv Lookup domain technologies (CSV) #

Specifications

⚙
OpenAPI
https://raw.githubusercontent.com/api-evangelist/builtwith/refs/heads/main/openapi/builtwith-domain-lookup-api-openapi.yml

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OpenAPI Specification

builtwith-domain-lookup-api-openapi.yml Raw ↑ 
openapi: 3.2.0
info:
  title: BuiltWith Domain Domain Lookup API
  description: Current and historical website technology information for single or multiple domains. Supports JSON, XML, and CSV response formats. Provides technology stack detection, metadata, attributes, and bulk processing capabilities across 491.9 million domains and 115,907 tracked web technologies.
  version: v22
  contact:
    name: BuiltWith Support
    url: https://builtwith.com/contact
  termsOfService: https://builtwith.com/terms
  license:
    name: Commercial
    url: https://builtwith.com/plans
servers:
- url: https://api.builtwith.com/v22
  description: BuiltWith Domain API v22
security:
- apiKeyQuery: []
- apiKeyHeader: []
tags:
- name: Domain Lookup
  description: Single or multi-domain technology detection endpoints
paths:
  /api.json:
    get:
      summary: Lookup domain technologies (JSON)
      description: Returns the technology stack and metadata for one or more domains in JSON format. Supports up to 16 domains as a comma-separated list.
      operationId: getDomainTechnologiesJson
      tags:
      - Domain Lookup
      parameters:
      - $ref: '#/components/parameters/KEY'
      - $ref: '#/components/parameters/LOOKUP'
      - $ref: '#/components/parameters/HIDETEXT'
      - $ref: '#/components/parameters/NOMETA'
      - $ref: '#/components/parameters/NOPII'
      - $ref: '#/components/parameters/LIVEONLY'
      - $ref: '#/components/parameters/TRUST'
      - $ref: '#/components/parameters/FDRANGE'
      - $ref: '#/components/parameters/NOATTR'
      - $ref: '#/components/parameters/CATEGORIES'
      - $ref: '#/components/parameters/VERTICALS'
      responses:
        '200':
          description: Technology profile for the requested domain(s)
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DomainResult'
              example:
                Results:
                - Result:
                    Lookup: example.com
                    Meta:
                      CompanyName: Example Inc
                      Vertical: Business and Consumer Services
                    Paths:
                    - Technologies:
                      - Name: WordPress
                        Tag: cms
                        Categories:
                        - Category: CMS
                        FirstDetected: 1609459200000
                        LastDetected: 1748736000000
                        Live: true
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '429':
          $ref: '#/components/responses/RateLimited'
  /api.xml:
    get:
      summary: Lookup domain technologies (XML)
      description: Returns domain technology profile in XML format.
      operationId: getDomainTechnologiesXml
      tags:
      - Domain Lookup
      parameters:
      - $ref: '#/components/parameters/KEY'
      - $ref: '#/components/parameters/LOOKUP'
      - $ref: '#/components/parameters/HIDETEXT'
      - $ref: '#/components/parameters/NOMETA'
      - $ref: '#/components/parameters/NOPII'
      - $ref: '#/components/parameters/LIVEONLY'
      - $ref: '#/components/parameters/TRUST'
      - $ref: '#/components/parameters/FDRANGE'
      - $ref: '#/components/parameters/NOATTR'
      responses:
        '200':
          description: Technology profile in XML format
          content:
            application/xml:
              schema:
                type: object
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /api.csv:
    get:
      summary: Lookup domain technologies (CSV)
      description: Returns domain technology profile in CSV format.
      operationId: getDomainTechnologiesCsv
      tags:
      - Domain Lookup
      parameters:
      - $ref: '#/components/parameters/KEY'
      - $ref: '#/components/parameters/LOOKUP'
      - $ref: '#/components/parameters/HIDETEXT'
      - $ref: '#/components/parameters/NOMETA'
      - $ref: '#/components/parameters/NOPII'
      - $ref: '#/components/parameters/LIVEONLY'
      responses:
        '200':
          description: Technology profile in CSV format
          content:
            text/csv:
              schema:
                type: string
components:
  schemas:
    DomainResult:
      type: object
      description: Top-level response wrapper for domain technology lookups
      properties:
        Results:
          type: array
          items:
            $ref: '#/components/schemas/DomainResultItem'
    Technology:
      type: object
      description: A detected web technology
      properties:
        Name:
          type: string
          example: WordPress
        Description:
          type: string
        Link:
          type: string
          format: uri
        Tag:
          type: string
          description: Primary technology category tag
          example: cms
        Categories:
          type: array
          items:
            $ref: '#/components/schemas/TechCategory'
        FirstDetected:
          type: integer
          format: int64
          description: Unix timestamp (ms) of first detection
        LastDetected:
          type: integer
          format: int64
          description: Unix timestamp (ms) of last detection
        Live:
          type: boolean
          description: Whether the technology is currently active
        Attributes:
          type: array
          items:
            $ref: '#/components/schemas/Attribute'
    Attribute:
      type: object
      description: Additional attribute data for a technology
      properties:
        Field:
          type: string
        Value:
          type: string
    DomainResultItem:
      type: object
      properties:
        Result:
          $ref: '#/components/schemas/Result'
    DomainMeta:
      type: object
      description: Company and domain metadata
      properties:
        CompanyName:
          type: string
        Vertical:
          type: string
        Telephones:
          type: array
          items:
            type: string
        Emails:
          type: array
          items:
            type: string
        City:
          type: string
        State:
          type: string
        Postcode:
          type: string
        Country:
          type: string
        Names:
          type: array
          items:
            type: string
    Result:
      type: object
      properties:
        Lookup:
          type: string
          description: The queried domain
          example: example.com
        Meta:
          $ref: '#/components/schemas/DomainMeta'
        Paths:
          type: array
          items:
            $ref: '#/components/schemas/Path'
    Path:
      type: object
      properties:
        Domain:
          type: string
          description: Sub-domain or path scanned
        Technologies:
          type: array
          items:
            $ref: '#/components/schemas/Technology'
    TechCategory:
      type: object
      properties:
        Category:
          type: string
          example: CMS
    ErrorResponse:
      type: object
      properties:
        Errors:
          type: array
          items:
            type: object
            properties:
              Code:
                type: integer
              Message:
                type: string
  parameters:
    TRUST:
      name: TRUST
      in: query
      description: Set to 'yes' to include trust/safety data (uses additional API credits)
      required: false
      schema:
        type: string
        enum:
        - 'yes'
    KEY:
      name: KEY
      in: query
      description: Your BuiltWith API authentication key (UUID format)
      required: false
      schema:
        type: string
        format: uuid
        example: 00000000-0000-0000-0000-000000000000
    NOATTR:
      name: NOATTR
      in: query
      description: Set to 'yes' to exclude technology attributes
      required: false
      schema:
        type: string
        enum:
        - 'yes'
    LOOKUP:
      name: LOOKUP
      in: query
      description: 'Domain or comma-separated list of up to 16 domains to look up. Use root domains only.

        '
      required: true
      schema:
        type: string
        example: example.com
    FDRANGE:
      name: FDRANGE
      in: query
      description: Filter by detection date range in YYYY-MM-DD|YYYY-MM-DD format
      required: false
      schema:
        type: string
        example: 2025-01-01|2026-01-01
    LIVEONLY:
      name: LIVEONLY
      in: query
      description: Set to 'yes' to return only currently active technologies
      required: false
      schema:
        type: string
        enum:
        - 'yes'
    CATEGORIES:
      name: CATEGORIES
      in: query
      description: Set to '1' to return technology category list instead of domain data
      required: false
      schema:
        type: integer
        enum:
        - 1
    VERTICALS:
      name: VERTICALS
      in: query
      description: Set to '1' to return vertical list instead of domain data
      required: false
      schema:
        type: integer
        enum:
        - 1
    NOPII:
      name: NOPII
      in: query
      description: Set to 'yes' to remove personally identifiable information (names/emails)
      required: false
      schema:
        type: string
        enum:
        - 'yes'
    HIDETEXT:
      name: HIDETEXT
      in: query
      description: Set to 'yes' to exclude technology descriptions and links
      required: false
      schema:
        type: string
        enum:
        - 'yes'
    NOMETA:
      name: NOMETA
      in: query
      description: Set to 'yes' to skip address and company metadata
      required: false
      schema:
        type: string
        enum:
        - 'yes'
  responses:
    Unauthorized:
      description: Unauthorized — invalid or missing API key
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    RateLimited:
      description: 'Too many requests — max 10 req/sec or 8 concurrent requests exceeded

        '
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    BadRequest:
      description: Bad request — invalid parameters
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
  securitySchemes:
    apiKeyQuery:
      type: apiKey
      in: query
      name: KEY
      description: API key passed as a query parameter
    apiKeyHeader:
      type: apiKey
      in: header
      name: Authorization
      description: 'API key in header format: ''Authorization: API {key}'''
externalDocs:
  description: BuiltWith Domain API Documentation
  url: https://api.builtwith.com/domain-api