> ## Documentation Index
> Fetch the complete documentation index at: https://technologychecker.io/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Get domain tech history API

> Get the full technology history for a domain, including removed technologies with active/removed status and dates. Track technology adoption and removal over time.

## Frequently asked questions

<AccordionGroup>
  <Accordion title="What's the difference between this endpoint and the basic domain lookup?">
    The basic lookup (`GET /v1/domain/{domain}`) splits technologies into separate `active` and `historical` arrays. This history endpoint returns a single unified list with a `status` field (`active` or `removed`) for each technology, which makes it easier to track changes over time.
  </Accordion>

  <Accordion title="How far back does domain technology history go?">
    History depth varies by domain. TechnologyChecker's crawl data goes back up to 20 years for well-established domains. The `first_seen` and `last_seen` dates show exactly when each technology was first detected and when it was last confirmed or removed.
  </Accordion>

  <Accordion title="How can I use this endpoint to track technology changes?">
    Poll this endpoint periodically (e.g., weekly or monthly) and compare the `status` field across responses. Technologies that change from `active` to `removed` mean the domain dropped that tool. New entries with `active` status show recent adoptions. This is useful for competitive intelligence and churn detection.
  </Accordion>
</AccordionGroup>


## OpenAPI

````yaml GET /v1/domain/{domain}/history
openapi: 3.1.0
info:
  title: TechnologyChecker API
  description: >-
    Discover technology stacks, track market trends, and enrich data with
    company intelligence.
  version: 1.0.0
  contact:
    name: TechnologyChecker Support
    email: support@technologychecker.io
    url: https://technologychecker.io
servers:
  - url: https://api.technologychecker.io
    description: Production
security:
  - bearerAuth: []
tags:
  - name: Domain technologies
    description: Look up technologies detected on any domain
  - name: Technology data
    description: Search, look up, and get details on tracked technologies
  - name: Market intelligence
    description: Technology stats, trends, and market share
  - name: Company data
    description: Firmographic and company intelligence
  - name: Live detection
    description: Real-time technology detection with browser rendering
paths:
  /v1/domain/{domain}/history:
    get:
      tags:
        - Domain technologies
      summary: Get domain tech history API
      description: >-
        Get the full technology history for a domain, including removed
        technologies with status and dates. Useful for tracking technology
        adoption and removal over time.
      operationId: getDomainTechHistory
      parameters:
        - name: domain
          in: path
          required: true
          description: The domain to look up (e.g., `stripe.com`)
          schema:
            type: string
            example: stripe.com
      responses:
        '200':
          description: Technology history for the domain
          content:
            application/json:
              schema:
                type: object
                properties:
                  success:
                    type: boolean
                    example: true
                  data:
                    type: object
                    properties:
                      domain:
                        type: string
                        example: stripe.com
                      technologies:
                        type: array
                        items:
                          type: object
                          properties:
                            id:
                              type: integer
                              example: 2
                            name:
                              type: string
                              example: Cloudflare
                            category:
                              type: string
                              example: CDN
                            status:
                              type: string
                              enum:
                                - active
                                - removed
                              example: active
                            first_seen:
                              type: string
                              example: '2020-05-08 00:00:00'
                            last_seen:
                              type: string
                              example: '2026-01-08 00:00:00'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
        '429':
          $ref: '#/components/responses/RateLimited'
components:
  responses:
    Unauthorized:
      description: Missing or invalid API key
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ApiError'
    NotFound:
      description: Resource not found
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ApiError'
    RateLimited:
      description: Rate limit exceeded
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ApiError'
  schemas:
    ApiError:
      type: object
      properties:
        success:
          type: boolean
          example: false
        error:
          type: object
          properties:
            code:
              type: string
              example: UNAUTHORIZED
            message:
              type: string
              example: Missing or invalid API key
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: >-
        API key in format `tapi_live_[32-char]` (live) or `tapi_test_[32-char]`
        (test)

````