> ## 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.

# Search technologies for lead lists API

> Search technologies by name and get live domain counts, so you can size a filter before building a list. Free.

## Frequently asked questions

<AccordionGroup>
  <Accordion title="What is this for?">
    Powering the technology picker on a list builder. It returns each technology's live domain count alongside its name, so a user can see that a filter matches 4.9 million domains before committing to it.
  </Accordion>

  <Accordion title="Is it free?">
    Yes. Everything on the way to a lead list — technology search, the technology map and the count preview — is free. You only pay when rows are delivered.
  </Accordion>

  <Accordion title="Why does the count differ from what my list produces?">
    This is the raw count of domains running the technology. A list applies your other filters too — country, industry, size, contact data — each of which narrows it further. Use [preview count](/docs/api-reference/lead-lists/preview-count-api) for an estimate of the full filter set.
  </Accordion>
</AccordionGroup>


## OpenAPI

````yaml GET /v1/leads/technologies/search
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
  - name: Signals
    description: >-
      Intent signals derived from technology state transitions: who adopted, who
      churned, who switched, and who has a gap in their stack.
  - name: Alerts
    description: >-
      Saved signal queries delivered to your webhook. Every signal you can
      query, you can subscribe to.
  - name: Audiences
    description: >-
      Saved groups of domains — uploaded lists or computed recipes — that you
      can profile, slice and monitor.
  - name: Lead lists
    description: >-
      Build and export targeted domain lists combining technology detection with
      company data.
paths:
  /v1/leads/technologies/search:
    get:
      tags:
        - Lead lists
      summary: Search technologies for lead lists API
      description: >-
        Search technologies by name and get their live domain counts, so you can
        size a filter before you build a list. Free.
      operationId: searchLeadTechnologies
      parameters:
        - name: q
          in: query
          required: true
          description: Search query, minimum 2 characters.
          schema:
            type: string
            minLength: 2
            example: cloudflare
        - name: limit
          in: query
          required: false
          description: Maximum results. Capped at 50.
          schema:
            type: integer
            default: 20
            maximum: 50
      responses:
        '200':
          description: Matching technologies with domain counts
          content:
            application/json:
              schema:
                type: object
                properties:
                  success:
                    type: boolean
                    example: true
                  data:
                    type: object
                    properties:
                      technologies:
                        type: array
                        items:
                          type: object
                          properties:
                            id:
                              type: integer
                              example: 2
                            name:
                              type: string
                              example: Cloudflare
                            category:
                              type: string
                              example: CDN
                            icon_url:
                              type: string
                            domain_count:
                              type: integer
                              example: 4954630
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '429':
          $ref: '#/components/responses/RateLimited'
components:
  responses:
    BadRequest:
      description: Invalid or missing parameters
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ApiError'
          example:
            success: false
            error:
              code: VALIDATION_ERROR
              message: >-
                Provide exactly one scope: technology_id, technology or
                category_id.
    Unauthorized:
      description: Missing or invalid API key
      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)

````