generated: '2026-08-14'
method: searched
source: >-
  https://builtwith.com/.well-known/mcp.json (resources[]),
  live tools/list on https://api.builtwith.com/mcp (_meta.ui.resourceUri),
  https://builtwith.com/toolbar, https://builtwith.com/crm-integrations
description: >-
  BuiltWith ships no JavaScript element library or embeddable web components for developers.
  What it does ship on the client side are MCP UI widgets rendered inside an agent client, and
  end-user browser extensions. Both are recorded here; neither is an SDK (see packages/).
families:
- name: MCP UI widgets
  kind: agent-client embedded UI
  loader: MCP resources over https://api.builtwith.com/mcp
  description: >-
    Interactive HTML surfaces the hosted MCP server returns alongside tool results. Tools carry
    an _meta.ui.resourceUri pointing at the widget an MCP client should render.
  components:
  - name: Domain Technologies Table
    uri: 'ui://widget/domain-technologies.html'
    description: Interactive table for BuiltWith domain technology results.
    bound_tools: [domain-lookup, x402-domain-lookup]
  - name: Ask API Sites Table
    uri: 'ui://widget/ask-sites.html'
    description: Interactive table for BuiltWith Ask API website list results.
    bound_tools: [ask-api, x402-ask-api]
- name: Browser extensions
  kind: end-user client
  loader: browser extension stores
  description: >-
    The BuiltWith toolbar surfaces a site's technology profile in the browser. Distributed
    through extension stores rather than a package registry.
  components:
  - name: BuiltWith Technology Profiler toolbar
    url: https://builtwith.com/toolbar
not_found:
- web-components / custom elements
- hosted embeddable dashboards or iframe widgets for developers
- prebuilt checkout or auth surfaces