BuiltWith

BuiltWith Technology Discovery API

The Technology Discovery API from BuiltWith — 1 operation(s) for technology discovery.

Documentation GitHub OpenAPI

Operations 1

POST /agent/technology-search Search BuiltWith technologies by concept #

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this

find_apisBrowse and filter every API in the catalog.
get_api_artifactsOne API's artifacts, grouped by type.
get_openapiThe primary OpenAPI for this API.
find_similar_apisAPIs that look like this one.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This API

curl "https://apis.io/api/v1/apis/builtwith-technology-discovery-api"

All apis

curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.

OpenAPI Specification

openapi: 3.2.0
info:
  title: BuiltWith x402 Pay-per-Call Technology Discovery API
  version: 1.0.0
  description: Accountless pay-per-call website, company, and technology intelligence using x402 v2 and USDC on Base. AgentCash-compatible clients can discover and pay for every operation in this document.
  contact:
    name: BuiltWith Support
    email: support@builtwith.com
    url: https://builtwith.com/contact
  x-guidance: For one-off agent research, choose the narrowest /agent operation and use its documented HTTP method and input. Every /agent operation costs $0.0495; GET /agent/domain accepts query parameters and the other /agent calls accept JSON bodies. No account, API key, payer field, or prepaid key is needed. Send the intended input on the first request, read the x402 v2 challenge from PAYMENT-REQUIRED, sign it for Base USDC, and retry the identical request with PAYMENT-SIGNATURE. Validation and upstream failures are not settled. Use /agent/company-domains before /agent/domain when only a company name is known, /agent/technology-search to resolve a concept to BuiltWith technology names, and /agent/ask for natural-language website discovery. High-volume callers may instead buy prepaid credits through the BuiltWith MCP server. Fixed-price List passes are separate products for List API and committed Ask access.
servers:
- url: https://api.builtwith.com
tags:
- name: Technology Discovery
paths:
  /agent/technology-search:
    post:
      operationId: searchTechnologies
      summary: Search BuiltWith technologies by concept
      description: Run semantic search over BuiltWith technologies and categories to resolve a concept such as 'payment gateway' to relevant technology names.
      tags:
      - Technology Discovery
      security: []
      x-payment-info:
        price:
          mode: fixed
          currency: USD
          amount: '0.0495'
        protocols:
        - x402: {}
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              additionalProperties: false
              properties:
                query:
                  type: string
                  minLength: 1
                  maxLength: 500
                  description: Natural-language technology concept or product query.
                limit:
                  type: integer
                  minimum: 1
                  maximum: 100
                  default: 10
                  description: Maximum number of ranked matches.
              required:
              - query
            example:
              query: payment gateway
              limit: 10
      responses:
        '200':
          description: BuiltWith result returned after payment settlement
          headers:
            PAYMENT-RESPONSE:
              description: Base64-encoded x402 v2 settlement response.
              schema:
                type: string
          content:
            application/json:
              schema:
                type: object
                description: BuiltWith API JSON response. Fields vary by capability and available data.
                additionalProperties: true
        '400':
          description: Invalid JSON input; verified payments are not settled for validation failures
        '402':
          description: Payment Required
          headers:
            PAYMENT-REQUIRED:
              description: Base64-encoded x402 v2 payment requirements.
              schema:
                type: string
        '502':
          description: The upstream BuiltWith API request failed; the verified payment is not settled
        '503':
          description: x402 payments are not configured on this server
externalDocs:
  description: BuiltWith x402 USDC API documentation
  url: https://api.builtwith.com/x402-api
x-discovery:
  ownershipProofs:
  - '0x1ce9d8b85fd8afc523d26bf39eb4080326e4bef016e430f327d1cf6779fcdfdd0302f8e8804599bb3b7e254f26cf7fa3bc6c1311f9c9ae190e0c70e37fb305c11b'
x-x402-discovery: https://api.builtwith.com/.well-known/x402
x-agentcash-guidance:
  llmsTxtUrl: https://api.builtwith.com/llms.txt