BuiltWith

io.github.builtwith/builtwith · v2.1.0

Official BuiltWith tools for website technologies, company research, relationships, and trends.

Website Source code Set it up

Connect Remote server

Terminal

claude mcp add --transport http builtwith https://api.builtwith.com/mcp --header "Authorization: Bearer <YOUR_API_KEY>"

~/.cursor/mcp.json

{
  "mcpServers": {
    "builtwith": {
      "url": "https://api.builtwith.com/mcp",
      "headers": {
        "Authorization": "Bearer <YOUR_API_KEY>"
      }
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "builtwith": {
      "type": "http",
      "url": "https://api.builtwith.com/mcp",
      "headers": {
        "Authorization": "Bearer <YOUR_API_KEY>"
      }
    }
  }
}

Claude Desktop

Settings > Connectors > Add custom connector
URL: https://api.builtwith.com/mcp

Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.

Tools 51 found in our last check

mpp-catalog
Discover Stripe card MPP payments without an existing BuiltWith account or API key. The smallest purchase is $0.50 for 10 API lookups. Guest access tokens default to 24 hours; request up to 720 hours before paying. Lists require a plan.
mpp-purchase
Buy API lookup credits or a one-off plan with Stripe MPP card payment. No BuiltWith API key required. Start without paymentCredential to get a 402 challenge; use an MPP-compatible Stripe wallet to authorize it, then retry the IDENTICAL purchase with paymentCredential. Keep the r…
mpp-data
Use the temporary access_token returned by mpp-purchase without configuring an API key. Domain and change lookups spend one purchased API credit per domain. Lists require a purchased basic/pro/team plan, not lookup credits. Reuse the token for further calls until expiry or credi…
domain-lookup
Returns the live web technologies used on the root domain name.
domain-api
Domain API JSON lookup for technology and metadata by domain.
domain-api-json
Raw Domain API JSON lookup for technology and metadata by domain.
change-api
Change API JSON lookup for technology additions and removals by domain. Supports one or more comma-separated domains and optional natural language SINCE values such as 'last month'.
relationships-api
Relationships API JSON lookup for related websites by domain.
free-api
Free API JSON lookup for category/group counts by domain.
company-to-url
Company to URL API JSON lookup for domains from a company name.
tags-api
Tags API JSON lookup for related domains from IP or attributes.
recommendations-api
Recommendations API JSON lookup for technology recommendations by domain.
redirects-api
Redirects API JSON lookup for live and historical redirects by domain.
keywords-api
Keywords API JSON lookup for keyword data by domain.
keywords-search-api
Keyword Search API — find websites containing a specific keyword. Returns a list of matching domains and a NextOffset value for pagination. Costs API credits per query.
trends-api
Trends API JSON lookup for technology trend data.
product-api
Product API JSON lookup for ecommerce product searches.
trust-api
Trust API JSON lookup for trust scoring by domain.
vat-api
VAT API JSON lookup for VAT, GST, CNPJ, ABN, and other publicly displayed company registration numbers associated with websites. Accepts 1–16 comma-separated domains. Uses 1 API credit only for each domain that returns registration data; domains with no results use no credits. R…
vat-types-api
List every company registration type that the VAT API may return, including its code, friendly name, and description. This public endpoint requires no API key and uses no API credits.
whoami-api
WhoAmI API JSON lookup for account limits, credit costs, privacy flags, max batch sizes, and endpoint inventory. Uses no API credits. Call this first to make account-aware decisions.
usage-api
Usage API JSON lookup for current credit balance (used, purchased, remaining). Uses no API credits.
mcp-list-api
Search and browse remote MCP servers in the BuiltWith MCP registry (v2). Requires a BuiltWith API key supplied as a bearer token. Provide search, category, or both. Returns up to 100 results per page as a JSON array of {Domain, Category, Description, Endpoints: [{Endpoint, AuthR…
mcp-list-categories
List valid BuiltWith MCP registry category slugs, labels, and entry counts (v2). This public endpoint requires no API key and uses no API credits.
list-api
List API JSON lookup for websites using a primary technology. Requires an active BuiltWith plan. OTHERTECHS are subordinate filters and do not consume additional primary technology report slots.
payment-balance
Check an existing account's API-credit balance through the saved-Stripe-method top-up service. This is not x402.
payment-config
Retrieve saved-Stripe-method account top-up limits, UTC monthly period, purchase increment, and idempotency rules. This is not x402.
payment-purchase
Charge an existing account's saved Stripe payment method and add account API credits. This is not x402. Requires the separately scoped Agent Billing Key, fixed 2,000-credit increments, and an idempotency key.
vector-api
Search BuiltWith technologies and categories by text query using vector similarity. Returns ranked results with similarity scores (0–1), descriptions, and category info. Useful for discovering what technologies match a concept or description (e.g. 'react framework', 'payment gat…
ask-api
Ask API lookup for natural language website list queries. OpenAI requests are served as preview results and do not commit full reports.
ask-api-json
Raw Ask API JSON lookup for app/internal use. OpenAI requests never send COMMIT=true.
x402-pricing
Show prepaid batch-credit pricing, x402 configuration, and List pass tiers. Optionally quote a credit quantity. Uses no payment.
x402-credit-purchase
Purchase a batch of at least 2,000 non-expiring BuiltWith API credits with one x402 payment. Returns a reusable secret credit key; provide an existing key to top it up.
x402-credit-balance
Check purchased, used, pending, and available credits for a reusable prepaid key. Uses no payment and consumes no credits.
x402-domain-lookup
Returns live web technologies for one domain using one prepaid credit.
x402-domain-api
Domain API technology and metadata lookup for one domain using one prepaid credit.
x402-domain-api-json
Raw Domain API JSON lookup for one or more comma-separated domains. Deducts prepaid credits from a reusable key.
x402-change-api
Technology additions and removals for one or more comma-separated domains. Deducts prepaid credits from a reusable key.
x402-relationships-api
Related websites for a domain. Deducts prepaid credits from a reusable key.
x402-company-to-url
Domains associated with a company name. Deducts prepaid credits from a reusable key.
x402-tags-api
Related domains from an IP address or attributes. Deducts prepaid credits from a reusable key.
x402-recommendations-api
Technology recommendations for a domain. Deducts prepaid credits from a reusable key.
x402-redirects-api
Live and historical redirects for a domain. Deducts prepaid credits from a reusable key.
x402-keywords-api
Keyword data for a domain. Deducts prepaid credits from a reusable key.
x402-trust-api
Trust score for a domain. Deducts prepaid credits from a reusable key.
x402-vat-api
Public company registration identifiers for one to sixteen domains. Deducts prepaid credits from a reusable key.
x402-vector-api
Vector similarity search across BuiltWith technologies and categories. Deducts prepaid credits from a reusable key.
x402-list-pass-purchase
Purchase a 30-day Basic ($295, 2 technology and 2 keyword reports) or Pro ($495, 50 and 50) List API pass with Base USDC.
x402-list-api
List websites using a primary technology with a valid x402 List pass. OTHERTECHS are subordinate filters and never consume additional technology report slots.
x402-keywords-search-api
Search websites containing a keyword with a valid x402 List pass.
x402-ask-api
Natural-language website query using one prepaid credit. Committed reports and pagination also require a Basic or Pro List pass.

Headers

Name	Description
`Authorization` Optional, secret	Optional for accountless tools. For account tools, enter Bearer followed by your BuiltWith API key.

Details

Endpoint	`https://api.builtwith.com/mcp` (Streamable HTTP)
First published	10 Nov 2026
Last updated	10 Nov 2026
Registry name	`io.github.builtwith/builtwith`

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Live status

Live

Typical response: 622 ms
Answered: 100% of 2 checks
Last check: 13 Nov 2026

30 days agoToday

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