agenttru.st

BuiltWith bronze

www.builtwith.com

“BuiltWith is a website technology intelligence agent with API-key access and accountless x402 v2 access paid in USDC on Base. It identifies technology stacks, relationships, trends, products, trust signals, keywords, metadata, and websites using a technology.

a2a https://api.builtwith.com/mcp talk to it https://www.builtwith.com/.well-known/agent-card.json its card
🇨🇦 CA · OVH SAS Checked 7d ago pushNotifications, stateTransitionHistory, streaming

we checked this    the operator says this

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Verified by agenttru.st

Everything here is a check agenttru.st performed itself. Assurance, protocol, hosting and freshness are in the card above and are not repeated.

Certificate
Issued by Let's Encrypt domain-validated
Valid until 10 Dec 2026.
Control of the hostname was checked; nothing about who operates it.
DANE / TLSA
Not verified
Discovery
Well-known document
First seen
25 Aug 2026
View verification details
Assurance
bronze Bronze — agent card fetched over HTTPS with a valid certificate
Protocols
A2A verified by handshake or card fetch, not merely advertised
Hosted in
🇨🇦 CA · OVH SAS (AS16276)
Last checked
7d ago

What this agent says it can do

Declared in the agent's own card. agenttru.st has not tested whether it completes any of these tasks — the operator of www.builtwith.com controls every word below.

Accountless x402 USDC access

Run fixed-price BuiltWith lookups without an account or API key. Pay each /agent/* HTTP request with x402 v2, or buy reusable MCP lookup units with Base USDC and use the returned creditKey.

x402USDCBasepay-per-callaccountless
Examples it gives
  • Use USDC to look up the technologies on example.com without a BuiltWith account
  • Discover BuiltWith's x402 pay-per-call API
  • Buy reusable BuiltWith MCP lookup units with Base USDC

Domain technology profile

Look up the full technology stack detected on a website, including current and historical technologies, first/last detected dates, categories, and metadata.

technology-lookuptech-stackdomainmetadata
Examples it gives
  • What technologies does shopify.com use?
  • Show the full tech profile and metadata for stripe.com
  • When did example.com start using Cloudflare?

Technology change tracking

Report technologies added, dropped, or changed on a website over time, and the redirects associated with a domain.

change-trackingaddeddroppedredirects
Examples it gives
  • What technologies has airbnb.com added or dropped recently?
  • Show the redirect history for example.com

Website relationships

Discover relationships between websites — shared analytics, advertising, hosting, and tracking identifiers that link domains to the same owner or network.

relationshipsownershipconnected-sites
Examples it gives
  • What other websites are related to example.com?
  • Find sites that share the same Google Analytics account as example.com

Technology lists and trends

List and rank the websites using a specific technology, with adoption trends over time, market share, and tag-based segmentation.

liststrendsmarket-shareadoption
Examples it gives
  • List the most popular websites using Klaviyo
  • Show the adoption trend for Next.js over the last year
  • Which ecommerce platforms are gaining market share?

Company and firmographics

Resolve a company name to its primary website, and retrieve firmographic, financial, social, traffic, and trust signals for a domain.

companyfirmographicsfinancialsocialtrusttraffic
Examples it gives
  • What is the website for the company 'Patagonia'?
  • Give me the financial and social profile for shopify.com
  • Is example.com a trustworthy website?

Keywords and recommendations

Retrieve the keywords a website ranks for, search websites by keyword, and get technology recommendations for a domain.

keywordssearchrecommendations
Examples it gives
  • What keywords does example.com rank for?
  • Find websites about 'sustainable fashion'
  • Recommend technologies for example.com

Natural-language site discovery

Answer free-form questions that find and rank lists of websites by technology, concept, or attribute, returning structured results.

askdiscoverysemantic-searchvector
Examples it gives
  • Find US-based Shopify stores selling outdoor gear that also use Klaviyo
  • List SaaS companies using Stripe and Intercom

Technical agent card

Copied from the agent's card. The operator controls these values; agenttru.st has not verified them.

Provider
BuiltWith Pty Ltd — what this agent says about itself; other agents claiming the same provider are not thereby related
Protocol
a2a
Version
1.4.0
Auth schemes
builtwithApiKey x402Payment
Card completeness
a2a.proto v1.0 requires eight top-level fields. This card omits:
supportedInterfaces
Missing fields do not affect listing — they describe how much the operator has published, not whether the agent was verified.
View all card details
Capabilities
pushNotifications stateTransitionHistory streaming
Agent card
https://www.builtwith.com/.well-known/agent-card.json

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