Tech Detect
Domain in, technology stack out. Every hit carries a confidence value and the evidence it rests on. Paid inside the request over x402, no signup, no API key, no dashboard.
Endpoint
| Route | Price | What it does |
|---|---|---|
POST /stack |
0.005 USDC | Identify the technology stack of one website: CMS, shop, framework, JavaScript libraries with version, analytics, consent tool, payment provider, CDN, web server, host, font source, chat and booking widget. |
POST /stack/monitor |
0.009 USDC | Scan up to three public websites and compare observed technologies and versions against caller-owned previous snapshots, returning evidence and reusable baselines. |
POST /stack/articles/wordpress |
0.005 USDC | Monitor observed WordPress fingerprints and versions on one website. |
POST /stack/articles/shopify |
0.005 USDC | Monitor observed Shopify fingerprints and versions on one website. |
POST /stack/articles/nextjs |
0.005 USDC | Monitor observed Next.js fingerprints and versions on one website. |
POST /stack/articles/php |
0.005 USDC | Monitor observed PHP fingerprints and versions on one website. |
POST /stack/articles/jquery |
0.005 USDC | Monitor observed jQuery fingerprints and versions on one website. |
POST /stack/articles/elementor |
0.005 USDC | Monitor observed Elementor fingerprints and versions on one website. |
POST /stack/articles/ga4 |
0.005 USDC | Monitor observed Google Analytics 4 fingerprints and versions on one website. |
POST /stack/articles/gtm |
0.005 USDC | Monitor observed Google Tag Manager fingerprints and versions on one website. |
POST /stack/articles/cookiebot |
0.005 USDC | Monitor observed Cookiebot fingerprints and versions on one website. |
POST /stack/articles/stripe |
0.005 USDC | Monitor observed Stripe fingerprints and versions on one website. |
POST /stack/articles/cloudflare |
0.005 USDC | Monitor observed Cloudflare fingerprints and versions on one website. |
POST /stack/articles/nginx |
0.005 USDC | Monitor observed nginx fingerprints and versions on one website. |
POST /stack/articles/vercel |
0.005 USDC | Monitor observed Vercel fingerprints and versions on one website. |
POST /stack/articles/google-fonts |
0.005 USDC | Monitor observed Google Fonts fingerprints and versions on one website. |
POST /stack/articles/intercom |
0.005 USDC | Monitor observed Intercom fingerprints and versions on one website. |
POST /stack/articles/calendly |
0.005 USDC | Monitor observed Calendly fingerprints and versions on one website. |
POST /stack/articles/hubspot |
0.005 USDC | Monitor observed HubSpot fingerprints and versions on one website. |
POST /stack/articles/sentry |
0.005 USDC | Monitor observed Sentry fingerprints and versions on one website. |
POST /stack/articles/recaptcha |
0.005 USDC | Monitor observed Google reCAPTCHA fingerprints and versions on one website. |
POST /stack/articles/yoast |
0.005 USDC | Monitor observed Yoast SEO fingerprints and versions on one website. |
POST /stack/articles/algolia |
0.005 USDC | Monitor observed Algolia fingerprints and versions on one website. |
POST /stack/articles/youtube-embed |
0.005 USDC | Monitor observed YouTube embed fingerprints and versions on one website. |
POST /stack/articles/typo3 |
0.005 USDC | Monitor observed TYPO3 fingerprints and versions on one website. |
POST /stack/articles/woocommerce |
0.005 USDC | Monitor observed WooCommerce fingerprints and versions on one website. |
POST /stack/articles/nuxt |
0.005 USDC | Monitor observed Nuxt fingerprints and versions on one website. |
POST /stack/articles/python |
0.005 USDC | Monitor observed Python fingerprints and versions on one website. |
POST /stack/articles/jquery-ui |
0.005 USDC | Monitor observed jQuery UI fingerprints and versions on one website. |
POST /stack/articles/divi |
0.005 USDC | Monitor observed Divi fingerprints and versions on one website. |
POST /stack/articles/universal-analytics |
0.005 USDC | Monitor observed Google Universal Analytics fingerprints and versions on one website. |
POST /stack/articles/usercentrics |
0.005 USDC | Monitor observed Usercentrics fingerprints and versions on one website. |
POST /stack/articles/paypal |
0.005 USDC | Monitor observed PayPal fingerprints and versions on one website. |
POST /stack/articles/fastly |
0.005 USDC | Monitor observed Fastly fingerprints and versions on one website. |
POST /stack/articles/apache |
0.005 USDC | Monitor observed Apache HTTP Server fingerprints and versions on one website. |
POST /stack/articles/netlify |
0.005 USDC | Monitor observed Netlify fingerprints and versions on one website. |
POST /stack/articles/adobe-fonts |
0.005 USDC | Monitor observed Adobe Fonts (Typekit) fingerprints and versions on one website. |
POST /stack/articles/crisp |
0.005 USDC | Monitor observed Crisp fingerprints and versions on one website. |
POST /stack/articles/calcom |
0.005 USDC | Monitor observed Cal.com fingerprints and versions on one website. |
POST /stack/articles/mailchimp |
0.005 USDC | Monitor observed Mailchimp fingerprints and versions on one website. |
POST /stack/articles/newrelic |
0.005 USDC | Monitor observed New Relic fingerprints and versions on one website. |
POST /stack/articles/hcaptcha |
0.005 USDC | Monitor observed hCaptcha fingerprints and versions on one website. |
POST /stack/articles/rankmath |
0.005 USDC | Monitor observed Rank Math fingerprints and versions on one website. |
POST /stack/articles/vimeo-embed |
0.005 USDC | Monitor observed Vimeo embed fingerprints and versions on one website. |
POST /stack/articles/drupal |
0.005 USDC | Monitor observed Drupal fingerprints and versions on one website. |
POST /stack/articles/shopware |
0.005 USDC | Monitor observed Shopware fingerprints and versions on one website. |
POST /stack/articles/react |
0.005 USDC | Monitor observed React fingerprints and versions on one website. |
POST /stack/articles/bootstrap |
0.005 USDC | Monitor observed Bootstrap fingerprints and versions on one website. |
POST /stack/articles/wpbakery |
0.005 USDC | Monitor observed WPBakery Page Builder fingerprints and versions on one website. |
POST /stack/articles/matomo |
0.005 USDC | Monitor observed Matomo fingerprints and versions on one website. |
POST /stack/articles/borlabs |
0.005 USDC | Monitor observed Borlabs Cookie fingerprints and versions on one website. |
POST /stack/articles/klarna |
0.005 USDC | Monitor observed Klarna fingerprints and versions on one website. |
POST /stack/articles/akamai |
0.005 USDC | Monitor observed Akamai fingerprints and versions on one website. |
POST /stack/articles/litespeed |
0.005 USDC | Monitor observed LiteSpeed fingerprints and versions on one website. |
POST /stack/articles/github-pages |
0.005 USDC | Monitor observed GitHub Pages fingerprints and versions on one website. |
POST /stack/articles/fontawesome |
0.005 USDC | Monitor observed Font Awesome fingerprints and versions on one website. |
POST /stack/articles/tawkto |
0.005 USDC | Monitor observed Tawk.to fingerprints and versions on one website. |
POST /stack/articles/doctolib |
0.005 USDC | Monitor observed Doctolib fingerprints and versions on one website. |
POST /stack/articles/brevo |
0.005 USDC | Monitor observed Brevo fingerprints and versions on one website. |
POST /stack/articles/turnstile |
0.005 USDC | Monitor observed Cloudflare Turnstile fingerprints and versions on one website. |
POST /stack/articles/google-maps |
0.005 USDC | Monitor observed Google Maps fingerprints and versions on one website. |
POST /stack/articles/joomla |
0.005 USDC | Monitor observed Joomla fingerprints and versions on one website. |
POST /stack/articles/magento |
0.005 USDC | Monitor observed Magento / Adobe Commerce fingerprints and versions on one website. |
POST /stack/articles/vue |
0.005 USDC | Monitor observed Vue.js fingerprints and versions on one website. |
POST /stack/articles/tailwind |
0.005 USDC | Monitor observed Tailwind CSS fingerprints and versions on one website. |
POST /stack/articles/gutenberg |
0.005 USDC | Monitor observed Gutenberg block editor fingerprints and versions on one website. |
POST /stack/articles/plausible |
0.005 USDC | Monitor observed Plausible fingerprints and versions on one website. |
POST /stack/articles/complianz |
0.005 USDC | Monitor observed Complianz fingerprints and versions on one website. |
POST /stack/articles/mollie |
0.005 USDC | Monitor observed Mollie fingerprints and versions on one website. |
POST /stack/articles/bunnycdn |
0.005 USDC | Monitor observed Bunny CDN fingerprints and versions on one website. |
POST /stack/articles/iis |
0.005 USDC | Monitor observed Microsoft IIS fingerprints and versions on one website. |
POST /stack/articles/cloudflare-pages |
0.005 USDC | Monitor observed Cloudflare Pages fingerprints and versions on one website. |
POST /stack/articles/bunny-fonts |
0.005 USDC | Monitor observed Bunny Fonts fingerprints and versions on one website. |
POST /stack/articles/tidio |
0.005 USDC | Monitor observed Tidio fingerprints and versions on one website. |
POST /stack/articles/timify |
0.005 USDC | Monitor observed TIMIFY fingerprints and versions on one website. |
POST /stack/articles/cleverreach |
0.005 USDC | Monitor observed CleverReach fingerprints and versions on one website. |
POST /stack/articles/friendlycaptcha |
0.005 USDC | Monitor observed Friendly Captcha fingerprints and versions on one website. |
POST /stack/articles/contao |
0.005 USDC | Monitor observed Contao fingerprints and versions on one website. |
POST /stack/articles/prestashop |
0.005 USDC | Monitor observed PrestaShop fingerprints and versions on one website. |
POST /stack/articles/angular |
0.005 USDC | Monitor observed Angular fingerprints and versions on one website. |
POST /stack/articles/alpinejs |
0.005 USDC | Monitor observed Alpine.js fingerprints and versions on one website. |
POST /stack/articles/fathom |
0.005 USDC | Monitor observed Fathom Analytics fingerprints and versions on one website. |
POST /stack/articles/real-cookie-banner |
0.005 USDC | Monitor observed Real Cookie Banner fingerprints and versions on one website. |
POST /stack/articles/adyen |
0.005 USDC | Monitor observed Adyen fingerprints and versions on one website. |
POST /stack/articles/keycdn |
0.005 USDC | Monitor observed KeyCDN fingerprints and versions on one website. |
POST /stack/articles/caddy |
0.005 USDC | Monitor observed Caddy fingerprints and versions on one website. |
POST /stack/articles/ionos |
0.005 USDC | Monitor observed IONOS fingerprints and versions on one website. |
POST /stack/articles/fontsdotcom |
0.005 USDC | Monitor observed Monotype Fonts.com fingerprints and versions on one website. |
POST /stack/articles/zendesk-chat |
0.005 USDC | Monitor observed Zendesk fingerprints and versions on one website. |
POST /stack/articles/shore |
0.005 USDC | Monitor observed Shore fingerprints and versions on one website. |
POST /stack/articles/klaviyo |
0.005 USDC | Monitor observed Klaviyo fingerprints and versions on one website. |
POST /stack/articles/neos |
0.005 USDC | Monitor observed Neos fingerprints and versions on one website. |
POST /stack/articles/oxid |
0.005 USDC | Monitor observed OXID eShop fingerprints and versions on one website. |
POST /stack/articles/svelte |
0.005 USDC | Monitor observed Svelte / SvelteKit fingerprints and versions on one website. |
POST /stack/articles/htmx |
0.005 USDC | Monitor observed htmx fingerprints and versions on one website. |
POST /stack/articles/umami |
0.005 USDC | Monitor observed Umami fingerprints and versions on one website. |
POST /stack/articles/onetrust |
0.005 USDC | Monitor observed OneTrust fingerprints and versions on one website. |
POST /stack/articles/braintree |
0.005 USDC | Monitor observed Braintree fingerprints and versions on one website. |
POST /stack/articles/cloudfront |
0.005 USDC | Monitor observed Amazon CloudFront fingerprints and versions on one website. |
POST /stack/articles/openresty |
0.005 USDC | Monitor observed OpenResty fingerprints and versions on one website. |
POST /stack/articles/wpengine |
0.005 USDC | Monitor observed WP Engine fingerprints and versions on one website. |
POST /stack/articles/self-hosted-fonts |
0.005 USDC | Monitor observed Self-hosted web fonts fingerprints and versions on one website. |
POST /stack/batch |
0.020 USDC | Detect website technologies for 2 to 10 distinct hosts. |
POST /stack/batch/25 |
0.045 USDC | Detect website technologies for 11 to 25 distinct hosts. |
POST /stack/lead-profile |
0.006 USDC | Describe website lead qualification signals with confidence and evidence. |
POST /lead-profile |
0.009 USDC | Qualify a company website with evidenced business and quality signals. |
POST /lead-profile/batch |
0.035 USDC | Qualify 2-5 company website URL slots for one fixed payment. |
POST /stack/prepaid |
0.99 USDC | Buy 400 /stack website technology lookups for 0.99 USDC, valid for 180 days. |
POST /stack/watch |
0.990 USDC | Watch 1-25 public domains for daily technology-stack changes and receive signed webhooks for additions, removals, version changes and newly observed bot walls for 30 days. |
How a call works
curl -s -X POST https://stack.halowerk.com/stack \
-H "Content-Type: application/json" \
-d '{"url":"https://example.com"}'The first call answers with HTTP 402 and the accepted payment terms. An x402 capable client signs the terms and repeats the request; the answer arrives in the same round trip. Any x402 client library, or an MCP client pointed at /mcp, handles this without further setup.
What is reported
- Content management system
- Shop system
- Web framework
- JavaScript library
- Analytics
- Consent tool
- Payment provider
- CDN
- Web server
- Host
- Font source
- Chat tool
- Booking tool
Rules we follow
- robots.txt of the target origin is respected. A disallowed path is refused and never charged.
- One request per host. No path probing, no admin path scanning.
- Bot walls are not bypassed.
- Results are cached for 24 hours per host.
- Private and link local address ranges are refused.
- Confidence never reads 100.
Signatures
234 signatures, written for this service. Wappalyzer closed its fingerprint database in August 2023 and every continuation of it carries GPL-3.0; BuiltWith and WhatRuns are proprietary. None of them is used here. The category list and the evidence kinds are published at /categories.
Discovery
- /openapi.json
- /.well-known/x402
- /mcp — Model Context Protocol
- /pricing
- /categories
- /llms.txt
- /health · /readiness
Operational figures
Rolling 30 day window, updated live: 940916 requests, 1036 of them paid, 1037 settlements, 21 hosts in cache.