Domain Technologies API
Detect every technology on any website — CMS, analytics, frameworks, CDN, hosting, and more. Technology profiling from $0.03/call.
Identify the full technology stack of any domain — CMS, frameworks, analytics, CDNs, hosting, and more. Returns categorized technology data similar to BuiltWith or Wappalyzer but via a simple API call.
Try it live
Fill in the fields and hit Run to see a real response.
{
"ok": true,
"data": {
"domain": "example.com",
"technologies": [
{
"name": "Next.js",
"category": "Framework",
"confidence": 100
},
{
"name": "Vercel",
"category": "Hosting",
"confidence": 100
},
{
"name": "Google Analytics",
"category": "Analytics",
"confidence": 95
},
{
"name": "Tailwind CSS",
"category": "CSS Framework",
"confidence": 90
}
]
}
}Features
The technologies array names each detected product with a category, so you can see at a glance whether a site runs WordPress, Shopify, a specific analytics tag, or an ad platform.
Detection covers infrastructure too — CDN and hosting entries (e.g. Vercel) appear alongside app-layer tech, giving a full picture of how a site is served.
Frontend stacks like Next.js and CSS frameworks like Tailwind are identified, useful for competitive engineering research and integration targeting.
Each technology returns a category and a confidence value (e.g. 100, 95, 90), so your tool can filter to high-confidence detections and group findings by type.
Use cases
Competitive Tech Analysis
Understand what technology stack your competitors use to inform your own technical decisions and identify migration opportunities.
Lead Generation
Build targeted prospect lists by filtering websites that use specific technologies — e.g., find all sites running Shopify or WordPress.
Quick start
Copy this snippet and start making calls.
const res = await fetch('https://api.yepapi.com/v1/seo/domain/technologies', {
method: 'POST',
headers: {
'x-api-key': 'YOUR_API_KEY',
'Content-Type': 'application/json',
},
body: JSON.stringify({
"domain": "example.com"
}),
});
const data = await res.json();
console.log(data);The technology lookup API for developers — detect any site's CMS, framework, CDN & analytics
The Domain Technologies API identifies the full stack behind any website — CMS, frameworks, analytics, CDN, hosting, and JS libraries — returning each as a categorized entry with a confidence score. It is BuiltWith-style detection delivered as a single API call.
It is the tech-fingerprinting tool in YepAPI's domain suite. Combine it with the Whois and Domain Metrics endpoints — one key — to enrich a domain with its stack, registration, and authority data in one workflow.
What is a technology lookup API?
A technology lookup API inspects a website and returns the products it runs as structured data. For a domain you get a technologies array where each entry has a name, a category (Framework, Hosting, Analytics, CSS Framework, and so on), and a confidence score. That tells you a site uses, say, Next.js on Vercel with Google Analytics and Tailwind. It is the programmatic version of viewing a site's tech profile. YepAPI serves it at /v1/seo/domain/technologies: post a domain and receive the categorized, confidence-scored stack as JSON ready to filter and store.
Build your own tech-stack lookup tool
Build a sales-intelligence feature that enriches a CRM lead with the prospect's stack, so reps know a company runs Shopify before they reach out. Build a competitive-research view that fingerprints rivals' frontend and analytics choices. Filter by the confidence score to keep only solid detections, and group by category to render a clean stack summary. Because it is one call per domain, you can enrich lists in a batch — pair with the Whois API to add registrar and age data to each enriched record.
Technology lookup API pricing — $0.03/call
Each detection is a flat $0.03 per domain with no row add-on. Profiling 1,000 prospect domains costs about $30. Dedicated technology-profiling vendors gate their APIs behind $250–$295/mo plans before per-call charges; here you pay three cents per lookup with no subscription, which makes large-scale lead enrichment economical even for a small team.
Build technographic lead lists at scale
Run a list of target domains through the endpoint and filter the results to a technology you sell around — every site running a specific CMS, analytics tool, or ad platform becomes a qualified lead. The confidence score lets you keep only reliable matches, and the category field lets you segment lists by infrastructure versus app-layer choices. This turns a flat domain list into a technographically segmented prospecting database for a few cents per record.
Try the technology lookup API free
Open an account for $5 of free credit, no card needed — enough to fingerprint over a hundred domains. Run it on sites whose stack you already know to confirm the detections and confidence scores, then wire the categorized output into your enrichment or research pipeline before paying.
Start making API calls in 30 seconds
$5 free credit on signup. No credit card required. Pay per call.
What developers say
“Switched from SerpAPI and cut our SERP costs by 80%. Same data quality, way simpler billing.”
“One API key for AI models, SERP data, and web scraping. Saved us from managing 4 separate providers.”
“The $5 free credit let us prototype our entire rank tracking feature before committing. No other API does that.”
Frequently asked questions
Identify the full technology stack of any domain — CMS, frameworks, analytics, CDNs, hosting, and more. Returns categorized technology data similar to BuiltWith or Wappalyzer but via a simple API call.
Each API call costs $0.03. No monthly minimums or subscriptions — you only pay for what you use.
Sign up for a free API key, then send a POST request to /v1/seo/domain/technologies. Check the code example above for a ready-to-use snippet in JavaScript, cURL, or Python.
YepAPI bundles SEO, AI, and web scraping APIs under one key with no monthly minimums. You get lower per-call pricing, a unified dashboard, and one billing account instead of managing multiple providers.
Ready to integrate?
Get your API key and start making calls in 30 seconds. $5 free credit on signup — no credit card required.
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