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Prerequisites

Before you start, make sure you have: No credit card or software installation is required.
Want a quick look before signing up? You can search any website’s technology stack directly from the TechnologyChecker homepage. No account required.

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Start scanning in three steps

1

Create your account

Sign up at app.TechnologyChecker.io to get started with 100 free credits.No credit card required. You can sign up with email, Google, or Microsoft.
2

Complete onboarding

The 3-step onboarding wizard helps you get set up:
  1. Choose your plan: Free, Pro, or Scale with side-by-side feature comparison
  2. Set up your organization: Add your logo, name, and optionally create an API key
  3. Invite your team: Add team members by email with role assignments (or skip for later)
You can change your plan or invite more team members at any time from Settings.
3

Scan your first domain

Enter any domain into the search bar to detect its full technology stack. TechnologyChecker uses to detect frontend, backend, and standalone technologies across 40,000+ signatures.Your scan results include:
  • Technologies detected: Frameworks, CMS, analytics, payment processors, and more
  • Company information: , industry, size, and location from LinkedIn
  • Technology timeline: A Gantt chart showing when technologies were first and last detected

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Try the API

Once you’re set up, grab your API key from Settings > Developers (see how to get your API key) and make your first API call. 
curl -H "Authorization: Bearer YOUR_API_KEY" \
  https://api.technologychecker.io/v1/domain/shopify.com

{
  "success": true,
  "data": {
    "domain": "shopify.com",
    "active_technologies": [
      {
        "id": 2,
        "name": "Cloudflare",
        "category": "CDN",
        "first_seen": "2020-05-08 00:00:00",
        "last_seen": "2026-01-08 00:00:00",
        "subdomain": "SHOPIFY.COM"
      },
      {
        "id": 4,
        "name": "SSL by Default",
        "category": "SSL/TLS Certificates",
        "first_seen": "2015-09-08 00:00:00",
        "last_seen": "2026-01-08 00:00:00",
        "subdomain": "SHOPIFY.COM"
      },
      {
        "id": 8,
        "name": "SPF",
        "category": "Email Security",
        "first_seen": "2014-04-08 00:00:00",
        "last_seen": "2026-01-08 00:00:00",
        "subdomain": "SHOPIFY.COM"
      }
    ],
    "historical_technologies": [...]
  }
}
Your API key starts with tapi_live_ for production or tapi_test_ for development. See authentication for details. Each call uses from your plan balance.

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What to explore next

Browse technologies

Explore 40,000+ technologies across 50M+ domains with market share data and historical trends.

Build lead lists

Create targeted prospect lists by combining technology and company filters.

Use the API

Integrate technology data into your CRM, scoring models, or internal tools.

Market research

Analyze market share and adoption trends across technology categories.

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Frequently asked questions

Sign in to app.TechnologyChecker.io, go to Settings > Developers, and click Create API key. Copy the key immediately — it is only shown once. See authentication for details.
Live keys (prefixed tapi_live_) are for production use and consume credits. Test keys (prefixed tapi_test_) are for development and have limited functionality. Both use the same authentication method. See authentication for details.
Most endpoints cost 1 credit per call. Live technology detection costs 5 credits. Usage and credit balance endpoints are free. See the full credit cost table.
A domain scan returns active technologies (name, category, first detected, last detected), historical technologies that are no longer active, and company firmographic data (industry, employee count, location, LinkedIn URL). See domain lookup for details.