108 technologies across CMS, e-commerce platforms, analytics and tag managers, payment providers, JavaScript frameworks and meta-frameworks, server-side languages, web servers, CDNs, hosting, marketing and CRM tools, live chat, A/B testing, search, maps, video, fonts and anti-bot services. The catalogue endpoint lists them all.

How do I know a detection is right?

Every detection carries its evidence, the exact header, cookie, script URL or HTML marker that matched, and a confidence: detected from direct evidence or implied from a certain relationship, such as WooCommerce implying WordPress.

Anything that only appears after JavaScript runs. Each lookup fetches the page HTML once without a headless browser, so technologies loaded dynamically by other scripts can be missed. The documentation says so plainly rather than inflating coverage.

Can I check many sites at once?

Yes. The batch endpoint accepts a list of domains or URLs and returns a result per target, with unreachable sites reported individually.

What does a call cost?

10 tokens per lookup because of the live fetch and analysis. The free plan covers 50 lookups a month.

ToolsMAINTAINED10 tokens / call

Tech Stack API

Detect the CMS, frameworks, analytics, payments, CDN and hosting behind any website

Detect what any website is built with, in one call: CMS, e-commerce platform, analytics and tag managers, payment providers, JavaScript frameworks and meta-frameworks, server-side language and framework, web server, CDN, hosting platform, marketing and CRM tools, live-chat, A/B testing, search, maps, video, fonts and anti-bot services — matched against a curated, self-maintained fingerprint ruleset of 108 technologies. Each lookup performs one live fetch of the target page and matches static evidence only: response headers, cookie names, script and stylesheet URLs, meta tags and anchored HTML markers. Every detection returns the exact evidence that matched (the header, cookie, script URL or marker) and a confidence level — detected from direct evidence, or implied from a certain relationship, such as WooCommerce implying WordPress and Next.js implying React — with framework versions captured where the site exposes them. Scan one site, or up to 10 concurrently in a batch with per-target errors reported inline; list the full detectable catalogue so you know exactly what a scan can and cannot find. Ideal for sales prospecting and lead enrichment (what does this prospect run?), competitor analysis, migration planning and market-share research. Non-public targets are refused, and the ruleset is this provider's own — no third-party detection service behind it.

Every call needs an X-Api-Key header. A free key includes 500 tokens a month, no card required. 10 tokens per call, so the free plan covers about 50 calls a month.

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response.json

{
  "ok": true,
  "url": "https://www.allbirds.com/",
  "final_url": "https://www.allbirds.com/",
  "status": 200,
  "technologies": [
    {
      "name": "Cloudflare",
      "category": "CDN",
      "version": null,
      "confidence": "detected",
      "evidence": [
        "header cf-ray: a3b7cd7f3c26d305-BOG"
      ]
    },
    {
      "name": "Shopify",
      "category": "E-commerce",
      "version": null,
      "confidence": "detected",
      "evidence": [
        "script https://cdn.shopify.com/s/files/1/1104/4168/files/jsEncrypt.js?v=1756910700",
        "html marker /Shopify\\.theme/"
      ]
    },
    {
      "name": "Shop Pay",
      "category": "Payments",
      "version": null,
      "confidence": "detected",
      "evidence": [
        "script https://shop.app/checkouts/internal/preloads.js?locale=en-US&default_configuration_id=2737373264&sho"
      ]
    },
    {
      "name": "Google Tag Manager",
      "category": "Tag manager",
      "version": null,
      "confidence": "detected",
      "evidence": [
        "html marker /googletagmanager\\.com/ns\\.html/"
      ]
    }
  ],
  "by_category": {
    "CDN": [
      "Cloudflare"
    ],
    "E-commerce": [
      "Shopify"
    ],
    "Payments": [
      "Shop Pay"
    ],
    "Tag manager": [
      "Google Tag Manager"
    ]
  },
  "fetched_at": "2026-09-15T12:58:24.776Z"
}

Production Ready: Battle-tested infrastructure with a 99.9% uptime SLA. Rate limits are generous, responses are consistent.
Simple Integration: Standard REST + JSON. Works with any HTTP client. Copy-ready code snippets in 4 languages.
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Use cases for Tech Stack API

Build prospect lists of sites running a specific platform, such as Shopify stores without a reviews app, for sales outreach.
Qualify agency leads by what a prospect already runs, from WordPress and WooCommerce to HubSpot and Stripe.
Track competitor stacks over time to see when they switch CMS, CDN or analytics vendors.
Enrich company records in a CRM with the technologies a customer uses, to route them to the right integration docs.

Tech Stack API endpoints

Every endpoint with its parameters and a real example response.

OpenAPI definition Postman workspace

GETDetect Stack
POSTDetect Stack Batch
GETTechnology Catalogue

GETDetect Stack

https://api-tech-stack.dataandapis.com/v1/stack/{target}

Path parameters

Parameter	Example
target	www.allbirds.com	Required

Query parameters

Parameter	Example
url	https://www.allbirds.com/products	Optional

Example request

curl "https://api-tech-stack.dataandapis.com/v1/stack/www.allbirds.com?url=https%3A%2F%2Fwww.allbirds.com%2Fproducts" \
  -H "X-Api-Key: YOUR_API_KEY"

Example response

{
  "ok": true,
  "url": "https://www.allbirds.com/",
  "final_url": "https://www.allbirds.com/",
  "status": 200,
  "technologies": [
    {
      "name": "Cloudflare",
      "category": "CDN",
      "version": null,
      "confidence": "detected",
      "evidence": [
        "header cf-ray: a3b7cd7f3c26d305-BOG"
      ]
    },
    {
      "name": "Shopify",
      "category": "E-commerce",
      "version": null,
      "confidence": "detected",
      "evidence": [
        "script https://cdn.shopify.com/s/files/1/1104/4168/files/jsEncrypt.js?v=1756910700",
        "html marker /Shopify\\.theme/"
      ]
    },
    {
      "name": "Shop Pay",
      "category": "Payments",
…

Show full response

{
  "ok": true,
  "url": "https://www.allbirds.com/",
  "final_url": "https://www.allbirds.com/",
  "status": 200,
  "technologies": [
    {
      "name": "Cloudflare",
      "category": "CDN",
      "version": null,
      "confidence": "detected",
      "evidence": [
        "header cf-ray: a3b7cd7f3c26d305-BOG"
      ]
    },
    {
      "name": "Shopify",
      "category": "E-commerce",
      "version": null,
      "confidence": "detected",
      "evidence": [
        "script https://cdn.shopify.com/s/files/1/1104/4168/files/jsEncrypt.js?v=1756910700",
        "html marker /Shopify\\.theme/"
      ]
    },
    {
      "name": "Shop Pay",
      "category": "Payments",
      "version": null,
      "confidence": "detected",
      "evidence": [
        "script https://shop.app/checkouts/internal/preloads.js?locale=en-US&default_configuration_id=2737373264&sho"
      ]
    },
    {
      "name": "Google Tag Manager",
      "category": "Tag manager",
      "version": null,
      "confidence": "detected",
      "evidence": [
        "html marker /googletagmanager\\.com/ns\\.html/"
      ]
    }
  ],
  "by_category": {
    "CDN": [
      "Cloudflare"
    ],
    "E-commerce": [
      "Shopify"
    ],
    "Payments": [
      "Shop Pay"
    ],
    "Tag manager": [
      "Google Tag Manager"
    ]
  },
  "fetched_at": "2026-09-15T12:58:24.776Z"
}

POSTDetect Stack Batch

https://api-tech-stack.dataandapis.com/v1/stack

Request body

{
  "targets": [
    "stripe.com",
    "www.allbirds.com",
    "wordpress.org"
  ]
}

Example request

curl -X POST "https://api-tech-stack.dataandapis.com/v1/stack" \
  -H "X-Api-Key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{ "targets": [ "stripe.com", "www.allbirds.com", "wordpress.org" ] }'

Example response

{
  "ok": true,
  "count": 2,
  "results": [
    {
      "url": "https://wordpress.org/",
      "final_url": "https://wordpress.org/",
      "status": 200,
      "technologies": [
        {
          "name": "WordPress",
          "category": "CMS",
          "version": "7.2",
          "confidence": "detected",
          "evidence": [
            "meta generator: WordPress 7.2-alpha-63620",
            "script https://wordpress.org/wp-content/mu-plugins/pub-sync/blocks/language-suggest/build/front.js?ver=415c",
            "link https://wordpress.org/wp-content/mu-plugins/pub-sync/global-fonts/Inter/Inter-latin.woff2"
          ]
        },
        {
          "name": "Google Fonts",
          "category": "Fonts",
          "version": null,
          "confidence": "detected",
          "evidence": [
            "link https://fonts.googleapis.com"
          ]
…

Show full response

{
  "ok": true,
  "count": 2,
  "results": [
    {
      "url": "https://wordpress.org/",
      "final_url": "https://wordpress.org/",
      "status": 200,
      "technologies": [
        {
          "name": "WordPress",
          "category": "CMS",
          "version": "7.2",
          "confidence": "detected",
          "evidence": [
            "meta generator: WordPress 7.2-alpha-63620",
            "script https://wordpress.org/wp-content/mu-plugins/pub-sync/blocks/language-suggest/build/front.js?ver=415c",
            "link https://wordpress.org/wp-content/mu-plugins/pub-sync/global-fonts/Inter/Inter-latin.woff2"
          ]
        },
        {
          "name": "Google Fonts",
          "category": "Fonts",
          "version": null,
          "confidence": "detected",
          "evidence": [
            "link https://fonts.googleapis.com"
          ]
        },
        {
          "name": "Google Tag Manager",
          "category": "Tag manager",
          "version": null,
          "confidence": "detected",
          "evidence": [
            "html marker /googletagmanager\\.com/ns\\.html/"
          ]
        },
        {
          "name": "nginx",
          "category": "Web server",
          "version": null,
          "confidence": "detected",
          "evidence": [
            "header server: nginx"
          ]
        }
      ],
      "by_category": {
        "CMS": [
          "WordPress"
        ],
        "Fonts": [
          "Google Fonts"
        ],
        "Tag manager": [
          "Google Tag Manager"
        ],
        "Web server": [
          "nginx"
        ]
      },
      "fetched_at": "2026-09-15T12:58:26.429Z"
    },
    {
      "target": "localhost",
      "error": "Target must be a public website."
    }
  ]
}

GETTechnology Catalogue

https://api-tech-stack.dataandapis.com/v1/technologies

This endpoint takes no parameters.

Example request

curl "https://api-tech-stack.dataandapis.com/v1/technologies" \
  -H "X-Api-Key: YOUR_API_KEY"

Example response

{
  "ok": true,
  "count": 108,
  "technologies": [
    {
      "name": "Optimizely",
      "category": "A/B testing",
      "rules": 1
    },
    {
      "name": "VWO",
      "category": "A/B testing",
      "rules": 1
    },
    {
      "name": "Adobe Analytics",
      "category": "Analytics",
      "rules": 1
    },
    {
      "name": "Amplitude",
      "category": "Analytics",
      "rules": 1
    },
    {
      "name": "Cloudflare Web Analytics",
      "category": "Analytics",
      "rules": 1
…

Show full response

{
  "ok": true,
  "count": 108,
  "technologies": [
    {
      "name": "Optimizely",
      "category": "A/B testing",
      "rules": 1
    },
    {
      "name": "VWO",
      "category": "A/B testing",
      "rules": 1
    },
    {
      "name": "Adobe Analytics",
      "category": "Analytics",
      "rules": 1
    },
    {
      "name": "Amplitude",
      "category": "Analytics",
      "rules": 1
    },
    {
      "name": "Cloudflare Web Analytics",
      "category": "Analytics",
      "rules": 1
    },
    {
      "name": "Fathom",
      "category": "Analytics",
      "rules": 1
    }
  ]
}

Where the data comes from

Source: A curated, self-maintained fingerprint ruleset of 108 technologies, matched against one live fetch of the target page: response headers, cookies, script and stylesheet URLs, meta tags and HTML markers.
Freshness: Inspected live on every call. The fingerprint ruleset is updated with each release.

One install. Every endpoint.

No proprietary SDKs needed. Any HTTP client works. Pick your language and paste.

3languages

3endpoints

RESTarchitecture

1key for all APIs

Fully typed responses — auto-completion in your IDE
Tracks the API in lockstep — new endpoints land same day
One key works across 125+ APIs on the platform

import axios from 'axios';

const { data } = await axios.get(
  'https://api-tech-stack.dataandapis.com/v1/stack/{target}',
  { headers: { 'X-Api-Key': process.env.API_KEY } }
);

Tech Stack API · X-Api-Key

Explore the endpoints

Browse request parameters and inspect live example responses.

Available Endpoints

Request Parameters

API URL

Headers

X-Api-Key

Query Parameters

url(Optional)

Path Parameters

target

Target:

Client:

import axios from 'axios';

const url = 'https://api-tech-stack.dataandapis.com/v1/stack/{target}';
const { data } = await axios.get(url, {
  headers: { 'X-Api-Key': 'YOUR_API_KEY' }
});