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Website Tech Stack Checker: CMS, Framework, CDN, Analytics

Detect the technologies a public website uses: CMS or site builder, JavaScript framework, CDN and hosting, web server, analytics and tag managers, advertising pixels, support widgets, payments, consent tools. Each result shows its evidence (header, meta tag, script URL or page source) and a confidence level. Reads one page; respects robots.txt.

x402: $0.005 per callMCP tool: tech_stack_lookup

Input

ParameterTypeDefaultDescription
urlstringOne public http(s) URL or domain. Use this or urls.
urlsarrayUp to 20 URLs or domains; each successfully checked site is one billable result.

* required

Source and freshness

Source and licence
Stated in every response (field source).
Last verified
2026-10-03 (hourly check against the live source)

Use it

HTTP (x402)

curl -i "https://api.ambolt.dev/v1/tech-stack-lookup?url=https%3A%2F%2Fwww.sitemaps.org%2F"

Returns 402 Payment Required with the price until an x402 payment is attached; @x402/fetch does this for you. See Get started.

MCP

{ "mcpServers": { "ambolt": { "url": "https://api.ambolt.dev/mcp" } } }
# then call the tool: tech_stack_lookup

Apify

Not published as an Actor yet.

Example response

{
  "results": [
    {
      "url": "https://www.sitemaps.org/",
      "ok": true,
      "finalUrl": "https://www.sitemaps.org/",
      "status": 200,
      "technologies": [
        {
          "name": "Microsoft IIS",
          "category": "Web server",
          "evidence": [
            "header server"
          ],
          "confidence": "high"
        },
        {
          "name": "ASP.NET",
          "category": "Framework",
          "evidence": [
            "header x-powered-by"
          ],
          "confidence": "high"
        }
      ],
      "categories": [
        "Framework",
        "Web server"
      ],
      "note": "Detection reads one page and its response headers; technologies loaded only after JavaScript runs or on other pages are not seen."
    }
  ],
  "succeeded": 1,
  "failed": 0,
  "billableResults": 1,
  "checkedAt": "2026-10-03T11:03:47.673Z"
}

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