Tech Stack Detection

Detect the technology a website runs on (CMS, frameworks, analytics, CDN, payments and marketing tools) from its headers and HTML.

Pay by wallet (x402) AI-generated tech-stack-detect

Example

Input

{
  "url": "https://google.com"
}

Answer

{
  "cdn": null,
  "cms": null,
  "url": "https://google.com",
  "hosting": null,
  "analytics": [
    "Google Analytics"
  ],
  "confidence": "low",
  "css_framework": null,
  "meta_framework": null,
  "frontend_framework": null,
  "other_technologies": [
    "Custom JavaScript",
    "Schema.org markup",
    "Nonce-based CSP"
  ]
}

Inputs

Field	Type	Required	What it is
`url`	string	No	Website URL (e.g. https://example.com)
`domain`	string	No	Domain name (e.g. example.com) — use this or url

Output fields

How reliably each field appears in a successful answer.

Field	Type	Appears
`cms`	string	Always (present in every successful answer)
`url`	string	Always (present in every successful answer)
`hosting`	string	Always (present in every successful answer)
`analytics`	array	Always (present in every successful answer)
`css_framework`	string	Always (present in every successful answer)
`frontend_framework`	string	Always (present in every successful answer)

How to call it

The same tool through each route. MCP clients reach it through Strale’s server at https://api.strale.io/mcp; the call below is what the agent sends.

# Needs an API key. max_price_cents caps what this call may cost.
curl -X POST https://api.strale.io/v1/do \
  -H "Authorization: Bearer $STRALE_API_KEY" \
  -H 'Content-Type: application/json' \
  -d '{
    "capability_slug": "tech-stack-detect",
    "inputs": {
      "url": "https://google.com"
    },
    "max_price_cents": 3
  }'

{
  "tool": "strale_execute",
  "arguments": {
    "slug": "tech-stack-detect",
    "inputs": {
      "url": "https://google.com"
    },
    "max_price_cents": 3
  }
}

import { Strale } from "straleio";

const strale = new Strale({ apiKey: process.env.STRALE_API_KEY! });
const result = await strale.do({
  capability_slug: "tech-stack-detect",
  inputs: {
    "url": "https://google.com"
  },
  max_price_cents: 3,
});

import os
from straleio import Strale, DoRequest

strale = Strale(api_key=os.environ["STRALE_API_KEY"])
result = strale.do(DoRequest(
    capability_slug="tech-stack-detect",
    inputs={
        "url": "https://google.com",
    },
    max_price_cents=3,
))

# No account. The first request answers 402 with the price in USDC;
# an x402 client pays it from your wallet and repeats the request.
curl -i 'https://api.strale.io/x402/v2/tech-stack-detect?url=https%3A%2F%2Fgoogle.com'

Limitations

Some website sources are unsupported
Trustpilot, Glassdoor, LinkedIn, Google Search, Google Patents, Reddit and the major social platforms (Facebook, Instagram, X) are not supported and return a policy error before the page is read. Repeating the same request does not return content.
Niche or custom technologies can be missed
Database covers 1,000+ technologies — niche or custom-built tools may not be identified
What to do instead: Check the raw HTTP headers in the response for custom X-Powered-By or Server values that indicate unlisted technology
Server-only technologies are not visible
Detection based on HTTP headers, JavaScript libraries, and HTML signatures — technologies loaded conditionally or server-side only may not be detected
What to do instead: Complement with dns-lookup and ssl-check results to infer infrastructure choices not visible in the HTML
Pages are limited to 16 MiB of HTML
Pages with more than 16 MiB of HTML are refused with a caller_input error naming the input field. The call is not charged, and the page is not retried through another fetch or rendering route.