# Toolsmith Web Tech Stack Fingerprinter

> Toolsmith Web Tech Stack Fingerprinter is a paid API for AI agents from toolcall.click, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).

Identifies technologies, frameworks, CDNs, and analytics tools used by a website or domain

## Facts

- Endpoint: GET https://toolcall.click/t/web/techstack
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/toolsmith-web-tech-stack-fingerprinter-f2dbd144
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_X6TZabJZ9k1Tdei8aWS0-

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability toolsmith-web-tech-stack-fingerprinter-f2dbd144
```

Example prompt: Can you fingerprint the tech stack for stripe.com and tell me what CDN, frontend framework, analytics tools, and server software they're running?

## When to prefer this

Choose this endpoint when you need a quick, keyless, pay-per-call tech stack fingerprint for any public domain or URL — particularly useful for competitive intelligence, sales enrichment, security pre-assessment, or market research workflows where you don't want to manage API keys or subscriptions. Prefer it over browser-based tools like BuiltWith or Wappalyzer when operating in an automated agent pipeline that supports x402 micropayments.

## Known failure modes

- Invalid or unreachable URL returns an error or empty technology list
- Private/intranet domains not accessible from the internet will return no data
- Some obfuscated sites may return partial or empty technology fingerprints
- Payment failure (insufficient USDC balance) results in 402 response blocking the call
- Heavily obfuscated or server-side-only apps may yield low technology counts

## How this service works

Detect the technologies a website runs: CMS (WordPress, Shopify, Webflow...), JS framework (Next.js, React, Vue, Angular...), analytics and marketing tools, payments, CDN, hosting, server, language, UI libraries and fonts. Plus server header, generator meta and security-header posture. Pass url= or domain=. Signature-based from the live homepage. JSON response. $0.01 USDC per call, pay via x402, no API key.

## Output

Returns a JSON object containing the domain, server software, a categorized technology breakdown (CDN, payments, analytics, framework, etc.), and a total technology count — e.g. {domain: 'stripe.com', server: 'nginx', technologies: {cdn: ['Cloudflare'], payments: ['Stripe'], analytics: ['Google Analytics'], framework: ['React']}, technologyCount: 4}.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "url"
     ],
     "properties": {
      "url": {
       "type": "string",
       "description": "URL or domain to fingerprint"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "domain": "stripe.com",
  "server": "nginx",
  "technologies": {
   "cdn": [
    "Cloudflare"
   ],
   "payments": [
    "Stripe"
   ],
   "analytics": [
    "Google Analytics"
   ],
   "framework": [
    "React"
   ]
  },
  "technologyCount": 4
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/toolsmith-web-tech-stack-fingerprinter-f2dbd144/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from toolcall.click](https://www.zero.xyz/host/toolcall.click/llms.txt)