# Tech Detect — Website Technology Stack Fingerprinter

> Tech Detect — Website Technology Stack Fingerprinter is a paid API for AI agents from stack.halowerk.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-13).

Detects the full technology stack of any website URL and returns each identified technology with confidence scores and evidence.

## Facts

- Endpoint: POST https://stack.halowerk.com/stack/articles/real-cookie-banner?utm_source=zero.xyz
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tech-detect-website-technology-stack-fingerprinter-ae8ec015
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QR9La9-iQExLcJzlPoUI1

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 tech-detect-website-technology-stack-fingerprinter-ae8ec015 -d '<json body>'
```

Example prompt: Scan real-cookie-banner.com and tell me every technology it's running — frameworks, CMS, analytics tools, CDN, whatever you can detect — with confidence scores and evidence for each hit.

## When to prefer this

Choose this endpoint when you need per-call, no-signup technology detection paid in USDC via x402 — ideal for agents that run ad hoc or infrequent scans without wanting to manage API keys or subscriptions. It also supports incremental diffing via the 'previous' parameter, making it well-suited for change-monitoring workflows. Prefer alternatives if you need bulk batch scanning at high volume where per-call pricing becomes prohibitive.

## Known failure modes

- URL is unreachable or returns non-200 response — detection may be incomplete or fail entirely
- Private or behind-auth sites yield few or no detectable signals
- Obfuscated or minified assets may prevent version detection, returning null for version
- Overly generic CDN-proxied sites may produce low-confidence results
- Malformed URL input returns validation error

## How this service works

Purpose-bound Real Cookie Banner observation (consent) using the existing fresh Stack-Monitor. Returns stack_real_cookie_banner_decision, direct versus inferred status, evidence, optional version difference against a caller-owned baseline and reusable snapshot. Missing fingerprints do not prove absence. No background scheduling, CVE, compatibility or installed-extension inventory. Existing outbound safeguards remain in the injected motor. One public HTTPS root domain, up to150 baseline technolog

## Output

Returns a list of detected technologies for the given URL, each with a name, category (e.g. CMS, JavaScript framework, analytics), version (if detectable), confidence score, and evidence indicating how the technology was identified. Optionally diffs against a previously observed technology snapshot to surface changes.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "url": {
   "type": "string",
   "maxLength": 2048
  },
  "previous": {
   "type": "object",
   "required": [
    "observed_at",
    "technologies"
   ],
   "properties": {
    "observed_at": {
     "type": "string",
     "maxLength": 40
    },
    "technologies": {
     "type": "array",
     "items": {
      "type": "object",
      "required": [
       "name",
       "category",
       "version"
      ],
      "properties": {
       "name": {
        "type": "string",
        "maxLength": 150
       },
       "version": {
        "type": [
         "string",
         "null"
        ],
        "maxLength": 80
       },
       "category": {
        "type": "string",
        "maxLength": 80
       }
      },
      "additionalProperties": false
     },
     "maxItems": 150
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/tech-detect-website-technology-stack-fingerprinter-ae8ec015/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from stack.halowerk.com](https://www.zero.xyz/host/stack.halowerk.com/llms.txt)