# 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 2026-10-12).

Analyzes a website URL and returns its detected technology stack with confidence scores and evidence for each identified technology.

## Facts

- Endpoint: POST https://stack.halowerk.com/stack/articles/magento?utm_source=zero.xyz
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tech-detect-website-technology-stack-fingerprinter-9c505eff
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_tSWJfdWwEOzweFpjHERAV

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-9c505eff -d '<json body>'
```

Example prompt: Can you scan shopify.com and tell me what technologies it's running — I want to know the full stack with confidence scores and evidence for each hit, especially the ecommerce platform, CDN, and frontend frameworks?

## When to prefer this

Choose this endpoint when you need structured, evidence-backed technology detection with confidence scores for a specific domain, especially when you want to track changes over time using the optional previous snapshot parameter. Prefer it over manual Wappalyzer lookups or BuiltWith exports when you need programmatic, pay-per-call access with no API key setup. Ideal for agents doing competitive research, lead qualification, or stack monitoring pipelines.

## Known failure modes

- URL is unreachable or times out — endpoint may return empty results or an error
- Domain blocks fingerprinting techniques — low confidence or missing detections
- Invalid or malformed URL input — schema validation error
- Payment failure via x402 — request rejected before execution
- Previous snapshot schema mismatch — ignored or error if required fields are wrong
- Private/intranet domains not accessible from scanner — no results returned

## How this service works

Purpose-bound Magento / Adobe Commerce observation (shop) using the existing fresh Stack-Monitor. Returns stack_magento_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 technologies; 9s 

## Output

Returns a list of detected technologies for the given domain, each with a name, category (e.g. CMS, CDN, JavaScript Framework), version if detectable, a confidence score indicating detection certainty, and supporting evidence (e.g. HTTP headers, HTML patterns, script fingerprints) that triggered each hit.

## 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-9c505eff/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)