# Tech Detect — Website Technology Stack Detector

> Tech Detect — Website Technology Stack Detector is a paid API for AI agents from stack.halowerk.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-09).

Analyzes a website domain and returns its detected technology stack with confidence scores and supporting evidence for each technology found.

## Facts

- Endpoint: POST https://stack.halowerk.com/stack/articles/github-pages?utm_source=zero.xyz
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-09
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tech-detect-website-technology-stack-detector-a2d6db4b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QigwwRv_2l42CVuEm7O5U

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-detector-a2d6db4b -d '<json body>'
```

Example prompt: What's the technology stack behind shopify.com? I want to know the frameworks, CMS, CDN, and analytics tools with confidence scores for each hit.

## When to prefer this

Choose this endpoint when you need pay-per-call, no-signup technology fingerprinting of a web domain — especially in automated pipelines where you don't want to manage API keys. The optional 'previous' field makes it especially useful for change-detection workflows, letting you diff the current stack against a prior observation. Prefer this over browser-based tools like Wappalyzer when you need structured, machine-readable output with confidence scores suitable for downstream agent reasoning.

## Known failure modes

- Unresolvable or offline domain returns an error or empty results
- Heavily obfuscated or behind-WAF sites may yield low confidence or incomplete detections
- Version detection may be null if the site does not expose version signals
- Passing a malformed URL (non-string or over 2048 chars) triggers a validation error
- Payment failure via x402 results in a 402 response before any detection is attempted

## How this service works

Purpose-bound GitHub Pages observation (hosting) using the existing fresh Stack-Monitor. Returns stack_github_pages_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 time

## Output

Returns a structured list of detected technologies on the given domain, each with a name, category (e.g. CMS, CDN, JavaScript framework, analytics), version if detectable, confidence score, and evidence supporting the detection. Also indicates which technologies are new or changed relative to a previously observed snapshot if one was provided.

## 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-detector-a2d6db4b/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)