# Tech Detect — Website Technology Stack Detection

> Tech Detect — Website Technology Stack Detection 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).

Analyzes a given domain URL and returns the full technology stack with confidence scores and evidence for each detected technology.

## Facts

- Endpoint: POST https://stack.halowerk.com/stack/articles/svelte?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-detection-e6750eda
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_aelppzOFTvHqbEGhTt3E6

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-detection-e6750eda -d '<json body>'
```

Example prompt: Can you scan stripe.com and tell me what technologies they're using — frameworks, CDNs, analytics tools, anything you can detect — with confidence scores for each?

## When to prefer this

Choose this endpoint when you need fast, pay-per-call technology fingerprinting with no API key or subscription required. It is especially well-suited for one-off lookups, agent workflows that profile domains on demand, or competitive intelligence pipelines where you pay only for what you use. The optional 'previous' field makes it ideal for change-detection workflows where you want to diff against a prior scan. Prefer alternatives if you need bulk batch scanning at volume discounts or if you require real-time JavaScript-rendered page analysis.

## Known failure modes

- URL is unreachable or returns non-200 status — detection fails or returns empty results
- Domain is behind heavy bot protection (Cloudflare under attack mode) — limited or no technologies detectable
- Malformed or non-URL input — validation error returned
- Private or intranet domains — no public signals available
- URL exceeds 2048 character limit — request rejected
- Payment via x402 fails or USDC balance insufficient — call not processed

## How this service works

Domain in, technology stack out. Confidence and evidence for every hit. Pay per call in USDC over x402. No signup, no API key.

## Output

Returns a structured list of detected technologies, each with a name, category (e.g. 'JavaScript Framework', 'CDN', 'Analytics'), version where detectable, a confidence score, and supporting evidence (e.g. HTTP headers, script patterns, meta tags) that justify the detection.

## 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-detection-e6750eda/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)