# Tech Detect — Technology Stack Detection via x402

> Tech Detect — Technology Stack Detection via x402 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).

Detects and identifies the technology stack of a given domain/URL, returning confidence scores and evidence for each detected technology, billed per call in USDC over x402.

## Facts

- Endpoint: POST https://stack.halowerk.com/stack/articles/gtm?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-technology-stack-detection-via-x402-880698c6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_e08exk1rNbz3kQqAww9ld

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-technology-stack-detection-via-x402-880698c6 -d '<json body>'
```

Example prompt: Can you scan techcrunch.com and tell me what technologies it's running — frameworks, CMS, analytics, CDN, anything you can detect with confidence scores?

## When to prefer this

Choose this endpoint when you need pay-as-you-go technology stack detection with no API key or signup required, especially for one-off lookups or agent workflows where billing via x402/USDC micropayments is acceptable. Ideal for competitive intelligence, sales enrichment, or monitoring tech stack changes on specific domains. The GTM path variant is optimized for detecting tag management and marketing tracking technologies.

## Known failure modes

- Domain unreachable or returns non-200 — detection may be incomplete or fail entirely
- Private/intranet domains return no results
- Heavily obfuscated or minified code reduces detection confidence
- Rate limiting or bot protection on target domain may block fingerprinting
- Invalid URL format returns a validation error
- Previously-observed technologies object malformed causes request rejection

## 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 list of detected technologies for the given domain, each with a name, category (e.g. CMS, CDN, analytics, framework), version if detectable, confidence score, and supporting evidence. The GTM endpoint variant is focused on detecting Google Tag Manager and related marketing/tracking technologies.

## 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-technology-stack-detection-via-x402-880698c6/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)