# GeekVault Web Tech Detector

> GeekVault Web Tech Detector is a paid API for AI agents from api.geekvault.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-29).

Detects the technology stack of a website by analyzing its HTTP headers and returning a list of identified technologies.

## Facts

- Endpoint: GET https://api.geekvault.dev/web-tools/v1/tech-detect?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/geekvault-web-tech-detector-f842d170
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_GKHck2rSo5EOJN6dfwKhT

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 geekvault-web-tech-detector-f842d170
```

Example prompt: What technology stack is https://example.com running on — can you detect what CMS, server software, or frameworks it's using?

## When to prefer this

Choose this endpoint when you need a fast, no-signup, pay-per-call technology fingerprinting check on any public URL — especially useful for one-off lookups during competitive research, security audits, or dev verification where subscribing to a full-featured tool like Wappalyzer's API is overkill. Ideal for agents that need lightweight tech detection without managing API keys.

## Known failure modes

- Invalid or unreachable URL returns an error — ensure the URL is well-formed and the target site is publicly accessible
- Some sites block automated requests or hide headers, resulting in an empty 'detected' array and null headers
- Sites using CDNs or reverse proxies may only expose proxy-level headers, obscuring the real backend stack
- Timeouts may occur for slow-responding or geographically restricted URLs

## How this service works

Network, docs, image, web, and dev utility tools paid per call via x402. No signup, no API keys, no subscriptions — just USDC on Base.

## Output

Returns a JSON object containing a 'detected' array of technology names identified from the website (e.g. ['WordPress', 'Nginx', 'PHP']), plus 'server_header' and 'powered_by_header' string fields extracted from HTTP response headers (either a string value or null if not present).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "url"
 ],
 "properties": {
  "url": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "detected"
 ],
 "properties": {
  "detected": {
   "type": "array",
   "items": {
    "type": "string"
   }
  },
  "server_header": {
   "type": [
    "string",
    "null"
   ]
  },
  "powered_by_header": {
   "type": [
    "string",
    "null"
   ]
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/geekvault-web-tech-detector-f842d170/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.geekvault.dev](https://www.zero.xyz/host/api.geekvault.dev/llms.txt)