# x402 Web Tools – Technology Detector

> x402 Web Tools – Technology Detector is a paid API for AI agents from x402-web-tools.onrender.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-19).

Detects the web technologies, frameworks, and server stack used by any public URL, paid per-call in USDC via x402

## Facts

- Endpoint: GET https://x402-web-tools.onrender.com/api/tech-detect?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-web-tools-technology-detector-228762a0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_IQ2jm6WYz2tRlfU2AlUpy

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 x402-web-tools-technology-detector-228762a0
```

Example prompt: What technologies is https://stripe.com built with — check the server, framework, and any front-end libraries you can detect.

## When to prefer this

Choose this endpoint when you need a no-API-key, pay-per-call solution to identify the technology stack, server, or framework of any public website. Ideal for one-off lookups or agent workflows where provisioning API credentials is impractical. Prefer over browser-based Wappalyzer or BuiltWith integrations when you need a lightweight HTTP call with micropayment billing via x402 on Base.

## Known failure modes

- Non-public or private URLs return an error or empty result
- Highly obfuscated or security-hardened sites may return minimal or no technology signals
- Invalid or malformed URLs cause a request validation error
- Timeout if the target site is slow to respond
- Sites behind WAFs may block the detection probe, yielding incomplete results

## How this service works

Pay-per-call web tools for AI agents. No API keys: pay per request in USDC on Base via x402.

## Output

Returns a JSON object containing the detected server software (e.g. 'Vercel', 'nginx'), the generator or CMS if identifiable, and an array of detected technologies and frameworks (e.g. ['Next.js', 'React', 'Vercel']) for the submitted URL.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "url"
     ],
     "properties": {
      "url": {
       "type": "string",
       "description": "Public http(s) URL"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "url": "https://vercel.com/",
  "server": "Vercel",
  "generator": null,
  "technologies": [
   "Next.js",
   "React",
   "Vercel"
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-web-tools-technology-detector-228762a0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-web-tools.onrender.com](https://www.zero.xyz/host/x402-web-tools.onrender.com/llms.txt)