# SiteCheck Web Intel CORS Misconfiguration Checker

> SiteCheck Web Intel CORS Misconfiguration Checker is a paid API for AI agents from api.webintel-api.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-25).

Checks a domain's home page for CORS misconfigurations by testing whether the server echoes arbitrary origins or sends wildcard responses with credentials allowed

## Facts

- Endpoint: GET https://api.webintel-api.workers.dev/api/security/cors-misconfig?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-25
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sitecheck-web-intel-cors-misconfiguration-checker-72af34fd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_K4mKNsLg76V_EokULVV6o

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 sitecheck-web-intel-cors-misconfiguration-checker-72af34fd
```

Example prompt: Can you check if example.com has a dangerous CORS misconfiguration — specifically whether it echoes back arbitrary origins or allows credentials with a wildcard?

## When to prefer this

Use this endpoint when you need a quick, low-cost check of a domain's top-level CORS policy for the risky origin-echoing-with-credentials pattern. It is a passive, single-GET probe ideal for reconnaissance, vendor assessments, or pre-deployment security audits. It does not replace a full CORS audit across all API routes but is well-suited for fast triage or bulk domain screening.

## Known failure modes

- Domain does not exist or DNS resolution fails — returns an error with no CORS data
- Site is unreachable or times out — no header data returned
- Only tests the home page (/) — API routes, subdomains, or null origin not covered
- Some servers may not respond to cross-origin requests at all, returning no CORS headers
- Rate limiting or blocking by the target server may produce incomplete results

## How this service works

Checks how a site's home page answers a cross-origin request from a made-up origin: whether it echoes that origin back, sends a wildcard (*), and whether credentials are allowed with it. Echoing an arbitrary origin together with credentials is the risky case. One GET of the home page; it does not test API routes or the null origin.

## Output

Returns whether the domain's home page echoes a fabricated Origin header back in the Access-Control-Allow-Origin response header, whether a wildcard (*) is sent instead, and whether Access-Control-Allow-Credentials is set to true — flagging the most dangerous combination of echoed arbitrary origin plus credentials allowed.

## 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": [
      "domain"
     ],
     "properties": {
      "domain": {
       "type": "string",
       "description": "Domain name such as httpbin.org (required)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sitecheck-web-intel-cors-misconfiguration-checker-72af34fd/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.webintel-api.workers.dev](https://www.zero.xyz/host/api.webintel-api.workers.dev/llms.txt)