# Response Header: Access-Control-Allow-Credentials Checker

> Response Header: Access-Control-Allow-Credentials Checker is a paid API for AI agents from site.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-29).

Fetches a URL and returns whether the Access-Control-Allow-Credentials response header is present, its value, and a plain-language interpretation of what the value means for CORS security.

## Facts

- Endpoint: GET https://site.intel.rallylive.ca/site/header/access-control-allow-credentials?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/response-header-access-control-allow-credentials-checker-ee690972
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_LX_boYU9jWaMv19gSMwIM

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 response-header-access-control-allow-credentials-checker-ee690972
```

Example prompt: Check the Access-Control-Allow-Credentials response header on https://api.example.com and tell me whether it's present, what its value is, and whether there's any CORS security risk I should know about.

## When to prefer this

Choose this endpoint when you need a fast, single-header answer specifically about CORS credential exposure (Access-Control-Allow-Credentials) on a given URL. Ideal for security audits, compliance checks, or monitoring pipelines where you only need this one header's status rather than a full HTTP header dump or CORS suite scan.

## Known failure modes

- Target URL is unreachable or times out — no header data returned
- Target URL returns non-HTTP response (e.g. invalid domain) — error returned
- Header is absent — response indicates absence with security risk note
- Network or DNS resolution failure for target domain

## How this service works

The access-control-allow-credentials response header of a URL: whether it is present, its value, and a one-line reading of what the value means (or the risk of its absence for security headers). One header, one answer, for audits and monitoring scripts. $0.01 per check.

## Output

Returns whether the Access-Control-Allow-Credentials header is present on the target URL's HTTP response, its exact value (e.g. 'true' or absent), and a one-line human-readable interpretation of the security implications — such as whether credentials like cookies are exposed to cross-origin requests or whether the absence of the header poses a risk.

## 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",
     "properties": {}
    }
   },
   "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/response-header-access-control-allow-credentials-checker-ee690972/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from site.intel.rallylive.ca](https://www.zero.xyz/host/site.intel.rallylive.ca/llms.txt)