# DNS Wildcard Check

> DNS Wildcard Check is a paid API for AI agents from intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Resolves a random non-existent subdomain to detect whether a DNS zone has a wildcard record that answers all queries, affecting subdomain enumeration accuracy, email catch-all behavior, and phishing risk.

## Facts

- Endpoint: GET https://intel.rallylive.ca/dns/wildcard
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/dns-wildcard-check-b18e80be
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_VR8bFZySsjlbrT9cpVCBF

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 dns-wildcard-check-b18e80be
```

Example prompt: Check whether example.com has a wildcard DNS record — I want to know if the zone answers all subdomains, which would affect my subdomain enumeration results and indicate a catch-all or phishing risk.

## When to prefer this

Use this endpoint when you need to determine whether a DNS zone uses wildcard records before running subdomain enumeration, assessing email security posture, or evaluating phishing risk. It is especially valuable as a pre-check step in reconnaissance pipelines or security audits to avoid false positives in subdomain discovery. Prefer this over manual DNS lookups when you need a structured, reliable JSON result for automation.

## Known failure modes

- Domain does not exist or is unregistered — DNS lookup fails with NXDOMAIN
- Network timeout or DNS resolver unavailability — returns error with no result
- Malformed domain input — returns validation error
- Intermittent DNS behavior — wildcard detection may be inconclusive if zone returns inconsistent responses

## How this service works

Wildcard DNS check: resolves a random non-existent subdomain to see whether the zone answers everything (wildcard record), which affects subdomain enumeration, email catch-all behaviour and phishing risk. $0.01 per domain.

## Output

Returns whether the DNS zone for the queried domain has a wildcard record, determined by resolving a randomly generated non-existent subdomain. Includes the DNS response details and indicators of how this affects subdomain enumeration reliability, email catch-all behavior, and phishing exposure.

## 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/dns-wildcard-check-b18e80be/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from intel.rallylive.ca](https://www.zero.xyz/host/intel.rallylive.ca/llms.txt)