# SiteCheck Typosquat & Phishing Domain Radar

> SiteCheck Typosquat & Phishing Domain Radar is a paid API for AI agents from api.fadeandco.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-30).

Generates up to 15 typosquat variants of a brand domain and checks each against the public RDAP directory to identify which are registered

## Facts

- Endpoint: GET https://api.fadeandco.workers.dev/api/agent-intel/typosquat-phishing-domain-radar?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sitecheck-typosquat-phishing-domain-radar-c08e79e4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_fkteo4aWysLbIhNFUM6s_

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-typosquat-phishing-domain-radar-c08e79e4
```

Example prompt: Can you check if anyone has registered typosquat or look-alike domains for stripe.com — I want to know which fake variants are already taken that could be used to phish our customers?

## When to prefer this

Choose this endpoint when you need a fast, lightweight check of whether common typosquat variants of a brand domain are registered, using only the public RDAP directory with no authentication required. It is ideal for brand protection audits, pre-launch domain sweeps, or security triage workflows where you want a quick enumeration of at-risk domains. It does not perform content analysis or IDN homoglyph generation, so pair it with a content-checking tool for deeper phishing confirmation.

## Known failure modes

- RDAP directory may not respond for some TLDs, resulting in 'unknown' states rather than definitive answers
- Only up to 15 variants are generated, so coverage is not exhaustive
- Unicode/IDN homoglyph variants are not generated, leaving a gap in homoglyph detection
- Registered domains are not content-checked, so malicious vs defensive registration is not determined
- Brand domain parsing may strip a full URL to its host, which could cause unexpected behavior if input is malformed

## How this service works

For a brand domain (e.g. paypal.com), builds up to 15 look-alike variants (omitted, doubled and swapped letters, 0/1 homoglyphs, hyphen and login additions, other TLDs) and checks which are registered, using the public RDAP directory. Registered means taken, not malicious: each one needs a content check. Unicode homoglyphs (IDN) are not generated.

## Output

Returns a JSON object with the brand domain checked, the total number of variants checked (up to 15), an array of result objects each with a domain and its registration state ('registered', 'unregistered', or 'unknown'), a list of registered domains, counts of registered and unknown domains, the timestamp of the check, and a note clarifying that registered does not imply malicious intent.

## 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": [
      "brand"
     ],
     "properties": {
      "brand": {
       "type": "string",
       "description": "Brand domain such as paypal.com (a URL is reduced to its host)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "note": "Registered is not proof of phishing; many are defensive or parked. Unknown means the directory did not answer.",
  "brand": "paypal.com",
  "source": "https://rdap.org/domain/",
  "checked": 15,
  "results": [
   {
    "state": "registered",
    "domain": "paypa1.com"
   },
   {
    "state": "registered",
    "domain": "p4ypal.com"
   }
  ],
  "checkedAt": "2026-10-23T09:35:22.654Z",
  "registered": [
   "paypa1.com",
   "p4ypal.com"
  ],
  "unknownCount": 5,
  "registeredCount": 10
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sitecheck-typosquat-phishing-domain-radar-c08e79e4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.fadeandco.workers.dev](https://www.zero.xyz/host/api.fadeandco.workers.dev/llms.txt)