# CYRE Guardian Lookalike Detector

> CYRE Guardian Lookalike Detector is a paid API for AI agents from cyre.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).

Checks whether a destination crypto address looks suspiciously similar to known contacts by detecting prefix/suffix traps, near-edits, and confusable characters before funds are sent

## Facts

- Endpoint: GET https://cyre.dev/api/lookalike
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/cyre-guardian-lookalike-detector-16dd90bc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_g6SCoUVX64man3IGEecd2

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 cyre-guardian-lookalike-detector-16dd90bc
```

Example prompt: Before I send payment to 0xA1b2C3d4E5F6...abc9, check if it looks like a lookalike or near-edit of any of my known contacts: 0xA1b2C3d4E5F6...abc8, 0xDeadBeef...1234.

## When to prefer this

Choose this endpoint when an AI agent needs to screen a single destination address for visual spoofing or near-edit similarity against a known set of contacts before authorizing a payment. It is pattern-focused (not a verdict engine), making it ideal for lightweight pre-flight checks in agentic payment pipelines. Prefer it over full risk-scoring endpoints when you only need lookalike signal, not a full risk profile.

## Known failure modes

- Missing required 'candidate' query parameter returns an error
- Too many contacts supplied (over 20) may be rejected
- Malformed address strings may yield no meaningful pattern matches
- Network or payment authorization failure returns HTTP 402 or 5xx
- Empty contacts list means no comparison baseline — patterns returned will be limited

## How this service works

Guardian Lookalike — before your agent sends funds, check whether the destination looks like one of your known contacts (prefix/suffix traps, near-edits, confusable chars). Patterns, not verdicts. Agent guide: https://cyre.dev/SKILL.md

## Output

Returns a set of detected lookalike patterns and signals (not a binary verdict) indicating whether the candidate address shares suspicious prefix/suffix overlaps, near-edit distances, or confusable Unicode/hex characters with any of the supplied known contacts. Patterns are returned for the agent to interpret and act upon.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "candidate"
     ],
     "properties": {
      "to": {
       "type": "string",
       "description": "Alias for candidate"
      },
      "contacts": {
       "type": "string",
       "description": "Comma-separated known addresses (≤20)"
      },
      "candidate": {
       "type": "string",
       "description": "Destination / to address"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/cyre-guardian-lookalike-detector-16dd90bc/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from cyre.dev](https://www.zero.xyz/host/cyre.dev/llms.txt)