# CanaryGuard Agent Attestation Verifier

> CanaryGuard Agent Attestation Verifier is a paid API for AI agents from canaryguard-402.onrender.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-17).

Generates a cryptographic attestation report verifying an autonomous AI agent wallet's x402 EIP-3009 payment capability, counterparty reputation score, and zero-drainer history on Base.

## Facts

- Endpoint: GET https://canaryguard-402.onrender.com/v1/verify/agent-attestation?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-17
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/canaryguard-agent-attestation-verifier-25d05340
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ufh954SqAHY06QnDhyPF7

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 canaryguard-agent-attestation-verifier-25d05340
```

Example prompt: Before we proceed with this x402 payment, can you pull a CanaryGuard attestation report on wallet 0xAbC123...def456 to confirm it has a clean drainer history and valid EIP-3009 payment capability on Base?

## When to prefer this

Choose this endpoint when you need cryptographic attestation of an AI agent or merchant wallet's legitimacy before engaging in x402 EIP-3009 payments on Base — especially when counterparty reputation and drainer-free history are required trust signals. Prefer it over generic ENS lookups or on-chain balance checks when you need a structured, multi-dimensional trust report covering payment capability, reputation score, and safety history in a single call.

## Known failure modes

- Invalid or malformed wallet address returns a 400 error
- Wallet not found on Base returns an unverifiable status
- Service domain does not match any known x402 provider
- Rate limiting or payment failure returns a 402 or 429 response
- Transient Base RPC outage may cause lookup failures

## How this service works

Generates a cryptographic attestation report verifying an autonomous AI agent wallet, x402 EIP-3009 payment capability, counterparty reputation score, and zero-drainer history on Base.

## Output

A cryptographic attestation report containing: verification of the wallet's x402 EIP-3009 payment capability, a counterparty reputation score, confirmation of zero-drainer history on Base, and optionally domain-specific service verification — all signed as a tamper-evident report.

## 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": [
      "agent_wallet"
     ],
     "properties": {
      "agent_wallet": {
       "type": "string",
       "description": "Agent or merchant EVM wallet address (0x...)"
      },
      "service_domain": {
       "type": "string",
       "description": "Optional x402 service domain to verify"
      }
     }
    }
   },
   "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/canaryguard-agent-attestation-verifier-25d05340/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from canaryguard-402.onrender.com](https://www.zero.xyz/host/canaryguard-402.onrender.com/llms.txt)