# Wallet Address Risk Lookup for EVM/ETH Chains

> Wallet Address Risk Lookup for EVM/ETH Chains is a paid API for AI agents from base-agent-preflight.bytoken2023.workers.dev, paid per call via x402, $0.1/call, status down (last checked 2026-09-15).

Looks up the risk score, risk level, and sanction/fraud labels for an Ethereum wallet or contract address on the ETH/EVM chain.

## Facts

- Endpoint: GET https://base-agent-preflight.bytoken2023.workers.dev/v1/x402/address-risk/lookup
- Price: $0.1/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/wallet-address-risk-lookup-for-evm-eth-chains-a9a9b669
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qzARjhNLy0yp26_st2rJa

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 wallet-address-risk-lookup-for-evm-eth-chains-a9a9b669
```

Example prompt: Before my agent pays that ETH address 0x94f751f04b98507d31b500b7ed50be68a1514873, can you check its risk score and whether it has any sanction or fraud labels on the ETH chain?

## When to prefer this

Choose this endpoint when you need a fast, low-cost ($0.10 USDC) on-chain risk and sanction label lookup for an EVM/ETH address before authorizing a payment or interaction. It is specifically suited for x402 purchase governance flows where an AI agent must preflight-check a seller or counterparty address. Prefer this over generic KYC APIs when you need blockchain-native risk scoring with provenance metadata and batch audit trails.

## Known failure modes

- Invalid address format (not matching 0x + 40 hex chars) returns a validation error
- Unsupported chain value (only ETH currently supported) returns an enum error
- Address not found in dataset returns hit=false with empty labels (not an error)
- Service unavailable on Cloudflare Workers returns 5xx
- Missing required query parameters (chain or address) returns 400
- Payment not completed (x402 protocol failure) prevents access to the endpoint

## How this service works

Pay-per-request identity, risk, authorization, execution-preflight and evidence APIs for autonomous agents.

## Output

Returns a JSON object with: a boolean 'hit' indicating whether any risk signals were found, the queried 'address' and 'chain', a 'risk_score' (numeric), a 'risk_level' string (e.g. 'none', 'low', 'high'), an array of 'labels' listing any sanction/fraud/exploit tags, 'product' identifier, and 'provenance' metadata including batch key, source keys, source count, and a manifest SHA256 hash for auditability.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "chain",
      "address"
     ],
     "properties": {
      "chain": {
       "enum": [
        "ETH"
       ],
       "type": "string",
       "description": "Chain namespace for the address. Current hosted feed supports ETH/EVM labels."
      },
      "address": {
       "type": "string",
       "pattern": "^0x[a-fA-F0-9]{40}$",
       "description": "Wallet or contract address to screen."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "hit": {
       "type": "boolean"
      },
      "chain": {
       "type": "string"
      },
      "labels": {
       "type": "array"
      },
      "address": {
       "type": "string"
      },
      "dataset": {
       "type": "object"
      },
      "product": {
       "type": "string"
      },
      "provenance": {
       "type": "object"
      },
      "risk_level": {
       "type": "string"
      },
      "risk_score": {
       "type": "number"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "hit": false,
  "chain": "ETH",
  "labels": [],
  "address": "0x94f751f04b98507d31b500b7ed50be68a1514873",
  "product": "public-wallet-risk-lookup",
  "provenance": {
   "batch_key": "2026-W27",
   "source_keys": [],
   "source_count": 0,
   "manifest_sha256": "sha256:example"
  },
  "risk_level": "none",
  "risk_score": 0
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/wallet-address-risk-lookup-for-evm-eth-chains-a9a9b669/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from base-agent-preflight.bytoken2023.workers.dev](https://www.zero.xyz/host/base-agent-preflight.bytoken2023.workers.dev/llms.txt)