# LimitGuard Blockchain Wallet Verification

> LimitGuard Blockchain Wallet Verification is a paid API for AI agents from limitguard.ai, paid per call via x402, $0.1/call, status unknown (last checked 2026-10-12).

Verifies a blockchain wallet address by checking on-chain activity and returning risk flags and an activity score

## Facts

- Endpoint: POST https://limitguard.ai/v1/mcp/verify-wallet?utm_source=zero.xyz
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/limitguard-blockchain-wallet-verification-20cb0a56
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_VS_dn4ZDFICo4K80dKqqH

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 limitguard-blockchain-wallet-verification-20cb0a56 -d '<json body>'
```

Example prompt: Before I send payment, check if this Ethereum wallet address 0x1234567890abcdef1234567890abcdef12345678 on Base (eip155:8453) is safe — I need the risk flags and activity score.

## When to prefer this

Use this endpoint when you need a quick, automated risk check on a specific blockchain wallet address before executing a transaction or onboarding a counterparty. Prefer this over full entity compliance checks when you only have a wallet address (not a name/company), and need on-chain derived signals rather than off-chain KYC data. Ideal for agent-to-agent payment flows where wallet trust must be assessed programmatically.

## Known failure modes

- Invalid wallet address format returns validation error
- Unsupported chain_id returns error indicating chain not supported
- Wallet with no on-chain history may return low activity_score with empty risk_flags
- Payment failure (402) if USDC balance insufficient
- Rate limiting if too many requests in short period
- Network timeout if on-chain data provider is slow

## How this service works

MCP tool: verify blockchain wallet address. Checks on-chain activity and risk flags.

## Output

Returns a JSON object with wallet_valid (boolean indicating if address is a valid wallet), activity_score (0-100 integer measuring on-chain activity level), and risk_flags (array of identified risk indicators such as sanctions associations, mixer usage, or unusual patterns)

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "$schema": "https://json-schema.org/draft/2020-12/schema",
   "required": [
    "wallet_address"
   ],
   "properties": {
    "chain_id": {
     "type": "string",
     "description": "CAIP-2 chain ID (default: eip155:8453)"
    },
    "wallet_address": {
     "type": "string",
     "description": "Blockchain wallet address"
    }
   }
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  },
  "sandbox": {
   "type": "object",
   "required": [
    "url"
   ],
   "properties": {
    "url": {
     "type": "string"
    },
    "curl": {
     "type": "string"
    },
    "note": {
     "type": "string"
    }
   }
  },
  "recovery": {
   "type": "object",
   "required": [
    "url"
   ],
   "properties": {
    "url": {
     "type": "string"
    },
    "curl": {
     "type": "string"
    }
   }
  },
  "documentation_url": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "example": {
  "risk_flags": [],
  "wallet_valid": true,
  "activity_score": 72
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/limitguard-blockchain-wallet-verification-20cb0a56/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from limitguard.ai](https://www.zero.xyz/host/limitguard.ai/llms.txt)