YourAITools Counterparty Quick Check

x402

YourAITools Counterparty Quick Check is a paid API for AI agents from api.youraitools.co, paid per call via x402, $0.015/call, status unknown (last checked 2026-10-23).

Performs a rapid risk/trust check on a blockchain address (EVM or Solana), returning a verdict, risk reasons, identity signals, and cross-chain context.

Price / call$0.015

Seller volume →—

Success—

StatusUnknown

How this service works

Crypto counterparty due diligence API. Counterparty due-diligence report: everything in lite plus contract verification and deployer screening (Sourcify), ENS and Basename (forward-verified), cross-chain presence (wrong-chain protection for smart wallets and Safes), Safe owner and contract owner screening and explorer labels. Verdict ok / caution / block with reasons and confidence.

Output

Returns a JSON object containing: a 'verdict' field (ok/warn/alert), a 'confidence' level (high/medium/low), the detected 'kind' of address (eoa, contract, eip7702_delegated_eoa, etc.), ENS identity data if available, cross-chain presence on other networks, a list of 'reasons' with codes/severity/text explaining each signal found, and a human-readable 'summary' string.

Example use cases

Pre-payment risk check for DeFi agent

“I'm about to pay 50 USDC to 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on Base — can you run a quick counterparty check and tell me the verdict before I send it?”

Token approval safety review

“I need to approve the address 0x5a7fc11397e9a8ad41bf10bf13f22b0a63f96f6d on Ethereum to spend my tokens — can you check if it's safe to approve, not just pay?”

Solana wallet trust lookup

“Can you check whether this Solana wallet address 9WzDXwBbmkg8ZTbNMqUxvQRAyrZzDsGYdLVL9zYtAWWM is trustworthy before I interact with it?”

Technical details

Endpoint

GEThttps://api.youraitools.co/counterpartycheck/v1/quick?utm_source=zero.xyz

When to prefer

Choose this endpoint when an AI agent needs a fast, single-call risk signal on a specific blockchain address before executing a payment, approval, or interaction. It is particularly valuable in agentic payment workflows (x402, USDC on Base/Solana) where the agent must decide in real time whether a counterparty is trustworthy. Prefer it over full audit tools when speed matters and a quick verdict with key signals (ENS, EIP-7702, cross-chain presence) is sufficient.

Side effects

Invalid or malformed address format returns an error
Unsupported chain identifier returns a validation error
Address with no on-chain history may return low-confidence results
Rate limiting or payment failure (402) if USDC payment not attached
Network timeouts on slow RPC nodes may delay response

Input

Schema · Request body

Field	Type	Description
inputrequired	object
output	object

Output

Schema · Response

{
  "type": "json",
  "example": {
    "tier": "quick",
    "chain": "ethereum",
    "facts": {
      "kind": "eip7702_delegated_eoa",
      "nonce": 5969,
      "delegate": "0x5a7fc11397e9a8ad41bf10bf13f22b0a63f96f6d"
    },
    "checks": {
      "identity": {
        "ens": {
          "name": "vitalik.eth",
          "verified": true
        }
      },
      "cross_chain": {
        "base": {
          "kind": "eoa",
          "nonce": 0
        }
      }
    },
    "intent": "pay",
    "address": "0xd8da6bf26964af9d7eed9e03e53415d37aa96045",
    "reasons": [
      {
        "code": "eip7702",
        "text": "EOA with an EIP-7702 delegation to 0x5a7fc11397e9a8ad41bf10bf13f22b0a63f96f6d: its code is the delegate contract.",
        "severity": "info"
      },
      {
        "code": "verified",
        "text": "Delegate contract source verified on Sourcify.",
        "severity": "good"
      },
      {
        "code": "ens",
        "text": "ENS name vitalik.eth (reverse record, forward-verified).",
        "severity": "good"
      }
    ],
    "summary": "OK: no risk signal found for this eip7702 delegated eoa on Ethereum (verified, ens).",
    "verdict": "ok",
    "confidence": "high"
  }
}

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