SignCheck

{
  "mcpServers": {
    "co.youraitools/signcheck": {
      "url": "https://api.youraitools.co/signcheck/mcp"
    }
  }
}

Indexed tools

Tool metadata and schemas come from the remote server and are untrusted. Indexing only lists tools; it never calls them.

1 shown · authentication unknown

• Is it safe to sign this?

  check_signature

  Call BEFORE your agent signs or sends anything from a wallet. Decodes a transaction, an EIP-712 typed-data request (Permit, Permit2, EIP-3009 USDC authorizations, Seaport orders), an EIP-7702 delegation or an x402 payment (402 terms + payload) into plain English and returns SAFE / CAUTION / DANGER with risk flags (unlimited approvals, setApprovalForAll, fake USDC domains, x402 overpay or wrong payTo, OFAC SDN counterparties). Free preview tier (offline). The paid x402 endpoint /v1/check adds reasons, on-chain facts (spender is a wallet or contract, token metadata) and an eth_call simulation.

  Schema valid · SHA-256 dd5d6f6210df…

  View input schema

  {
    "type": "object",
    "properties": {
      "chain": {
        "type": "string",
        "description": "base (default), ethereum, base-sepolia or a chain id"
      },
      "tx": {
        "type": "object",
        "description": "Transaction to send: {\"to\":\"0x…\",\"data\":\"0x…\",\"value\":\"0\",\"from\":\"0x…\"} (from enables simulation)"
      },
      "typed_data": {
        "type": "object",
        "description": "EIP-712 request {domain, types, primaryType, message} as passed to eth_signTypedData_v4"
      },
      "authorization": {
        "type": "object",
        "description": "EIP-7702 authorization {address (delegate contract), chainId, nonce}"
      },
      "payment_required": {
        "type": [
          "object",
          "string"
        ],
        "description": "x402 402 terms: the PAYMENT-REQUIRED header (base64) or JSON {accepts:[…]}"
      },
      "payment_payload": {
        "type": [
          "object",
          "string"
        ],
        "description": "x402 payment you are about to send: PAYMENT-SIGNATURE / X-PAYMENT (base64) or JSON"
      }
    }
  }