Tool detail

TxSim Decoder

Decodes raw EVM calldata into a function name, signature, arguments and security risk flags (e.g. unlimited approval, ownership transfer).

Categories: Crypto risk

Use when

identify what an EVM transaction's calldata will call before signing
screen calldata for risk flags like unlimited token approval

Not for

not a simulation - no eth_call/revert check (use this provider's /simulate)
not a full pre-sign verdict - use /safe-to-sign for a fused score

Inputs

GET query params: data (hex calldata string, required); to (0x address, optional, context only)

Admitted input schema

{
  "type": "object",
  "properties": {
    "data": {
      "type": "string",
      "minLength": 0,
      "maxLength": 4096,
      "pattern": "^0x[a-fA-F0-9]*$",
      "description": "Transaction calldata (hex, 4-byte selector + ABI args)."
    },
    "to": {
      "type": "string",
      "minLength": 0,
      "maxLength": 4096,
      "pattern": "^0x[a-fA-F0-9]{40}$",
      "description": "Target address (optional, for context only)."
    }
  },
  "required": [
    "data"
  ],
  "additionalProperties": false
}

Endpoint

Method: GET
URL: https://simulate.cyberwarex.com/decode

Payment

Protocol: x402
Listed price: 0.002 USDC per call on Base
Payment method: exact
Network: eip155:8453
Asset: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Listed terms are catalog metadata. The caller supplies inputs and calls the tool outside Onelayer. If payment is required, the caller uses a compatible wallet to pay.

Source

Directory: Coinbase x402 Bazaar
Record: GET https://simulate.cyberwarex.com/decode
Retrieved: 2026-09-30T20:37:07.382Z
Catalog file SHA-256: 6837ccddf886f0007cf3727ea9d27faaa5047b51b4f425345c554ce1c271a524
Catalog built: 2026-09-30T22:31:58.034Z