Tool detail

tx-decode

Decodes EVM calldata or a Base transaction hash into a readable function signature, selector, and typed arguments.

Categories: Utilities

Use when

decode raw EVM calldata into a function name and arguments
decode a Base transaction hash into its function call
identify a function selector from calldata

Not for

schema marks data and tx both required, though the description implies only one is needed
not for chains other than EVM/Base

Inputs

GET query params: data (required), tx (required) per schema; calldata, txhash, to also accepted (all optional)

Admitted input schema

{
  "type": "object",
  "properties": {
    "calldata": {
      "type": "string",
      "minLength": 0,
      "maxLength": 4096,
      "description": "Calldata (optional)"
    },
    "data": {
      "type": "string",
      "minLength": 0,
      "maxLength": 4096,
      "description": "Data (required)"
    },
    "to": {
      "type": "string",
      "minLength": 0,
      "maxLength": 4096,
      "description": "Target format (optional)"
    },
    "tx": {
      "type": "string",
      "minLength": 0,
      "maxLength": 4096,
      "description": "Tx (required)"
    },
    "txhash": {
      "type": "string",
      "minLength": 0,
      "maxLength": 4096,
      "description": "Txhash (optional)"
    }
  },
  "required": [
    "data",
    "tx"
  ],
  "additionalProperties": false
}

Endpoint

Method: GET
URL: https://api.x402node.dev/chain/tx-decode

Payment

Protocol: x402
Listed price: 0.05 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://api.x402node.dev/chain/tx-decode
Retrieved: 2026-09-30T20:37:07.382Z
Catalog file SHA-256: 6837ccddf886f0007cf3727ea9d27faaa5047b51b4f425345c554ce1c271a524
Catalog built: 2026-09-30T22:31:58.034Z