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LogicNodes EVM Calldata Decoder
x402
LogicNodes EVM Calldata Decoder is a paid API for AI agents from logicnodes.io, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-30).
Decodes raw EVM transaction calldata into human-readable function names and parameter values using a provided ABI or human-readable signatures
Price / call$0.001
Success—
StatusUnknown
How this service works
Exact answers for AI agents: 40+ tools for EVM chains and Aptos, gas on 14 chains, never a guess. Free tier; pay per call in USDC (x402) on 13 networks.
Output
Returns a JSON object with ok=true, the tool name, and the fully decoded calldata including the matched function name, input parameter names, types, and their decoded values extracted from the raw hex data.
Example use cases
Inspect a suspicious transaction's calldata
“I have this raw calldata from a transaction I don't recognize: 0xa9059cbb000...0001 — can you decode it using the ERC-20 ABI with 'function transfer(address to, uint256 amount)' to tell me what it was trying to do?”
Audit a DeFi contract call
“Decode this calldata from a Uniswap swap transaction using the swapExactTokensForTokens ABI so I can verify the slippage and path that was set before it was submitted on-chain.”
Debug a failed smart contract interaction
“My smart contract call failed and I want to understand what was actually encoded in the calldata. Here's the hex input data and the ABI for the 'function approve(address spender, uint256 amount)' function — can you decode it?”
Technical details
Endpoint
POSThttps://logicnodes.io/paid/v1/tools/evm_calldata_decode?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to reliably decode raw EVM calldata bytes into structured, human-readable function calls and parameters. It is ideal for AI agents that need exact, deterministic decoding without hallucination risk, supports both JSON ABI objects and human-readable signatures, and is priced per-call in USDC via x402 making it suitable for autonomous agent workflows.
Side effects
- Invalid or malformed hex calldata returns a decoding error
- ABI does not match the function selector in the calldata (function not found)
- Empty or missing ABI array causes validation failure
- Calldata too short or truncated leading to incomplete decoding
- Mismatched parameter types between ABI and encoded data
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| abi | array | JSON ABI objects, or human-readable signatures such as "function transfer(address to, uint256 amount)" |
| data | string |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"tool": "evm_calldata_decode"
}
}Tags
x402
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