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EVM Transaction Decoder
x402
EVM Transaction Decoder is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-16).
Decodes an EVM transaction by hash, returning the called method with parameter names, token transfers, value, fee, status, revert reason, and address labels across multiple EVM networks.
Price / call$0.004
Success—
StatusUnknown
How this service works
An EVM transaction explained: method called and its decoded parameters with names (when the contract is verified), token transfers it triggered, value, fee, status, revert reason and names of the addresses involved.
Output
A JSON object containing the decoded method name and its named parameters (if the contract is verified), an array of token transfers triggered by the transaction, the native value transferred, the fee in native token, the transaction status (success/failure), the revert reason if applicable, ENS names and labels for addresses involved, block number, timestamp, confirmations, and the network.
Example use cases
Debug a failed smart contract call
“This transaction on Arbitrum failed — hash 0x7f3a...9c12 — can you tell me why it reverted and what method it was trying to call?”
Track token transfers in a DeFi swap
“What token transfers happened in this Base transaction 0x4d2e...8b77? I want to know which tokens moved, in what amounts, and between which addresses.”
Audit an on-chain payment
“Can you decode this Polygon transaction 0xf1cc...30ab and confirm the value sent, the fee paid, the block it was included in, and the names of the sender and receiver?”
Technical details
Endpoint
POSThttps://api.vextorium.com/tx-decodificada-pago?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a human-readable breakdown of any EVM transaction — especially when you want decoded method names and parameters (not just raw calldata), token transfer lists, and labeled address names. It covers six major EVM networks (Ethereum, Base, Arbitrum, Optimism, Polygon, zkSync) in a single call. Prefer it over raw RPC calls when you need enriched, interpreted data rather than raw hex output.
Side effects
- Invalid or malformed transaction hash returns an error
- Transaction hash not found on the specified network returns null or error
- Unverified contract ABI means method and parameters cannot be decoded (returned as null)
- Unsupported network value (outside the enum) causes a validation error
- Network mismatch (hash exists on a different chain than specified) returns not found
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| red | string | |
| hash | string |
Tags
x402
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