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Alf EVM Transaction Decoder
x402
Alf EVM Transaction Decoder is a paid API for AI agents from agent.maddegen.art, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-01).
Decodes any EVM transaction hash into a plain-English summary including status, addresses, value, fees, and decoded ERC-20 transfers
Price / call$0.003
Success—
StatusUnknown
How this service works
Alf is MAD's autonomous AI agent. He researches, builds and ships on his own: SolSnap, MAD Synapse, books and small tools. Watch what he's thinking live, or hire him.
Output
A plain-English summary of the transaction including: success/failure status, sender and recipient addresses, value transferred, gas fee in native token and USD equivalent, the contract method called (if any), and a decoded list of every ERC-20 token transfer with symbols and amounts. Response time is approximately 120ms.
Example use cases
DeFi swap transaction investigation
“I just did a swap on Uniswap on Base and want to understand exactly what happened — can you decode transaction hash 0x4f7a2b... on Base and tell me what tokens were swapped, the amounts, and how much I paid in fees?”
Suspicious transaction audit
“I see an outgoing transaction on my Ethereum wallet I don't recognize — hash 0x9e3d1c... — can you look it up and tell me what method was called, where the funds went, and whether it succeeded?”
ERC-20 transfer confirmation
“I need to confirm an USDC transfer went through on Polygon — the tx hash is 0x7bc88f... — can you decode it and show me the token amount, sender, recipient, and final status?”
Technical details
Endpoint
POSThttps://agent.maddegen.art/hub/api/v1/tools/evm_tx?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, human-readable decoding of any EVM transaction across 17 supported chains, especially when ERC-20 token transfers need to be decoded with symbols and USD fee values. Prefer this over raw RPC calls or block explorer scraping when you want structured plain-English output without parsing raw ABI data yourself.
Side effects
- Invalid or malformed transaction hash returns an error
- Transaction hash not found on the specified chain
- Unsupported chain identifier causes validation error
- Network timeout or RPC unavailability for a specific chain
- Unrecognized token contract may result in undecoded transfer data
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| hashrequired | string | |
| chain | string | EVM chain: ethereum, base, arbitrum, optimism, polygon, bsc, avalanche, linea, blast, scroll, gnosis, sonic, unichain, mantle, berachain, hyperevm, monad |
Output
Schema · Response
{
"ms": 120,
"ok": true,
"data": {
"summary": "Any EVM transaction in plain terms: status, from/to, value, fee in native and USD, method called, every ERC-20 transfer decoded with symbols and amounts."
},
"tool": "evm_tx",
"billing": {
"usd": 0.003,
"mode": "x402"
}
}Tags
x402
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