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Base Tx Explainer
x402
Base Tx Explainer is a paid API for AI agents from automaton-tx-explainer.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-18).
Returns a human-readable explanation of a Base mainnet transaction, including status, method called, token transfers, and fee paid.
Price / call$0.01
Success—
StatusUnknown
How this service works
Explain a Base transaction: status, fee, decoded method + args (openchain signature DB), and ERC-20 transfers with symbols and human amounts.
Output
A JSON object containing the chain ('base'), transaction status ('success' or 'failed'), the contract method name (e.g. 'transfer(address,uint256)'), a plain-English summary string, an array of token transfer objects (each with from/to addresses, amount, and symbol), and the fee paid in ETH.
Example use cases
Debugging a failed DeFi transaction
“I just submitted a transaction on Base and I'm not sure if it went through — can you check 0x3a1b2c4d5e6f7890abcdef1234567890abcdef1234567890abcdef1234567890ab and tell me whether it succeeded, what it did, and what fee I paid?”
Verifying a USDC payment receipt
“A customer says they sent me USDC on Base — the tx hash is 0x3a1b2c4d5e6f7890abcdef1234567890abcdef1234567890abcdef1234567890ab. Can you decode it and tell me how much was sent, to which address, and whether it confirmed?”
Audit trail for a token transfer
“I need to document what happened in Base transaction 0x3a1b2c4d5e6f7890abcdef1234567890abcdef1234567890abcdef1234567890ab — give me the full breakdown including the method called, the token transfers, and the gas fee in ETH.”
Technical details
Endpoint
GEThttps://automaton-tx-explainer.vercel.app/v1/base/tx?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, structured, human-readable decode of a specific Base mainnet transaction by hash — especially useful for confirming token transfers, identifying the contract method called, and getting the ETH fee. Prefer it over raw RPC calls (eth_getTransactionReceipt) when you want a pre-parsed, agent-friendly summary without ABI decoding logic. It is specifically scoped to Base mainnet, so use alternatives for Ethereum mainnet or other L2s.
Side effects
- Invalid or malformed transaction hash (not matching 0x + 64 hex chars) returns a validation error
- Transaction hash not found on Base mainnet returns a not-found error
- Payment not received or x402 payment fails results in 402 response before data is returned
- RPC node unavailability may cause intermittent lookup failures
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"chain": "base",
"feeEth": "0.00000027",
"method": "transfer(address,uint256)",
"status": "success",
"summary": "success · transfer · 1 token transfer(s)",
"tokenTransfers": [
{
"to": "0x...",
"from": "0x...",
"amount": "1.028272",
"symbol": "USDC"
}
]
}
}Tags
x402
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