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Base Transaction Lookup
x402
Base Transaction Lookup is a paid API for AI agents from ca-tax-api-mainnet.lxtap.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-23).
Returns a human-readable summary of a Base blockchain transaction including status, block, time, sender, recipient, ETH value, gas usage, fee, method selector, and decoded ERC-20 transfers.
Price / call$0.005
Success—
StatusUnknown
How this service works
Pay-per-call data for AI agents, paid in USDC on Base with x402: token risk checks (rug check) on Base, Ethereum, Arbitrum, Optimism, Polygon and Solana, onchain reads (balances, transactions, gas, contracts, NFTs, whale trades, new pools, ENS and Basenames), ECB exchange rates, and Canadian sales tax and business days.
Output
Returns a structured, human-readable summary of the specified Base transaction including: success/failure status, block number, timestamp, from and to addresses, ETH value transferred, gas used and total fee paid, the method selector called, and a decoded list of ERC-20 transfers with token symbols and amounts.
Example use cases
Verify a crypto payment received
“I just got told a payment was sent to me on Base — the transaction hash is 0xabc123...def456. Can you pull up the full details so I can confirm the amount, sender, and whether it actually went through?”
Audit ERC-20 token transfers in a tx
“Can you decode Base transaction 0x7f8e9d... and tell me exactly which ERC-20 tokens were transferred, the amounts, and the token symbols?”
Check gas cost of a past transaction
“I need to know how much gas was used and what the total fee was for Base transaction 0x2c4d6e... — I'm trying to calculate my on-chain costs for accounting purposes.”
Technical details
Endpoint
GEThttps://ca-tax-api-mainnet.lxtap.workers.dev/base/tx?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a complete, human-readable breakdown of a single Base transaction by hash, especially when you need decoded ERC-20 transfer data alongside gas and sender/recipient details. Prefer this over raw RPC calls when you want pre-parsed, structured output without handling ABI decoding yourself. Best for accounting, audit, and verification workflows on the Base L2 network specifically.
Side effects
- Invalid transaction hash format (must be 0x followed by 64 hex characters) — returns validation error
- Transaction hash not found on Base — returns not found error
- Transaction still pending (not yet mined) — may return incomplete data or error
- Network or RPC timeout — returns service error
- Payment failure (insufficient USDC balance for x402 micropayment) — returns 402 Payment Required
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"to": "0xd6145b2D3F379919E8CdEda7B97e37c4b2Ca9c40",
"fee": "0.000001440003084728",
"from": "0xf87F67497C535f856670518a3577b2bfC1bEE976",
"hash": "0xff80142e4591e95e4088a7f37838e359843151633209f62a3b39f85402cc7d06",
"chain": "base",
"value": "0.0005",
"status": "success",
"gasUsed": 130678,
"timestamp": "2026-10-22T15:30:13.000Z",
"blockNumber": 52946833,
"nativeSymbol": "ETH",
"methodSelector": "0x3593564c",
"tokenTransfers": [
{
"to": "0xf87F67497C535f856670518a3577b2bfC1bEE976",
"raw": "1198173",
"from": "0x1C450D7d1FD98A0b04E30deCFc83497b33A4F608",
"token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "1.198173",
"symbol": "USDC"
},
{
"to": "0x1C450D7d1FD98A0b04E30deCFc83497b33A4F608",
"raw": "500000000000000",
"from": "0xd6145b2D3F379919E8CdEda7B97e37c4b2Ca9c40",
"token": "0x4200000000000000000000000000000000000006",
"amount": "0.0005",
"symbol": "WETH"
}
],
"contractCreated": null
}
}Tags
x402
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