Ethereum Transaction Decoder

x402

Ethereum Transaction Decoder is a paid API for AI agents from onchaincheck.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-29).

Returns a human-readable summary of an Ethereum transaction including status, block, sender/recipient, ETH value, gas details, method selector, and decoded ERC-20 token transfers with symbols and amounts.

Price / call$0.005

Seller volume →—

Success—

StatusUnknown

How this service works

Human-readable summary of a Ethereum transaction: status, block and time, sender and recipient, ETH value, gas used and fee, method selector, and decoded ERC-20 transfers with token symbols and amounts.

Output

A JSON object containing: transaction hash, chain (eth), status (success/failure), block number, timestamp, sender address (from), recipient address (to), native ETH value transferred, gas used, fee in ETH, method selector (4-byte), native symbol (ETH), contract created (if any), and an array of decoded ERC-20 token transfers each with from/to addresses, token contract address, token symbol, human-readable amount, and raw amount.

Example use cases

DeFi swap transfer audit

“I got this Ethereum tx hash from a DEX trade: 0x2b7b271e4a988344e4f82589264460f5dae71851a0c0c9f1c8384a21267548b1 — can you break it down and show me every token that moved, how much, and between which addresses?”

Transaction failure investigation

“Can you check whether this Ethereum transaction went through and why it might have failed? Here's the hash: 0x2b7b271e4a988344e4f82589264460f5dae71851a0c0c9f1c8384a21267548b1 — I need the status, gas used, and the fee paid.”

On-chain payment confirmation

“Someone claims they sent me USDC on Ethereum — can you verify the transaction 0x2b7b271e4a988344e4f82589264460f5dae71851a0c0c9f1c8384a21267548b1 and confirm who it came from, the amount, and when it was confirmed?”

Technical details

Endpoint

GEThttps://onchaincheck.dev/eth/tx?utm_source=zero.xyz

When to prefer

Use this endpoint when you need a fully human-readable decode of a specific Ethereum mainnet transaction — especially when you need decoded ERC-20 token transfers with symbols and amounts rather than raw hex logs. Prefer this over a raw RPC call when you want gas fee, status, and token transfer context all in one structured response without building your own ABI decoder.

Side effects

Invalid or malformed transaction hash (not matching ^0x[0-9a-fA-F]{64}$) returns an error
Transaction hash not found on Ethereum mainnet returns empty or error response
Network or RPC timeouts for very recent or pending transactions
Payment of $0.005 USDC via x402 protocol must succeed before data is returned

Input

Schema · Request body

Field	Type	Description
inputrequired	object
output	object

Output

Schema · Response

{
  "type": "json",
  "example": {
    "to": "0x0000000aa232009084Bd71A5797d089AA4Edfad4",
    "fee": "0.000137971046894364",
    "from": "0xc917c3fa468f2c4B9c84C72caA46420eb9825249",
    "hash": "0x2b7b271e4a988344e4f82589264460f5dae71851a0c0c9f1c8384a21267548b1",
    "chain": "eth",
    "value": "0",
    "status": "success",
    "gasUsed": 251716,
    "timestamp": "2026-10-22T15:29:59.000Z",
    "blockNumber": 26249061,
    "nativeSymbol": "ETH",
    "methodSelector": "0x09c5eabe",
    "tokenTransfers": [
      {
        "to": "0x0000000aa232009084Bd71A5797d089AA4Edfad4",
        "raw": "17027742",
        "from": "0x000000000004444c5dc75cB358380D2e3dE08A90",
        "token": "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48",
        "amount": "17.027742",
        "symbol": "USDC"
      },
      {
        "to": "0x0000000aa232009084Bd71A5797d089AA4Edfad4",
        "raw": "25524479608",
        "from": "0x000000000004444c5dc75cB358380D2e3dE08A90",
        "token": "0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2",
        "amount": "0.000000025524479608",
        "symbol": "WETH"
      },
      {
        "to": "0x0000000aa232009084Bd71A5797d089AA4Edfad4",
        "raw": "61185467",
        "from": "0x000000000004444c5dc75cB358380D2e3dE08A90",
        "token": "0xdAC17F958D2ee523a2206206994597C13D831ec7",
        "amount": "61.185467",
        "symbol": "USDT"
      },
      {
        "to": "0x0000000aa232009084Bd71A5797d089AA4Edfad4",
        "raw": "25524505641771054",
        "from": "0x73D53553EE552C1F2A9722E6407D43e41E19593f",
        "token": "0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2",
        "amount": "0.025524505641771054",
        "symbol": "WETH"
      },
      {
        "to": "0x73D53553EE552C1F2A9722E6407D43e41E19593f",
        "raw": "61185467",
        "from": "0x0000000aa232009084Bd71A5797d089AA4Edfad4",
        "token": "0xdAC17F958D2ee523a2206206994597C13D831ec7",
        "amount": "61.185467",
        "symbol": "USDT"
      }
    ],
    "contractCreated": null
  }
}

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