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EVM Transaction Explainer
x402
EVM Transaction Explainer is a paid API for AI agents from tools-agent-x402-production.up.railway.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).
Decodes and explains any EVM blockchain transaction in human-readable language across 11 supported chains
Price / call$0.01
Success—
StatusUnknown
How this service works
Decode and explain any EVM blockchain transaction across 11 chains (Base, Ethereum, Arbitrum, Optimism, Avalanche, Polygon, Mantle, Monad, Plasma, BSC, Hyperliquid). Get a human-readable summary of swaps, transfers, approvals, DeFi interactions, and more.
Output
Returns a JSON object containing the transaction hash, the chain it occurred on, a human-readable summary of what the transaction did (e.g. swap, transfer, approval, DeFi interaction), and a link to the blockchain explorer for that transaction.
Example use cases
Example prompt
“Can you explain what happened in this Base transaction — 0x4a3f1c2d9e8b7a0f5c6d2e1b9f3a4c7d8e2f1b0a3c5d6e7f8a9b0c1d2e3f4a5b — give me a detailed breakdown?”
Technical details
Endpoint
GEThttps://tools-agent-x402-production.up.railway.app/tx-explainerWhen to prefer
Use this endpoint when you need a plain-English explanation of what an EVM transaction did — especially for swaps, transfers, approvals, or DeFi interactions across Base, Ethereum, Arbitrum, Optimism, Avalanche, Polygon, Mantle, Monad, Plasma, BSC, or Hyperliquid. Ideal when a user pastes a transaction hash and wants to understand it without reading raw calldata or logs.
Side effects
- Invalid or malformed transaction hash (not 0x-prefixed or not 64 hex chars) returns an error
- Transaction hash does not exist on the specified chain
- Unsupported chain specified outside the 11 supported networks
- Network timeout or RPC node unavailability for the target chain
- Payment failure — insufficient USDC balance for the $0.01 per-call fee
Input
{
"input": {
"type": "http",
"method": "POST",
"queryParams": {
"chain": "ethereum",
"txHash": "0x5c504ed432cb51138bcf09aa5e8a410dd4a1e204ef84bfed1be16dfba1b22060",
"outputLevel": "summary"
}
}
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
{
"chain": "Ethereum",
"txHash": "0x5c504ed432cb51138bcf09aa5e8a410dd4a1e204ef84bfed1be16dfba1b22060",
"summary": "Transferred less than 0.0001 ETH to 0x5df9",
"explorerUrl": "https://etherscan.io/tx/0x5c504ed432cb51138bcf09aa5e8a410dd4a1e204ef84bfed1be16dfba1b22060"
}Tags
x402
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