{"service":"evm-tx-toolkit","endpoint":"/v1/tx/explain","method":"POST","resource":"https://evm-tx-toolkit.mtree.workers.dev/v1/tx/explain","description":"Transaction explainer for agents reviewing Base/EVM activity. Decode a confirmed EVM transaction on Base, Ethereum, Arbitrum, Optimism, or Polygon into a human-readable explanation with contracts invoked, token balance changes, approvals, swap/event labels, function selector, fee/gas used, and a one-line summary.","price":"$0.100","atomic_amount":100000,"network":"eip155:8453","pay_to":"0x1664530DC2A1CA350B1dbaD1Fc1F1a70c90fe4de","inputSchema":{"type":"object","properties":{"chain":{"type":"string","enum":["base","ethereum","arbitrum","optimism","polygon"],"description":"EVM chain slug","example":"base"},"tx_hash":{"type":"string","pattern":"^0x[0-9a-fA-F]{64}$","description":"0x-prefixed transaction hash","example":"0x0000000000000000000000000000000000000000000000000000000000000000"}},"required":["chain","tx_hash"]},"outputSchema":{"example":{"chain":"base","tx_hash":"0x...","summary":"Aerodrome 2-leg swap: 0.1 cbBTC → 6,800 USDC → 1.85 WETH","from":"0x...","to":"0x...","method":"exactInput","gas_used":184213,"transfers":[{"token":"cbBTC","amount":"0.1","from":"0x...","to":"0x..."}],"events":[{"name":"Swap","contract":"Aerodrome:WETH/USDC pool","amount0":"...","amount1":"..."}]}},"canonical_endpoint":"/v1/tx/explain","demo_url":"https://evm-tx-toolkit.mtree.workers.dev/demo/tx/explain","contact_url":"https://evm-tx-toolkit.mtree.workers.dev/contact","hint":"POST this path with an x402 payment. GET/HEAD are metadata checks and are intentionally unpaid."}