{"service":"evm-tx-toolkit","endpoint":"/tools/tx_explainer","method":"POST","resource":"https://evm-tx-toolkit.mtree.workers.dev/tools/tx_explainer","description":"EVM transaction explainer for Base, Ethereum, Arbitrum, Optimism, and Polygon. Fetch a confirmed transaction by hash and return a human-readable pre-action/post-trade explanation: programs/contracts invoked, method, token balance changes, approvals, fee/gas used, transfer list, and 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":"Human-readable transaction explanation: swap + approval + balance changes detected.","method":"exactInput","gas_used":184213,"balance_changes":[{"token":"USDC","delta":"-6800.00","address":"0x..."}],"approval_risk":"none","transfers":[{"token":"WETH","amount":"1.85","from":"0x...","to":"0x..."}]}},"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."}