{"uid":"cap_pq25_MZX7priU1UWriKH3","slug":"evm-tx-toolkit-mtree-workers-dev-c4e865bd","name":"EVM Transaction Explainer","description":"Decode a confirmed EVM transaction on Base, Ethereum, Arbitrum, Optimism, or Polygon into a human-readable explanation with token transfers, swap/event labels, function selector, gas used, and a one-line summary. Returns JSON. Price 0.10 USDC on Base via x402. Demo/preview: https://evm-tx-toolkit.mtree.workers.dev/demo/tx/explain. Contact: https://evm-tx-toolkit.mtree.workers.dev/contact.","url":"https://evm-tx-toolkit.mtree.workers.dev/v1/tx/explain","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","bodyType","body"],"properties":{"body":{"type":"object","required":["chain","tx_hash"],"properties":{"chain":{"enum":["base","ethereum","arbitrum","optimism","polygon"],"type":"string","example":"base","description":"EVM chain slug"},"tx_hash":{"type":"string","example":"0x0000000000000000000000000000000000000000000000000000000000000000","pattern":"^0x[0-9a-fA-F]{64}$","description":"0x-prefixed transaction hash"}}},"type":{"type":"string","const":"http"},"method":{"enum":["POST"],"type":"string"},"bodyType":{"enum":["json","form-data","text"],"type":"string"}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.100000","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.100000/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.1","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.1","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_68GotbhH-wuAHoW-35M4E","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.1","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Decodes a confirmed EVM transaction hash into a human-readable explanation including token transfers, swap/event labels, function selector, gas used, and a one-line summary","exampleAgentPrompt":"Can you explain what this Base transaction did — 0x4a3f...c9b2 — including what tokens changed hands, which contract was called, and give me a plain-English summary?","exampleUseCases":null,"resultDescription":"Returns a JSON object containing a one-line summary of the transaction, the contracts/programs invoked, the method called, token balance changes, approval events, swap/event labels, function selector, gas used, and a full list of token transfers","failureModes":["Transaction hash not found or not yet confirmed on the specified chain","Unsupported chain specified (only Base, Ethereum, Arbitrum, Optimism, Polygon supported)","Invalid or malformed transaction hash format","Payment not provided or insufficient (requires 0.10 USDC on Base via x402)","RPC timeout or node unavailability for the target chain","Transaction is too complex or involves unsupported contract types for full decoding"],"whenToPreferThis":"Use this endpoint when an agent needs to understand what a confirmed on-chain transaction actually did — particularly for post-trade analysis, audit trails, user-facing explanations, or pre-action research on a known tx hash. Supports Base, Ethereum, Arbitrum, Optimism, and Polygon. Prefer over raw RPC calls when you need a structured, human-readable breakdown rather than raw hex data.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T18:38:27.680Z","isFirstParty":false}