{"uid":"cap_3Sg60BA9Nyk2O8U1VEhH8","slug":"base-toolbox-tx-explain-bf6fbc26","name":"Base Toolbox TX Explain","description":"Base toolbox: before you sign on Base — Uniswap v3 preflight, leftover allowances, tx explain, transfer check. $0.10 USDC. Also $0.001 price/gas/ENS. GET /v1/constants free. No CoinGecko key.","url":"https://basetoolbox.cartonpliant.workers.dev/v1/explain","method":"POST","headers":{},"bodySchema":{"properties":{"input":{"type":"object"},"output":{"type":"object"}}},"responseSchema":{"type":"json","example":{"ok":true,"kind":"approve","next":"confirm_approve"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.1","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","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":"$0.1/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_XAg3F_kw-gYeh6uDUE0YE","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.1","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Decodes and explains a Base blockchain transaction before signing, identifying its kind (e.g. approve, swap) and recommended next step","exampleAgentPrompt":"Before I sign this transaction, can you explain what it's doing — my wallet is showing a raw tx and I need to know if it's an approve, a swap, or something else on Base?","exampleUseCases":[{"title":"Pre-sign transaction safety check","prompt":"I'm about to sign a transaction in my Base wallet but I'm not sure what it does — can you decode it and tell me if it's an approve, a swap, or something suspicious before I confirm?"},{"title":"Uniswap v3 swap preflight","prompt":"I have a Uniswap v3 swap transaction on Base I'm about to submit — can you explain what's happening in the calldata and tell me what the next step should be?"},{"title":"Unknown approval review","prompt":"My wallet just asked me to sign what looks like an approve transaction on Base — can you decode and explain it so I know exactly what allowance I'd be granting and to whom?"}],"resultDescription":"Returns a JSON object with: ok (boolean success flag), kind (transaction classification such as 'approve', 'swap', 'transfer'), and next (recommended next action string like 'confirm_approve'), giving the agent a plain-language understanding of what the transaction will do on-chain.","failureModes":["Malformed or missing input/output transaction object returns an error","Unrecognized transaction calldata may result in an unknown kind classification","Payment of 0.10 USDC not received causes 402 Payment Required response","Non-Base-network transactions may be misclassified or unsupported","Empty or null transaction body returns a validation error"],"whenToPreferThis":"Use this endpoint when an AI agent or user needs to understand what a Base blockchain transaction will do before signing it — especially for Uniswap v3 swaps, ERC-20 approvals, or transfers where calldata is opaque. Prefer this over generic blockchain explorers when you need a structured, machine-readable classification with a recommended next action rather than a block explorer URL. Ideal for pre-signing safety checks in DeFi agent workflows on the Base network.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T18:43:35.571Z","isFirstParty":false}