{"uid":"cap_FdXwnbQ74bENZ-Rv9OYuS","slug":"zayguard-transaction-assessment-aab53d3d","name":"ZayGuard Transaction Assessment","description":"Agent-facing assessment intelligence: pay $0.05 USDC through x402 for a read-only Base transaction result.","url":"https://zayguard.onrender.com/v1/assessments","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"data":{"type":"string","pattern":"^0x(?:[0-9a-fA-F]{2})*$","description":"Optional calldata."},"chain":{"enum":["base","arbitrum"],"type":"string","description":"Network being assessed. Base or Arbitrum One."},"value_wei":{"type":"integer","default":0,"minimum":0,"description":"Optional proposed native-value amount in wei."},"to_address":{"type":"string","pattern":"^0x[0-9a-fA-F]{40}$","description":"Proposed recipient or contract: canonical lowercase or valid EIP-55 checksummed EVM address."},"from_address":{"type":"string","pattern":"^0x[0-9a-fA-F]{40}$","description":"Proposed transaction sender: canonical lowercase or valid EIP-55 checksummed EVM address."}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.05","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":"$0.05/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_l5lbqZg_kHFOUUfopoluv","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.05","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Simulates and assesses a proposed Base blockchain transaction read-only, returning a risk/safety evaluation before execution.","exampleAgentPrompt":"Before I sign this transaction, can you run it through ZayGuard to assess whether it's safe? The sender is 0xAbCd1234567890abcdef1234567890abcdef1234, recipient contract is 0xDeadBeef00000000000000000000000000000001, with calldata 0xa9059cbb000000000000000000000000 and 0 ETH value on Base.","exampleUseCases":[{"title":"Pre-sign DeFi contract safety check","prompt":"I'm about to call a DeFi contract on Base — can you assess this transaction for me before I sign? From 0xAaBb112233445566778899aAbBcCdDeEfF001122, to 0x1111111254EEB25477B68fb85Ed929f73A960582, with calldata 0x12aa3caf and zero ETH value."},{"title":"Suspicious airdrop contract screening","prompt":"Someone sent me an airdrop link and I want to make sure the contract isn't a drain. Can you assess the transaction with ZayGuard — sender 0xUserWallet000000000000000000000000000001, contract 0xSuspect00000000000000000000000000000099, calldata 0x23b872dd, 0 wei on Base?"},{"title":"Agent wallet transaction pre-clearance","prompt":"My agent is about to execute a token approval on Base — run a ZayGuard assessment first. From address 0xAgentWallet00000000000000000000000000AA, to 0xTokenContract000000000000000000000000BB, calldata 0x095ea7b3, no ETH value attached."}],"resultDescription":"Returns a read-only assessment of the proposed Base transaction, including risk signals, simulation outcome, and safety verdict — without executing or modifying any on-chain state.","failureModes":["Invalid Ethereum address format for from_address or to_address returns a 400 validation error","Malformed calldata not matching hex pattern returns a 400 schema error","Non-Base chain specified returns a 400 error since only 'base' is supported","Unpayable or missing x402 payment header results in a 402 Payment Required response","Service unavailability on Render hosting may return 503 errors","Calldata referencing contracts not deployed on Base may return inconclusive or error results"],"whenToPreferThis":"Choose ZayGuard when you need a lightweight, pay-per-call transaction pre-flight check on Base before committing a signature. It is ideal for AI agents that autonomously execute on-chain actions and need a safety gate, or for wallets wanting a second opinion on suspicious contract calls. Prefer it over general blockchain explorers when you need a structured machine-readable risk assessment rather than raw transaction data.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T12:34:05.715Z","isFirstParty":false}