{"uid":"cap_lAISZjSlOy9etip2NqPFy","slug":"xx402-erc20-token-allowance-risk-checker-base-chain-78203f24","name":"xx402 ERC20 Token Allowance Risk Checker (Base Chain)","description":"Paid Base token, wallet, DeFi, chain-read, x402 buyer/seller discovery, and specialized Bitcoin 15-minute Up/Down prediction-market data packets for autonomous agents and risk tools.","url":"https://x402.xx402.icu/api/base-chain/allowance?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":null,"responseSchema":{"keys":["summary","decision","allowance","token","owner","spender","exposure","unsigned_revoke_call","next_products","priority_queue","risk_breakdown","review_queue","avoid_queue","bucket_counts","source_status","sources"],"type":"json"},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","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":"down","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_1i3VaamUFR-UwTWYLw3K_","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Fetches and risk-assesses the ERC20 token allowance granted by an owner to a spender on the Base blockchain, including exposure analysis and revocation guidance.","exampleAgentPrompt":"Check the USDC allowance on Base that wallet 0xba76c7ECa175f67cFcE475c09498f840176bf497 has approved for spender 0xba76c7ECa175f67cFcE475c09498f840176bf497 — give me the risk summary and tell me if I should revoke it.","exampleUseCases":[{"title":"DeFi approval risk audit","prompt":"I want to know how much USDC spending I've approved for the contract at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base from my wallet 0xba76c7ECa175f67cFcE475c09498f840176bf497 — is the exposure dangerous and do I need to revoke it?"},{"title":"Wallet security sweep before bridging","prompt":"Before I bridge funds, check whether my wallet 0xba76c7ECa175f67cFcE475c09498f840176bf497 has any risky unlimited USDC approvals on Base for spender 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 and give me the unsigned revoke transaction if needed."},{"title":"Autonomous agent allowance monitor","prompt":"Monitor the ERC20 token allowance on Base for owner 0xba76c7ECa175f67cFcE475c09498f840176bf497 and spender 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 — flag if the risk decision is high and queue it for review."}],"resultDescription":"Returns a JSON object with a plain-language risk summary, a risk decision label, the current allowance amount, token metadata, owner and spender addresses, an exposure level assessment, an unsigned revoke transaction call (if applicable), a risk breakdown by category, prioritized next-product recommendations, and source status indicating which on-chain or off-chain data sources were used.","failureModes":["Invalid wallet address format returns a 400 or schema validation error","Unknown or unverified token contract may return incomplete source_status","On-chain RPC unavailability causes source_status failures with partial data","Payment not completed (x402) returns 402 Payment Required before data is served","Very new token contracts may have no risk data, resulting in sparse risk_breakdown"],"whenToPreferThis":"Use this endpoint when you need a structured, risk-annotated view of a specific ERC20 token allowance on the Base chain, especially when you want both the raw allowance figure and actionable risk guidance (decision, exposure level, revocation call) in a single response. Prefer it over raw on-chain RPC calls when you need the risk intelligence layer on top of chain data, and over generic block explorers when you need machine-readable output suitable for autonomous agent decision-making.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-24T04:27:18.735Z","isFirstParty":false,"canonicalSlug":"xx402-erc20-token-allowance-risk-checker-base-chain-78203f24"}