{"uid":"cap_QeZoEzva-VzyIyk7BKe6K","slug":"token-risk-check-base-erc-20-x402-454d89f6","name":"Token Risk Check — Base ERC-20 (x402)","description":"Pay-per-call crypto microdata for trading/onchain AI agents via x402 (USDC on Base): Base gas, token risk, balances, multi-venue prices, Hyperliquid book/funding, kimchi premium. No API keys.","url":"https://kr-x402-mvp.kgy5612.workers.dev/v1/check?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["address"],"properties":{"address":{"type":"string","pattern":"^0x[0-9a-fA-F]{40}$","examples":["0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"],"description":"Base ERC-20 contract"}},"additionalProperties":false}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"chain":"base","flags":["upgradeable_proxy"],"token":{"symbol":"USDC","decimals":6,"holder_count":11391096},"address":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","reasons":["upgradeable proxy (logic can change)"],"trading":{"buy_tax":0,"sell_tax":0,"honeypot_sim":{"is_honeypot":false},"top10_holder_pct":26.49},"verdict":"OK","can_sell":true,"contract":{"is_contract":true,"bytecode_bytes":1852,"verified_source":true},"risk_level":"low","risk_score":5,"should_buy":true}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_9vUqAY9ejjNRyLHPLWftL","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns a risk verdict, risk score, honeypot simulation, trading taxes, holder distribution, and contract metadata for any Base ERC-20 token address.","exampleAgentPrompt":"Before I swap into it, can you run a risk check on the Base token at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 — I want to know if it's a honeypot, what the buy/sell taxes are, and what the overall risk verdict is?","exampleUseCases":[{"title":"Pre-trade honeypot safety check","prompt":"I'm about to buy a new Base memecoin at contract 0x4ed4E862860beD51a9570b96d89aF5E1B0Efefed — can you check if it's a honeypot and whether I'd actually be able to sell it afterward?"},{"title":"DeFi agent trade guard","prompt":"My trading bot is about to swap into 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base — pull the full risk report so I can confirm the risk score is low and there are no dangerous flags before it executes."},{"title":"Token due diligence for portfolio","prompt":"Can you check the risk level, contract verification status, and top-10 holder concentration for the Base token at 0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb? I want to know if it's safe to add to my portfolio."}],"resultDescription":"A JSON object containing: chain identifier ('base'), contract address, token symbol and decimals, holder count, a risk_level string (e.g. 'low'), a numeric risk_score, a verdict string ('OK' or otherwise), boolean flags can_sell and should_buy, honeypot simulation result (is_honeypot boolean), buy_tax and sell_tax percentages, top10_holder_pct, contract metadata (is_contract, bytecode_bytes, verified_source), and an array of human-readable reasons and flags (e.g. 'upgradeable_proxy').","failureModes":["Invalid or malformed address (not a 0x + 40 hex char format) returns a validation error","Non-Base or non-ERC-20 address may return empty or error response","Payment not made via x402 USDC on Base returns 402 Payment Required","Unverified or very new contracts may have incomplete data","Rate limits or worker downtime may yield 5xx errors"],"whenToPreferThis":"Use this endpoint when an AI trading or onchain agent needs a fast, pay-per-use safety check on a Base ERC-20 token before executing a swap or investment — especially when you want honeypot detection, tax analysis, and a risk verdict in a single call without managing API keys. Prefer this over general blockchain explorers when you need a structured, agent-readable risk verdict rather than raw contract data.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-31T18:39:32.974Z","isFirstParty":false,"canonicalSlug":"token-risk-check-base-erc-20-x402-454d89f6"}