{"uid":"cap___IU_cFo2Zf6K8yFSPgki","slug":"b20check-token-legitimacy-verifier-ac90028a","name":"B20Check Token Legitimacy Verifier","description":"Legitimacy check for B20 tokens on Base. Verifies whether an address is a factory-native B20, detects copycats and known-asset imposters (homoglyph-aware), reports live issuer powers (mint, burn, pause, freeze, seize, admin) and issuer activity, and returns a danger/caution/ok verdict as an EIP-712-signed attestation an agent can independently verify.","url":"https://b20check.com/v1/verify/:address","method":"GET","headers":{},"bodySchema":null,"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"registry","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_7JlDF5zApRVrAFfx_pZy2","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Verifies whether a Base blockchain address is a legitimate factory-native B20 token, detecting copycats, impersonators, and reporting live issuer risk powers with a signed EIP-712 verdict.","exampleAgentPrompt":"Before I buy this B20 token, can you run a legitimacy check on the contract address 0x1234...abcd on Base and tell me if it's a real factory-native B20, whether it has any dangerous issuer powers like mint or freeze, and give me the signed verdict?","exampleUseCases":[{"title":"Pre-trade token safety check","prompt":"I'm about to trade a B20 token at address 0xAbCd1234...5678 on Base — can you verify it's a legitimate factory-native token and not a copycat, and tell me what issuer powers it has before I put money in?"},{"title":"Detecting homoglyph imposters","prompt":"This token calls itself 'USDC' but the contract is 0x9988...aabb — can you check if it's actually a known-asset imposter using homoglyph tricks and give me a signed danger/caution/ok verdict?"},{"title":"DeFi bot risk screening","prompt":"Screen the B20 token at 0xDeF0...1122 on Base for me — I need to know if the issuer can still mint, pause, or seize tokens, and whether there's been any recent issuer activity, so I can decide if it's safe to add to my portfolio."}],"resultDescription":"Returns a signed EIP-712 attestation containing a three-tier verdict (danger/caution/ok), whether the address is a factory-native B20, copycat and homoglyph impersonation detection results, a live report of issuer powers (mint, burn, pause, freeze, seize, admin), and recent issuer activity. The signature can be independently verified on-chain.","failureModes":["Invalid or malformed contract address returns an error response","Address not found on Base network returns not-found error","Non-B20 contract address may return a danger verdict or unsupported error","Network congestion on Base may cause delayed or timeout responses","Rate limiting if too many requests are made without payment"],"whenToPreferThis":"Use this endpoint when you need to assess the legitimacy and risk profile of a specific B20 token on the Base blockchain before trading or integrating it, especially when you need a cryptographically verifiable (EIP-712 signed) verdict that can be independently validated. Prefer this over generic token scanners when you specifically need B20 factory-native verification, homoglyph-aware impersonation detection, or live issuer power reporting on Base.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T18:36:03.521Z","isFirstParty":false}