{"uid":"cap_JHPgBpUHqflrjx7p8BmLH","slug":"b20-token-freeze-check-e9dc1a27","name":"B20 Token Freeze Check","description":"Checks whether a specific wallet is authorized under a B20 token's transfer-sender policy. If it isn't, that wallet can't transfer and can be burnBlocked() (SEIZED) by the issuer. The personal companion to b20-safety — 'can this token freeze MY funds?'","url":"https://402.com.tr/api/x402/b20-freeze-check","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"},"pathParams":{"type":"object"},"queryParams":{"type":"object","required":["token","wallet"],"properties":{"token":{"type":"string","description":"B20 token address"},"wallet":{"type":"string","description":"Your wallet address"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.03","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":"$0.03/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.03","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.03","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_mYk40uDbXmUwDyPrRo9qj","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.03","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Checks whether a specific wallet is authorized under a B20 token's transfer-sender policy, determining if it can be seized or frozen by the token issuer.","exampleAgentPrompt":"Can you check whether my wallet 0xAbC123...def is authorized under the B20 token at address 0x456...789 — specifically, could the issuer freeze or seize my funds?","exampleUseCases":null,"resultDescription":"Returns whether the specified wallet is authorized under the B20 token's transfer-sender policy, indicating if the wallet can transfer the token or is at risk of being burnBlocked (SEIZED) by the issuer.","failureModes":["Invalid token address returns an error or empty result","Invalid wallet address format causes a 400-level response","Token address is not a B20 token and policy lookup fails","Network or upstream RPC unavailability causes a timeout","Missing required query parameters (token or wallet) returns a validation error"],"whenToPreferThis":"Use this endpoint when a user needs to know specifically whether their wallet can be frozen or seized by a B20 token issuer on Base, particularly before acquiring or holding a B20 token. Prefer this over generic token safety checks when the concern is about transfer restrictions and personal fund seizure risk rather than general contract audits.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T19:02:46.194Z","isFirstParty":false}