{"uid":"cap_QhpvwtT71OMTWc_AT2Gpz","slug":"b20-activation-status-checker-5ee673cf","name":"B20 Activation Status Checker","description":"Is B20 live on Base mainnet? Queries the Activation Registry precompile for base.b20_asset and base.b20_stablecoin (or a custom feature id). Honest pre-launch too: reports not-activated until the registry flips. ?feature=base.b20_asset (optional)","url":"https://agent402.tools/api/b20-activation-check","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"properties":{"type":"string"}}},"responseSchema":{"type":"json","example":{"features":[{"feature":"base.b20_asset","activated":false,"featureId":"0xcdcc…"}],"registry":"0x8453000000000000000000000000000000000001"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","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":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_X4v1Kmn65U78dsyilyU4A","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Queries the Base blockchain Activation Registry precompile to check whether B20 features (b20_asset and/or b20_stablecoin) are live on Base mainnet","exampleAgentPrompt":"Is B20 live on Base mainnet yet? Check the activation registry for both b20_asset and b20_stablecoin and tell me if either has been activated.","exampleUseCases":null,"resultDescription":"Returns the activation status of one or both B20 features (base.b20_asset and base.b20_stablecoin) as reported by the Base blockchain Activation Registry precompile — indicating whether each feature is activated or not yet live, with honest pre-launch reporting (not-activated until the registry actually flips).","failureModes":["Invalid feature ID string returns error or unknown feature response","Network connectivity issues to Base mainnet cause lookup failure","Registry precompile unavailable leads to timeout or 5xx error","Feature not yet in registry returns not-activated (expected behavior, not an error)"],"whenToPreferThis":"Use this endpoint when you need a reliable, honest on-chain source of truth for whether B20 features are activated on Base mainnet — especially useful pre-launch when you want accurate 'not yet activated' status rather than speculation. Prefer this over off-chain status pages or social media signals when you need cryptographically verifiable activation state from the registry itself.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T19:14:04.893Z","isFirstParty":false}