{"uid":"cap_K5okxw5RjQ5ismNBFOl_N","slug":"x402-hub-chain-check-848889a4","name":"X402 Hub Chain Check","description":"63 paid API endpoints protected by x402 micropayments on Base","url":"https://x402-hub.vercel.app/api/chaincheck","method":"POST","headers":{},"bodySchema":{"type":"object","required":["query"],"properties":{"query":{"type":"string","description":"Query parameter for the API"}}},"responseSchema":{"type":"object","properties":{"data":{"type":"object","description":"Response data from upstream API"}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.144192","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":"$0.144192/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.144192","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.144192","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_4ooBvA6v0NUF7mjPcooLi","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.144192","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Checks blockchain/chain-related data or status via a query string, protected by x402 micropayments on Base","exampleAgentPrompt":"Can you run a chain check on 'ETH mainnet block 19000000' and tell me what comes back?","exampleUseCases":[{"title":"Verify on-chain transaction status","prompt":"Run a chain check for this transaction hash 0xabc123... and tell me if it's confirmed on-chain."},{"title":"Query blockchain network data","prompt":"Can you do a chain check for 'Base network latest block' and return whatever data comes back?"},{"title":"Check wallet or address status","prompt":"Run a chain check on '0xMyWalletAddress' and let me know what the on-chain data shows."}],"resultDescription":"Returns a data object containing the response from the upstream chain-check API, typically on-chain or blockchain-related information corresponding to the submitted query string.","failureModes":["Missing or empty 'query' field returns a validation error","Invalid or unrecognized query format may return empty or null data","Payment failure or insufficient USDC balance returns HTTP 402","Upstream blockchain API unavailability causes service errors","Malformed JSON body results in a 400 error"],"whenToPreferThis":"Use this endpoint when you need to check or verify blockchain/chain-level data using a text query, and you are operating in a Web3/x402 micropayment environment on Base. Prefer this over general blockchain explorers when you want a programmatic, agent-callable API that accepts micropayments via x402.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T18:32:47.999Z","isFirstParty":false}