{"uid":"cap_njERxt2-5fiLDuWxIgH2y","slug":"coinopselect-attestation-build-api-ce6e53de","name":"CoinOpSelect Attestation Build API","description":"Paid on-chain token, wallet, contract and research data over x402 on Base.","url":"https://coinop.publicvm.com/api/v1/attestation/build?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"input":{"type":"string","example":"summarize the contract"},"output":{"type":"object","example":{"result":"ok"}}}},"responseSchema":{"type":"json","example":{"query":"attestation-build","attestation":{}}},"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_HegRS5AI9vmyT8ZP8KNT5","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":"Builds an on-chain attestation object for a given contract, wallet, or token query using the x402 payment protocol on Base.","exampleAgentPrompt":"Build an attestation for this contract — summarize what it does and return the attestation object so I can verify it on Base.","exampleUseCases":[{"title":"Contract behavior attestation","prompt":"Build an attestation for the USDC contract on Base — I want a structured attestation object that summarizes what the contract does so I can verify it."},{"title":"Wallet activity attestation","prompt":"Generate an attestation for this wallet address on Base — summarize its recent on-chain activity and give me the attestation result."},{"title":"Token research with attestation","prompt":"I need an attestation for the token at this Base contract address — build it with a summary of what the token is and return the attestation data."}],"resultDescription":"Returns a JSON object containing a query identifier (e.g. 'attestation-build') and an attestation object representing the structured, verifiable on-chain data result for the submitted query.","failureModes":["Invalid or missing input string results in a malformed request error","Unparseable contract or wallet address causes query failure","Payment not completed via x402 results in 402 Payment Required response","Network or RPC failure on Base chain causes data unavailability","Empty or ambiguous query string returns an incomplete attestation object"],"whenToPreferThis":"Choose this endpoint when you need a verifiable, structured attestation object built from on-chain Base network data — particularly for smart contract summaries, wallet analysis, or token research that requires a cryptographically anchored result rather than a plain data lookup.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T07:20:34.556Z","isFirstParty":false,"canonicalSlug":"coinopselect-attestation-build-api-ce6e53de"}