{"uid":"cap_8WNX9MW0vnMspJoCUcSAb","slug":"confidential-claim-verifier-def6e73d","name":"Confidential Claim Verifier","description":"Zero-knowledge attestation service that verifies x402 payment claims without revealing payer identity, wallet balance, or historical spend. Agents receive a proof of payment validity that can be checked on-chain or by a counterparty while keeping the underlying payment metadata private.","url":"https://k2so.wrong.systems/api/services/confidential-claim-verifier","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","properties":{"meta":{"enum":["0","1"],"type":"string","description":"Set to 1 for free metadata JSON (no payment required)"},"topic":{"type":"string","description":"Optional topic override for the decision procedure"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","title":"Confidential Claim Verifier paid response","$schema":"https://json-schema.org/draft/2020-12/schema","required":["ok","paid","service","provider","result"],"properties":{"ok":{"type":"boolean"},"paid":{"type":"boolean"},"result":{"type":"object","required":["ok","service"],"properties":{"ok":{"type":"boolean","description":"Handler success"},"brief":{"type":"string","description":"Decision procedure prose for agents"},"model":{"type":"string"},"topic":{"type":"string"},"service":{"type":"string","description":"Service slug"},"procedure":{"type":"string"},"generatedAt":{"type":"string","description":"ISO-8601 timestamp"},"generationSource":{"enum":["llm","reasoning","deterministic"],"type":"string"}}},"payment":{"type":"object","properties":{"code":{"type":"string"},"payer":{"type":"string"},"detail":{"type":"string"},"selfPay":{"type":"boolean"},"transaction":{"type":"string"}}},"service":{"type":"string"},"provider":{"type":"string","const":"K-2SO"}}}}}}},"responseSchema":{"type":"json","example":{"ok":true,"paid":true,"result":{"ok":true,"brief":"plain prose decision procedure (120+ words)","model":"deepseek/deepseek-v4-flash-0731","topic":"string topic","service":"confidential-claim-verifier","procedure":"same as brief","generatedAt":"2026-01-01T00:00:00.000Z","generationSource":"deterministic"},"service":"confidential-claim-verifier","provider":"K-2SO"}},"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":"down","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_quo310vRz8tmA8AFgYnki","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":"Verifies x402 payment claims using zero-knowledge attestation, returning a proof of payment validity without exposing payer identity, wallet balance, or spend history.","exampleAgentPrompt":"Can you verify that this x402 payment claim is valid without revealing who paid or any wallet details — I need a zero-knowledge proof I can show to the counterparty?","exampleUseCases":[{"title":"Privacy-preserving payment proof for counterparty","prompt":"I need to prove to a vendor that my agent already paid for a service via x402, but I don't want to expose my wallet address or balance — can you get a confidential attestation of the payment validity I can send them?"},{"title":"On-chain payment validity check","prompt":"Before settling this x402 transaction on Base, can you run a zero-knowledge check to confirm the payment claim is legitimate without leaking the payer's identity or spend history?"},{"title":"Agent-to-agent payment verification","prompt":"My agent received an x402 payment claim from another agent — can you verify it's valid and give me a proof I can check on-chain, while keeping all the underlying payment metadata private?"}],"resultDescription":"Returns a structured JSON object containing a boolean validity result (ok), payment status (paid), a decision procedure brief in prose for agents, the service slug, provider identifier (K-2SO), generation source (llm, reasoning, or deterministic), and an ISO-8601 timestamp. The proof can be checked on-chain or presented to a counterparty without revealing payer identity, wallet balance, or historical spend.","failureModes":["Invalid or malformed x402 payment claim returns ok: false with an error detail","Payment claim that cannot be verified on-chain results in a failed attestation","Missing required 'type' or 'method' fields returns a schema validation error","Network or on-chain lookup failures may cause timeouts or incomplete proofs","Unsupported HTTP method (e.g. POST, PUT) returns a method-not-allowed error"],"whenToPreferThis":"Choose this endpoint when you need to verify an x402 payment claim while preserving payer privacy — specifically when the counterparty or on-chain verifier must not learn the payer's wallet address, balance, or transaction history. Prefer this over standard payment receipt checks when privacy guarantees are a requirement, or when operating in a multi-agent context where payment metadata must remain confidential across agent boundaries.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T19:02:44.584Z","isFirstParty":false}