{"uid":"cap_wi82WZ3rk98N2eW20aY20","slug":"cross-rail-x402-settlement-verification-dae14b14","name":"Cross-Rail x402 Settlement Verification","description":"Paid agent-facing brief on Cross-rail x402 settlement verification for agents: verify that an agent payment actually settled on any rail (Base, Algorand, XRPL, Aztec private, Solana), using that rail's native proof format, finality semantics, and explorer/indexer lookup, normalized into one deterministic verdict (settled / pending / unverifiable / spoofed). Distinct from per-rail fee adjudication and settlement-mechanism selection: this is the post-payment verification step that assumes the","url":"https://k2so.wrong.systems/api/services/cross-rail-x402-settlement-verification-for-agen","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","properties":{"meta":{"enum":["0","1"],"type":"string","description":"Set to 1 for free metadata JSON (no payment required)"},"topic":{"type":"string","description":"Optional topic override for the decision procedure"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","title":"Cross-rail x402 settlement verification for agents: verify that an age paid response","$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":"cross-rail-x402-settlement-verification-for-agen","procedure":"same as brief","generatedAt":"2026-01-01T00:00:00.000Z","generationSource":"deterministic"},"service":"cross-rail-x402-settlement-verification-for-agen","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_JCc8WVxv2ikNB7OhYfugB","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":"Returns a deterministic verdict (settled/pending/unverifiable/spoofed) confirming whether an agent payment actually settled on any of five supported blockchain rails (Base, Algorand, XRPL, Aztec private, Solana).","exampleAgentPrompt":"Can you verify whether the x402 payment my agent just sent on Solana actually settled — I need a normalized verdict telling me if it's confirmed, pending, spoofed, or unverifiable before I release the service?","exampleUseCases":[{"title":"Post-payment check before releasing digital goods","prompt":"Before I unlock access to the paid content, verify that the x402 payment my agent submitted on Base actually settled — give me a clear settled or pending verdict using the native proof."},{"title":"Spoofed payment detection for an agent marketplace","prompt":"An agent just claimed to have paid via XRPL, but something looks off — can you run a cross-rail settlement check on that transaction to tell me if it's legitimate, spoofed, or unverifiable?"},{"title":"Multi-rail finality confirmation for autonomous agent workflow","prompt":"My autonomous agent completed a payment on Algorand as part of a pipeline — verify that it reached finality using Algorand's native proof format and return the normalized verdict so the next workflow step can proceed."}],"resultDescription":"A structured JSON response containing a deterministic settlement verdict (settled, pending, unverifiable, or spoofed), a decision procedure prose brief for agents, the model and generation source used (llm/reasoning/deterministic), an ISO-8601 timestamp, and payment metadata including payer address and transaction ID.","failureModes":["Payment transaction not yet indexed by rail's explorer — returns 'pending' verdict","Transaction ID or proof format invalid for the specified rail — returns 'unverifiable'","Rail indexer/explorer unreachable or rate-limited — may return unverifiable or service error","Proof format mismatch between claimed rail and submitted proof — returns 'spoofed' or 'unverifiable'","Missing or malformed required query parameters — returns validation error","Payment not made (free metadata returned instead) — returns unpaid 402 response"],"whenToPreferThis":"Use this endpoint when an agent needs post-payment confirmation that an x402 transaction actually settled on any of the five supported rails (Base, Algorand, XRPL, Aztec private, Solana) before releasing a service or advancing a workflow. Prefer this over per-rail tools when you need a single normalized verdict across rails without implementing rail-specific proof parsing. This is the post-payment verification step, not fee estimation or rail selection — use it after payment is submitted, not before.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T20:27:28.734Z","isFirstParty":false}