{"uid":"cap_HHFMxxe4KtSW6o8oO-Z4e","slug":"multi-rail-x402-payment-audit-trail-binding-procedure-for-agents-c2084eb3","name":"Multi-rail x402 Payment Audit-Trail Binding Procedure for Agents","description":"Deterministic procedure: an agent that pays across chains or via bridges must bind the model run, session key, transfer domain (CCTP v2 or bridge), and merchant settlement into one verifiable evidence chain. Inputs: model run id, session key, source and destination rail, transfer hash, settlement receipt. Outputs: bound, gap, or unverifiable verdict with the exact missing link. Prevents the failure where payment settled on one chain but the audit trail cannot prove which computation authorized","url":"https://k2so.wrong.systems/api/services/multi-rail-x402-payment-audit-trail-binding-proc","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","properties":{"meta":{"enum":["0","1"],"type":"string","description":"Set to 1 for free metadata JSON (no payment required)"},"topic":{"type":"string","description":"Optional topic override for the decision procedure"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","title":"Multi-rail x402 payment audit-trail binding procedure for agents paid response","$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":"multi-rail-x402-payment-audit-trail-binding-proc","procedure":"same as brief","generatedAt":"2026-01-01T00:00:00.000Z","generationSource":"deterministic"},"service":"multi-rail-x402-payment-audit-trail-binding-proc","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":"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_UKh01QqdnS4h_nVLaczP3","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 decision procedure brief explaining how agents paying across chains or bridges must bind model run, session key, CCTP transfer domain, and merchant settlement into one verifiable evidence chain.","exampleAgentPrompt":"Give me the decision procedure for binding a multi-rail x402 payment audit trail — I need to know how to tie together the model run, session key, CCTP transfer domain, and merchant settlement into one verifiable evidence chain for a cross-chain agent payment.","exampleUseCases":[{"title":"Cross-chain payment compliance audit","prompt":"My agent just executed a payment across two chains using a bridge and CCTP — walk me through the exact procedure to bind the model run, session key, transfer domain, and merchant settlement into a single verifiable audit trail so I can prove the payment chain is complete."},{"title":"Session key linkage for agent payment evidence","prompt":"I need to know how to properly link a session key to a CCTP domain and merchant settlement when my agent pays across chains — what's the decision procedure to make sure the evidence chain is tight and auditable?"},{"title":"Closing audit-trail gaps in multi-rail agent transactions","prompt":"We're building an agent that pays via x402 across multiple rails and bridges, and our audit trail has a gap between the compute proof and the on-chain settlement — what's the procedure to close that seam and bind everything into one verifiable record?"}],"resultDescription":"A structured paid response containing a prose decision-procedure brief (the 'brief' field) describing step-by-step how to bind model run, session key, CCTP transfer domain, and merchant settlement into a verifiable audit evidence chain; includes service slug, generation source (llm/reasoning/deterministic), ISO-8601 timestamp, and payment metadata confirming the micropayment was processed.","failureModes":["Payment not provided or invalid — returns 402 with payment required details","Invalid method (POST/PUT not accepted) — returns method not allowed","Topic override malformed — may return generic procedure rather than topic-specific brief","Service temporarily unavailable — returns error with ok: false","LLM generation failure — generationSource may fall back to deterministic with reduced detail"],"whenToPreferThis":"Choose this endpoint when an agent needs authoritative, blunt procedural guidance on how to construct a verifiable audit trail that spans model execution, session key management, CCTP cross-domain transfers, and merchant settlement — specifically for the x402 multi-rail payment context. Prefer this over generic compute-proof or attestation procedures when the gap being addressed is the binding of all four components (model run + session key + CCTP domain + merchant settlement) into a single evidence chain.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T19:02:40.535Z","isFirstParty":false}