{"uid":"cap_GlWPle1f6fmwBMsH7HEl3","slug":"post-quantum-signature-verification-for-agent-payment-settlement-4f433daf","name":"Post-Quantum Signature Verification for Agent Payment Settlement Evidence","description":"Paid agent-facing brief on post-quantum signature verification for agent payment settlement evidence on x402/MPP rails (verify ML-DSA/SLH-DSA and hybrid X.509 signed settlement receipts, rejection thresholds, fallback to classical schemes) · Build a decision procedure or schema for: post-quantum signature verification for agent payment settlement evidence on x402/MPP rails (verify ML-DSA/SLH-DSA and hybrid X.509 signed sett-0. Blunt decision procedure, not marketing.","url":"https://k2so.wrong.systems/api/services/post-quantum-signature-verification-for-agent-pa?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","properties":{"meta":{"enum":["0","1"],"type":"string","description":"Set to 1 for free metadata JSON (no payment required)"},"topic":{"type":"string","description":"Optional topic override for the decision procedure"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","title":"post-quantum signature verification for agent payment settlement evide paid response","$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":"post-quantum-signature-verification-for-agent-pa","procedure":"same as brief","generatedAt":"2026-01-01T00:00:00.000Z","generationSource":"deterministic"},"service":"post-quantum-signature-verification-for-agent-pa","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_stzTsFiS_CAeMFZfRS6Hx","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 paid, LLM-generated decision procedure for verifying ML-DSA/SLH-DSA and hybrid X.509 post-quantum signatures on x402/MPP settlement receipts, including rejection thresholds and classical fallback logic.","exampleAgentPrompt":"Give me the decision procedure for verifying post-quantum signatures on x402 and MPP settlement receipts — specifically how to handle ML-DSA and SLH-DSA signed receipts, what rejection thresholds to apply, and when to fall back to classical schemes.","exampleUseCases":[{"title":"Validating ML-DSA settlement receipts at runtime","prompt":"My agent just received a payment settlement receipt claiming to be ML-DSA signed on an x402 rail — what's the step-by-step procedure to verify it's legitimate, and at what point should I reject it?"},{"title":"Hybrid X.509 certificate verification for agent payments","prompt":"I need a blunt decision procedure for checking hybrid X.509 post-quantum certificates attached to MPP settlement evidence — tell me exactly what to validate and what constitutes a failure."},{"title":"Fallback logic when post-quantum verification fails","prompt":"What's the correct procedure for an autonomous agent to fall back to classical signature verification when SLH-DSA or ML-DSA verification fails on an x402 payment receipt?"}],"resultDescription":"A JSON object containing a plain-prose decision procedure (120+ words) covering ML-DSA/SLH-DSA verification steps, hybrid X.509 handling, rejection thresholds, and classical fallback logic for agent payment settlement evidence on x402/MPP rails. Also includes metadata: model name, generation source (llm/reasoning/deterministic), ISO-8601 timestamp, and service slug.","failureModes":["Payment not completed — endpoint returns unpaid/gated response without procedure content","Invalid or missing input parameters result in schema validation error","LLM generation failure may fall back to deterministic procedure source","Topic override may produce off-scope or generic output if not well-specified","Network or upstream provider downtime returns HTTP error"],"whenToPreferThis":"Choose this endpoint when an autonomous agent needs a concrete, actionable decision procedure — not marketing — for verifying post-quantum (ML-DSA, SLH-DSA) and hybrid X.509 signatures on x402 or MPP payment settlement receipts. It is purpose-built for the agent payment context and produces a blunt, structured procedure rather than general cryptographic documentation. Prefer it over general-purpose LLM queries when you need rail-specific rejection thresholds and fallback logic in a single paid call.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-18T12:47:41.353Z","isFirstParty":false,"canonicalSlug":"post-quantum-signature-verification-for-agent-payment-settlement-4f433daf"}