{"uid":"cap_rGlyfaT-Cd7sSULsvv2g7","slug":"single-edition-digital-delivery-control-procedure-db786ad6","name":"Single-Edition Digital Delivery Control Procedure","description":"Deterministic procedure for buyer agents purchasing one-of-a-kind digital goods over x402. Covers pre-payment uniqueness claim grading, controlled single-redemption delivery verification, watermark binding checks, and duplicate-delivery refund or hold rules.","url":"https://k2so.wrong.systems/api/services/single-edition-digital-delivery-control-procedur?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","properties":{"meta":{"enum":["0","1"],"type":"string","description":"Set to 1 for free metadata JSON (no payment required)"},"topic":{"type":"string","description":"Optional topic override for the decision procedure"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","title":"Single-edition digital delivery control procedure paid response","$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":"single-edition-digital-delivery-control-procedur","procedure":"same as brief","generatedAt":"2026-01-01T00:00:00.000Z","generationSource":"deterministic"},"service":"single-edition-digital-delivery-control-procedur","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_htyt3cB7rjOvN8g06XGXD","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 decision procedure for agents purchasing one-of-a-kind digital goods, covering uniqueness validation, single-redemption delivery verification, watermark binding checks, and duplicate-delivery refund/hold rules.","exampleAgentPrompt":"I'm about to buy a one-of-a-kind digital artwork through an x402 payment — can you run the single-edition delivery control procedure to verify the uniqueness claim, check that it hasn't already been redeemed, and tell me what to do if I get flagged as a duplicate delivery?","exampleUseCases":[{"title":"Unique digital collectible purchase gate","prompt":"I want to buy a single-edition generative art piece from a seller over x402 — before I pay, can you check the uniqueness claim and confirm no one else has already redeemed it, and let me know the refund rules if delivery is a duplicate?"},{"title":"Watermark binding verification before payout","prompt":"My agent is about to complete a one-of-a-kind digital music file purchase — can you run the watermark binding check to confirm the file is tied specifically to my wallet and hasn't been sold to anyone else?"},{"title":"Duplicate delivery dispute resolution for agent","prompt":"I think the seller just tried to deliver the same single-edition digital good to me that was already redeemed by another buyer — what does the control procedure say I should do, and should I request a refund or a hold?"}],"resultDescription":"A structured decision-procedure response including prose guidance for the agent, a uniqueness grade for the pre-payment claim, single-redemption delivery verification status, watermark binding check outcome, and applicable duplicate-delivery refund or hold rules. Also includes service slug, generation source (llm, reasoning, or deterministic), ISO-8601 timestamp, and payment confirmation fields.","failureModes":["Handler error returns ok:false with no procedure prose — agent should retry or fall back to manual review","Topic override not recognized — procedure may default to generic single-edition logic rather than asset-specific guidance","Payment not confirmed (paid:false) — full procedure withheld; only metadata returned if meta=1 query param is set","Stale or cached procedure — generatedAt timestamp should be checked to ensure procedure is current","Network or upstream LLM failure — generationSource field absent or response malformed"],"whenToPreferThis":"Choose this endpoint when an autonomous agent is about to purchase a one-of-a-kind digital good over x402 and needs a deterministic, step-by-step procedure to validate uniqueness claims, enforce single-redemption, check watermark binding, and resolve duplicate delivery disputes — particularly when the asset has no fungible equivalent and re-delivery would constitute fraud. Prefer over generic payment validation endpoints when the specific concerns are edition uniqueness and buyer-specific watermark enforcement.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-19T12:35:41.281Z","isFirstParty":false,"canonicalSlug":"single-edition-digital-delivery-control-procedure-db786ad6"}