{"uid":"cap_rtLxJCtNHf9rWrSwbHvuB","slug":"agent-retail-checkout-purchase-authorization-decision-procedure-1909f78d","name":"Agent Retail Checkout Purchase Authorization Decision Procedure","description":"Deterministic gate for an agent authorized to buy goods or services at x402 retail checkouts (gift cards, eSIMs, prepaid top-ups, table bookings, physical pickup items). Ordered checks: verify what is actually being purchased by parsing the checkout payload and comparing against the task's purchase intent, category allowlist from the principal with non-refundable and regulated categories flagged, price against 20% of task value plus checkout fee and rail fee, delivery verification before","url":"https://k2so.wrong.systems/api/services/agent-retail-checkout-purchase-authorization-p?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","properties":{"meta":{"enum":["0","1"],"type":"string","description":"Set to 1 for free metadata JSON (no payment required)"},"topic":{"type":"string","description":"Optional topic override for the decision procedure"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","title":"Agent retail checkout purchase authorization procedure paid response","$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":"agent-retail-checkout-purchase-authorization-p","procedure":"same as brief","generatedAt":"2026-01-01T00:00:00.000Z","generationSource":"deterministic"},"service":"agent-retail-checkout-purchase-authorization-p","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_zqIXIQJ0cuE_Z2ROdgjfo","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 plain-prose decision procedure brief guiding an AI agent through retail checkout purchase authorization logic, delivered via x402 micropayment on Base.","exampleAgentPrompt":"I need a decision procedure brief explaining how an autonomous agent should handle retail checkout purchase authorization — what checks to run, when to approve or deny, and what edge cases to watch for.","exampleUseCases":[{"title":"E-commerce agent purchase gate","prompt":"My shopping agent needs a clear decision procedure for authorizing retail checkout purchases — walk it through what to verify before approving a transaction and when to block one."},{"title":"Autonomous merchant fraud check policy","prompt":"Can you get me a decision brief on how an agent should evaluate a retail purchase authorization request, especially for detecting potentially fraudulent or out-of-policy orders?"},{"title":"Custom topic purchase authorization brief","prompt":"Fetch a decision procedure brief for an agent handling purchase authorization specifically for subscription retail checkout — I want the topic scoped to recurring billing scenarios."}],"resultDescription":"A JSON object containing a plain-prose decision procedure (120+ words) under `result.brief`, the service slug, generation timestamp, model used, generation source (llm/reasoning/deterministic), and payment confirmation fields including payer address and transaction hash.","failureModes":["HTTP 402 returned if payment has not been settled — agent must pay exact USDC and retry with PAYMENT-SIGNATURE header","Invalid or missing `method` enum value causes schema validation failure","Malformed `input` object returns a 400-level error","Network or provider downtime on Base may delay or reject payment settlement","Topic override producing an out-of-scope query may return a generic or low-quality brief"],"whenToPreferThis":"Choose this endpoint when an autonomous agent needs on-demand, LLM-generated policy guidance specifically for retail checkout purchase authorization decisions. It is ideal for agents operating in e-commerce or merchant contexts that require a structured, prose decision framework rather than a hardcoded rule set, and where x402 micropayment infrastructure on Base is already in use. Prefer it over static rule engines when the agent needs adaptable, natural-language decision logic it can reason over at call time.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-20T12:41:32.796Z","isFirstParty":false,"canonicalSlug":"agent-retail-checkout-purchase-authorization-decision-procedure-1909f78d"}