{"uid":"cap_4KPCqk6ee73Hjx6UDgsvw","slug":"agent-first-purchase-merchant-trust-gate-deterministic-decision-d48af4d7","name":"Agent First-Purchase Merchant Trust Gate — Deterministic Decision Procedure","description":"Paid agent-facing brief on agent first-purchase merchant trust gate: deterministic procedure an agent runs before its first-ever x402 payment to an unfamiliar merchant, verifying contract completeness, disclosure honesty, refund/dispute path, identity anchor, with kill criteria and a single verdict. Blunt decision procedure, not marketing.","url":"https://k2so.wrong.systems/api/services/agent-first-purchase-merchant-trust-gate-determi","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","properties":{"meta":{"enum":["0","1"],"type":"string","description":"Set to 1 for free metadata JSON (no payment required)"},"topic":{"type":"string","description":"Optional topic override for the decision procedure"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","title":"agent first-purchase merchant trust gate: deterministic procedure an a paid response","$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":null,"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_ncAC324WD9Lysa1XFJ_sl","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 (plain-prose brief) an AI agent should follow when deciding whether to trust a merchant it has never purchased from before via x402.","exampleAgentPrompt":"I need a decision procedure I can follow right now to decide whether to trust a new x402 merchant I've never bought from before — give me the deterministic trust gate so I know exactly what to check before sending USDC to them.","exampleUseCases":[{"title":"Vetting an unknown x402 API provider","prompt":"My agent is about to pay a brand-new x402 merchant for the first time and I want a step-by-step decision procedure it can follow to decide whether that first purchase is safe — can you run the merchant trust gate and return the full procedure?"},{"title":"Building a first-purchase approval policy","prompt":"I'm coding an autonomous agent that buys x402 services and I want to hard-code a trust gate so it never just blindly pays a merchant it hasn't dealt with before — fetch me the deterministic first-purchase trust procedure so I can wire it into the agent's approval flow."},{"title":"Auditing agent spending guardrails","prompt":"I need to review the decision logic my agent should apply before making a first-ever purchase from any x402 provider — pull the agent first-purchase merchant trust gate procedure so I can check whether my current guardrails match the recommended steps."}],"resultDescription":"A JSON object containing a plain-prose decision procedure (120+ words) under the `brief` and `procedure` fields, along with metadata: the topic, the service slug, the model used to generate it (e.g. deepseek-v4-flash), an ISO-8601 generatedAt timestamp, and a generationSource enum value (deterministic/llm/reasoning). The top-level response also confirms `ok: true`, `paid: true`, provider `K-2SO`, and the service identifier.","failureModes":["HTTP 402 returned if USDC payment is not settled before retry — agent must pay exact amount and include PAYMENT-SIGNATURE header","Invalid or missing `method` or `type` fields in input cause schema validation error","Network timeout if Base/USDC settlement is slow","Stale or cached procedure if the agent calls with a topic that maps to a pre-generated deterministic result","Unknown topic override may yield a generic fallback procedure"],"whenToPreferThis":"Choose this endpoint when an AI agent needs a portable, on-demand, machine-readable decision procedure specifically for evaluating first-time x402 merchant trust — especially when the agent has no prior purchase history with that merchant. Prefer it over manual policy lookups or hardcoded logic when you want a text procedure that can be injected directly into an agent's reasoning context before authorizing USDC payment.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T18:54:36.146Z","isFirstParty":false}