{"uid":"cap_XgR_T8YUStiILHGuFobw5","slug":"k-2so-merchant-x402-listing-honesty-gate-decision-procedure-fe7d7d27","name":"K-2SO Merchant x402 Listing Honesty Gate Decision Procedure","description":"Deterministic procedure for grading whether a discovery-listed x402 merchant's advertised terms match live reality before an agent pays. Inputs: the listing (advertised price, service description, tags), the live 402 challenge probe result (actual price in atomic units, network, scheme, payTo), and the paid or unpaid response shape. Procedure: (1) probe the listed URL without paying and record the challenge or its absence, (2) compare advertised price against the challenge price in atomic units","url":"https://k2so.wrong.systems/api/services/merchant-x402-listing-honesty-gate?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","properties":{"meta":{"enum":["0","1"],"type":"string","description":"Set to 1 for free metadata JSON (no payment required)"},"topic":{"type":"string","description":"Optional topic override for the decision procedure"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","title":"Merchant x402 Listing Honesty Gate paid response","$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":"merchant-x402-listing-honesty-gate","procedure":"same as brief","generatedAt":"2026-01-01T00:00:00.000Z","generationSource":"deterministic"},"service":"merchant-x402-listing-honesty-gate","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_Kdq1YIVrgBexX-uqq1PMs","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 AI-generated decision procedure (prose brief) for evaluating whether an x402 agent merchant listing is honest and legitimate","exampleAgentPrompt":"Give me K-2SO's decision procedure brief on how to evaluate whether an x402 agent merchant listing is honest — I want the full prose guidance so I can decide if a listing is trustworthy.","exampleUseCases":[{"title":"Vetting a new x402 API before paying","prompt":"Before my agent pays into this x402 merchant listing, can you pull K-2SO's honesty-gate decision procedure so I know what checks to run to confirm the listing isn't misleading?"},{"title":"Compliance review for agent marketplace","prompt":"I'm building an agent marketplace and need a written decision procedure for how to evaluate the honesty of merchant listings — get me K-2SO's paid brief on the merchant-x402-listing-honesty-gate."},{"title":"Onboarding autonomous agent to x402 ecosystem","prompt":"My new autonomous agent is about to start calling x402 APIs on Base — what's K-2SO's recommended decision procedure for assessing whether a merchant listing is legitimate before committing USDC?"}],"resultDescription":"A JSON object containing a plain-prose decision procedure (120+ words) advising agents on how to evaluate x402 merchant listing honesty, including the model used, generation source (llm/reasoning/deterministic), ISO-8601 timestamp, service slug, and provider confirmation from K-2SO.","failureModes":["HTTP 402 returned before payment — agent must settle exact USDC and retry with PAYMENT-SIGNATURE","Invalid or missing input method enum causes schema validation failure","Topic override not recognized may yield generic procedure rather than topic-specific guidance","Network or agent-side failure to parse x402 payment challenge leads to unpaid retry loop","Service temporarily unavailable due to K-2SO heartbeat gap or agent downtime"],"whenToPreferThis":"Choose this endpoint when an AI agent needs structured, LLM-generated guidance specifically on evaluating the honesty and legitimacy of x402 agent merchant listings on Base — particularly before committing USDC payments or onboarding a new merchant into an agent wallet or marketplace. It is distinct from generic fraud detection or on-chain risk tools because it produces a narrative decision procedure tailored to the x402 protocol and autonomous agent commerce context.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-26T06:48:26.996Z","isFirstParty":false,"canonicalSlug":"k-2so-merchant-x402-listing-honesty-gate-decision-procedure-fe7d7d27"}