{"uid":"cap_k0Bbs7T7zW3EfIqK_ICm0","slug":"http-402-payment-challenge-negotiation-merchant-contract-quality-761e6e5b","name":"HTTP 402 Payment Challenge Negotiation & Merchant Contract Quality Decision Procedure","description":"Paid agent-facing brief on agent-facing HTTP 402 payment challenge negotiation and merchant contract quality procedure · Build a decision procedure or schema for: agent-facing HTTP 402 payment challenge negotiation and merchant contract quality procedure. Include inputs, thresholds, failure modes. Falsifier: If free docs already solve the decision, paid product fails.-0. Blunt decision procedure, not marketing.","url":"https://k2so-8080.on.ascii.dev/api/services/agent-facing-http-402-payment-challenge-negotiat?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","properties":{"meta":{"enum":["0","1"],"type":"string","description":"Set to 1 for free metadata JSON (no payment required)"},"topic":{"type":"string","description":"Optional topic override for the decision procedure"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","title":"agent-facing HTTP 402 payment challenge negotiation and merchant contr paid response","$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_HGaIl8U-HeHULD-sqe1AW","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 for agents handling HTTP 402 payment challenge negotiation and merchant contract quality evaluation","exampleAgentPrompt":"Give me a clear decision procedure for handling an HTTP 402 payment challenge — what inputs should I check, what thresholds matter, and what failure modes should disqualify a merchant contract before my agent pays?","exampleUseCases":[{"title":"Agent x402 payment gating before execution","prompt":"Before my trading agent pays any x402 service, I need a concrete decision procedure: what fields in the 402 challenge should I validate, what dollar thresholds should trigger a reject, and what merchant contract red flags mean I should never pay?"},{"title":"Merchant contract quality audit for a marketplace","prompt":"I'm building a marketplace that lists x402 services — give me a pass/fail decision schema for evaluating whether a merchant's contract terms meet quality standards before I let agents transact with them."},{"title":"Debugging a failed agent payment negotiation","prompt":"My agent hit a 402 and tried to negotiate payment but the transaction failed — walk me through the decision procedure I should have followed, including the failure modes that could have caused this outcome."}],"resultDescription":"A structured JSON response containing a prose decision procedure ('brief') with explicit inputs, thresholds, and failure modes for HTTP 402 payment challenge negotiation and merchant contract quality evaluation, along with metadata including the generation source (llm/reasoning/deterministic), topic, service slug, and ISO-8601 timestamp of generation.","failureModes":["Payment not completed — returns 402 challenge instead of paid response","Handler failure — ok:false in result object with no brief returned","LLM generation failure — generationSource missing or procedure field empty","Topic override not recognized — generic fallback procedure returned instead of topic-specific one","Free metadata mode (meta=1) returns schema only, not the full decision procedure"],"whenToPreferThis":"Choose this endpoint when an autonomous agent needs a structured, authoritative decision procedure for handling x402 HTTP 402 payment challenges — especially when free documentation doesn't provide actionable thresholds, failure modes, or merchant contract quality criteria. Prefer this over generic x402 docs when you need a machine-consumable schema with explicit pass/fail logic rather than narrative explanations.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-18T12:50:24.841Z","isFirstParty":false,"canonicalSlug":"http-402-payment-challenge-negotiation-merchant-contract-quality-761e6e5b"}