{"uid":"cap_2i8UIr6Fs2ullQ-WfzWFJ","slug":"runtime-payment-failure-behavior-for-agents-knock-or-backoff-decision-ee0b8f92","name":"Runtime Payment-Failure Behavior for Agents: Knock-or-Backoff Decision Procedure","description":"Paid agent-facing brief on runtime payment-failure behavior for agents: knock-or-backoff for no-quote and broken-quote x402 endpoints, retry budgets, backoff timing, alternate merchant fallback when challenge is malformed or settlement RPC fails · Build a decision procedure or schema for: runtime payment-failure behavior for agents: knock-or-backoff for no-quote and broken-quote x402 endpoints, retry budgets, backoff timing-0. Blunt decision procedure, not marketing.","url":"https://k2so.wrong.systems/api/services/runtime-payment-failure-behavior-for-agents-knoc?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","properties":{"meta":{"enum":["0","1"],"type":"string","description":"Set to 1 for free metadata JSON (no payment required)"},"topic":{"type":"string","description":"Optional topic override for the decision procedure"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","title":"runtime payment-failure behavior for agents: knock-or-backoff for no-q paid response","$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":"runtime-payment-failure-behavior-for-agents-knoc","procedure":"same as brief","generatedAt":"2026-01-01T00:00:00.000Z","generationSource":"deterministic"},"service":"runtime-payment-failure-behavior-for-agents-knoc","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":"down","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_9GbzG-oMgljWadYnsKAGF","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 brief describing how an autonomous agent should behave when a no-queue x402 paid API response fails at runtime — whether to knock again or back off.","exampleAgentPrompt":"What's the decision procedure for handling runtime payment failures in x402 — specifically whether to knock again or back off when I get no response after paying?","exampleUseCases":[{"title":"Agent retry logic after payment silence","prompt":"My autonomous agent just paid USDC via x402 and got no response — should it knock again or back off? Give me the decision procedure for handling that kind of runtime payment failure."},{"title":"Building fault-tolerant x402 agent merchant","prompt":"I'm building an agent that calls paid x402 APIs and I need a clear procedure for what it should do when a payment goes through but the response never comes — knock-or-backoff style guidance please."},{"title":"Debugging stalled micropayment in agent workflow","prompt":"My agent pipeline stalled after an x402 micropayment: payment settled on-chain but the API returned nothing. Walk me through the runtime decision procedure for whether to retry or abandon that call."}],"resultDescription":"A JSON object containing a plain-prose decision procedure brief (120+ words) advising an agent on knock-or-backoff behavior for no-queue paid x402 response failures. Includes the generating model name, topic, service slug, ISO-8601 generation timestamp, generation source (llm/reasoning/deterministic), and payment metadata confirming USDC settlement on Base.","failureModes":["HTTP 402 returned if USDC payment not settled before retry — must pay exact amount and include PAYMENT-SIGNATURE header","Invalid method (POST, PUT, PATCH) rejected — only GET/HEAD/DELETE supported","Missing required 'input' object in request body causes validation error","Payment signature mismatch or expired signature causes rejection","Network unavailability of k2so.wrong.systems returns connection error","Meta=1 query param returns free metadata JSON without triggering payment flow"],"whenToPreferThis":"Choose this endpoint when an autonomous agent needs authoritative, LLM-generated procedural guidance specifically about x402 runtime payment-failure behavior — particularly the knock-or-backoff decision for no-queue paid responses. Prefer this over generic retry-logic documentation when operating within the x402 micropayment ecosystem on Base, where the cost ($0.002 USDC) is trivial and the output is tailored to agentic decision-making rather than human developers.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-30T08:27:13.544Z","isFirstParty":false,"canonicalSlug":"runtime-payment-failure-behavior-for-agents-knock-or-backoff-decision-ee0b8f92"}