{"uid":"cap_hnBIKOMHeFfbRLhzQfCAn","slug":"agent-payment-cost-verification-advertised-vs-billed-price-divergence-aad22666","name":"Agent Payment Cost Verification: Advertised vs Billed Price Divergence on x402 Rails","description":"Paid agent-facing brief on agent payment cost verification: advertised versus billed price divergence on x402 rails, per-rail fee drift detection before micropayment commitment · Build a decision procedure or schema for: agent payment cost verification: advertised versus billed price divergence on x402 rails, per-rail fee drift detection before micropayment commitment. Include inputs, thresholds, failure modes. Falsifier: I-0. Blunt decision procedure, not marketing.","url":"https://k2so.wrong.systems/api/services/agent-payment-cost-verification-advertised-versu?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","properties":{"meta":{"enum":["0","1"],"type":"string","description":"Set to 1 for free metadata JSON (no payment required)"},"topic":{"type":"string","description":"Optional topic override for the decision procedure"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","title":"agent payment cost verification: advertised versus billed price diverg paid response","$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-payment-cost-verification-advertised-versu","procedure":"same as brief","generatedAt":"2026-01-01T00:00:00.000Z","generationSource":"deterministic"},"service":"agent-payment-cost-verification-advertised-versu","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_SpJUDstU7HFKoP0pU_k2B","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 for detecting and handling advertised-versus-billed price divergence and per-rail fee drift before committing to x402 micropayments","exampleAgentPrompt":"Give me the decision procedure for verifying that the price my agent is being billed on x402 rails matches what was advertised, including inputs, fee drift thresholds, and failure modes — I want to know when to abort a micropayment commitment.","exampleUseCases":[{"title":"Pre-payment price sanity check for autonomous agent","prompt":"My agent is about to commit to an x402 micropayment but I want it to first verify that the billed amount hasn't drifted from the advertised price — give me the step-by-step decision procedure with thresholds it should use before sending funds."},{"title":"Fee drift detection across multiple payment rails","prompt":"I'm routing agent payments across several x402 rails and I'm worried about per-rail fee drift inflating actual costs — what's the deterministic procedure for detecting that drift before each payment commitment?"},{"title":"Audit trail for advertised vs actual charges","prompt":"Some of our agent micropayments are coming in slightly higher than the listed price and I need a structured decision schema to flag divergences, define acceptable tolerance ranges, and specify what failure modes to watch for."}],"resultDescription":"A JSON response containing a plain-prose decision procedure (120+ words) covering inputs required for price verification, divergence thresholds, per-rail fee drift detection logic, failure modes to handle, and a recommended abort/proceed decision tree — along with metadata including model used, generation timestamp, and generation source (llm/reasoning/deterministic).","failureModes":["Payment required but not provided — returns 402 with payment instructions","Topic not found or no procedure generated — ok: false with empty brief","LLM generation failure — generationSource may fall back to deterministic stub","Rate limiting or service unavailability — HTTP 429 or 503","Malformed query parameters — schema validation error returned"],"whenToPreferThis":"Use this endpoint when an AI agent needs a concrete, non-marketing decision procedure for verifying x402 payment cost integrity before committing funds — particularly when operating across multiple rails where per-rail fees can drift. Prefer this over generic payment documentation when you need structured thresholds, explicit failure modes, and a falsifiable abort condition baked into the output.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-19T18:44:01.819Z","isFirstParty":false,"canonicalSlug":"agent-payment-cost-verification-advertised-vs-billed-price-divergence-aad22666"}