{"uid":"cap_eKWrac_xKNvRVQ2uQH-aC","slug":"estimate-first-pre-payment-discipline-for-agents-c4337de8","name":"Estimate-First Pre-Payment Discipline for Agents","description":"Decision procedure for verifying an x402/MPP challenge's quoted price, network, expiry, and terms BEFORE paying: parse the 402 challenge, confirm the quote matches the agent's budget and wallet fit, detect price surprises and hidden fees, then pay or refuse with evidence. Eliminates the settlement-failure class where agents pay without checking the price first.","url":"https://k2so.wrong.systems/api/services/estimate-first-pre-payment-discipline-for-agents","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","properties":{"meta":{"enum":["0","1"],"type":"string","description":"Set to 1 for free metadata JSON (no payment required)"},"topic":{"type":"string","description":"Optional topic override for the decision procedure"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","title":"estimate-first pre-payment discipline for agents paid response","$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":"estimate-first-pre-payment-discipline-for-agents","procedure":"same as brief","generatedAt":"2026-01-01T00:00:00.000Z","generationSource":"deterministic"},"service":"estimate-first-pre-payment-discipline-for-agents","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_R7jLvcHqdq8v-S0AYpSwY","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":"Provides a decision procedure for AI agents to verify an x402/MPP payment challenge's price, network, expiry, and terms before paying, preventing overpayment and settlement failures.","exampleAgentPrompt":"Before I pay this x402 payment challenge, check whether the quoted price, network, and expiry terms are within my budget and look legitimate — flag any price surprises or hidden fees and tell me whether to pay or refuse.","exampleUseCases":[{"title":"Budget guard before agent micropayment","prompt":"I have an x402 payment challenge from an API I want to call — it's asking for 0.005 USDC on Base — can you verify the price, network, and expiry are all legitimate and within my $0.01 per-call budget before I approve the payment?"},{"title":"Hidden fee detection on third-party service","prompt":"This x402 invoice from a third-party data provider looks higher than what was advertised — run the pre-payment check and tell me if there are any hidden fees or price surprises I should know about before my agent settles."},{"title":"Automated refusal with audit trail","prompt":"My agent is about to pay an x402 challenge but I want it to always verify the terms first — run the estimate-first discipline check and if anything looks off, refuse the payment and give me the evidence so I can audit what happened."}],"resultDescription":"Returns a structured decision procedure brief including: a go/no-go recommendation, prose explaining the reasoning, detection of price surprises or hidden fees, network and expiry validation status, the service slug, generation timestamp, and source (llm/reasoning/deterministic). Also includes payment metadata confirming whether the call itself was paid.","failureModes":["Missing or malformed x402 challenge input returns a handler error with ok:false","Challenge expiry already elapsed results in a refusal with expiry evidence","Network mismatch between challenge and agent wallet causes a validation failure","Price exceeds configured budget triggers a refuse decision with price comparison detail","Service temporarily unavailable returns a non-200 with no result body"],"whenToPreferThis":"Choose this endpoint when your agent needs a deterministic, evidence-backed pre-payment gate before settling any x402/MPP challenge — especially when operating autonomously with a fixed budget or when integrating with third-party services where price surprises or hidden fees are a risk. Prefer this over ad-hoc budget checks when you need a structured audit trail for refusals or when compliance with a pre-payment discipline policy is required.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T13:28:21.032Z","isFirstParty":false}