{"uid":"cap_mEisXQ95a0mt27woj3NAr","slug":"agent-message-delivery-attestation-standard-verify-paid-message-was-ddab2eca","name":"Agent Message-Delivery Attestation Standard: Verify Paid Message Was Delivered","description":"Paid agent-facing brief on agent message-delivery attestation standard: verify a paid message was actually delivered before treating the sender as paid-0. Blunt decision procedure, not marketing.","url":"https://k2so.wrong.systems/api/services/agent-message-delivery-attestation-standard-veri?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","properties":{"meta":{"enum":["0","1"],"type":"string","description":"Set to 1 for free metadata JSON (no payment required)"},"topic":{"type":"string","description":"Optional topic override for the decision procedure"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","title":"agent message-delivery attestation standard: verify a paid message was paid response","$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-message-delivery-attestation-standard-veri","procedure":"same as brief","generatedAt":"2026-01-01T00:00:00.000Z","generationSource":"deterministic"},"service":"agent-message-delivery-attestation-standard-veri","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_ru_baLJ6HlCOTJzvvMARb","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 blunt, procedural decision brief for agents on how to verify that a paid message was actually delivered before treating the sender as having paid","exampleAgentPrompt":"Can you pull the blunt decision procedure for verifying that a paid message was actually delivered before I credit the sender as having paid — I need the attestation standard for agent message delivery?","exampleUseCases":[{"title":"Pre-credit sender delivery check","prompt":"Before I mark that agent as having successfully paid and delivered their message, can you fetch the decision procedure I should follow to verify the message was actually delivered — I don't want to credit them if delivery never happened?"},{"title":"Onboarding agent to x402 messaging","prompt":"I'm building an agent that sends paid messages over x402 and I need to know the correct attestation steps for confirming delivery before treating a transaction as complete — can you get me that standard procedure?"},{"title":"Auditing disputed message delivery","prompt":"One of our agents is claiming it sent a paid message but the recipient says it never arrived — can you retrieve the attestation decision procedure so I know exactly how to verify whether delivery actually occurred?"}],"resultDescription":"A JSON response containing a plain-prose decision procedure (120+ words) describing the blunt steps an agent should take to verify a paid message was actually delivered, along with the topic, service slug, generation source (llm, reasoning, or deterministic), model used, and an ISO-8601 timestamp of generation.","failureModes":["Payment not included or invalid: returns 402 with payment required details","Invalid method (POST, PUT, etc.): only GET/HEAD/DELETE accepted","Service unavailable: provider K-2SO backend offline or unreachable","Malformed query parameters: topic or meta params with unexpected values may return errors","Empty or missing brief in result: LLM generation failure may yield incomplete procedure text"],"whenToPreferThis":"Choose this endpoint when an agent needs a structured, authoritative decision procedure specifically for verifying that a paid x402 message was actually delivered to its recipient before crediting the sender. It is purpose-built for the agent message-delivery attestation use case on the x402 payment rail, distinct from general payment settlement or cross-ledger verification endpoints on the same host. Prefer it over broader payment verification endpoints when the specific concern is message delivery confirmation rather than fund settlement.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T19:25:48.936Z","isFirstParty":false,"canonicalSlug":"agent-message-delivery-attestation-standard-verify-paid-message-was-ddab2eca"}