{"uid":"cap_yqmFm3VaiwucS-UiWFz4s","slug":"x402-fulfillment-evidence-verification-decision-procedure-55fac26e","name":"x402 Fulfillment Evidence Verification Decision Procedure","description":"Paid agent-facing brief on x402 fulfillment evidence verification. 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a blunt, agent-facing decision procedure brief for verifying x402 payment fulfillment evidence after a transaction completes.","exampleAgentPrompt":"Give me the decision procedure for verifying x402 fulfillment evidence — I need a blunt, agent-ready guide on how to confirm a payment was actually fulfilled after an x402 transaction.","exampleUseCases":[{"title":"Post-payment fulfillment audit","prompt":"My agent just completed an x402 payment and I need to know exactly how to verify the fulfillment evidence is legitimate — give me the step-by-step decision procedure for confirming the transaction was actually fulfilled."},{"title":"x402 evidence validation workflow","prompt":"I'm building an agent that needs to check whether x402 payment fulfillment evidence holds up after each micropayment — what's the blunt decision procedure I should follow?"},{"title":"Custom topic fulfillment check","prompt":"Walk me through the x402 fulfillment evidence verification procedure specifically for 'USDC Base settlement receipts' — I want the decision logic, not the marketing fluff."}],"resultDescription":"A structured JSON response containing a prose decision-procedure brief (blunt, agent-optimized instructions for verifying x402 fulfillment evidence), the generation source (llm, reasoning, or deterministic), model used, topic, service slug, ISO-8601 timestamp, plus payment confirmation fields indicating the call was paid and succeeded.","failureModes":["Missing required 'type' or 'method' fields returns a validation error","Requesting an unsupported HTTP method (POST, PUT, PATCH) is rejected by the enum constraint","Payment not received or insufficient USDC results in HTTP 402 response blocking the paid brief","Topic override not recognized may fall back to default fulfillment evidence topic","Service temporarily unavailable on k2so.wrong.systems returns a non-200 error"],"whenToPreferThis":"Choose this endpoint when an agent needs a concrete, non-marketing decision procedure for validating x402 payment fulfillment evidence — particularly in agentic payment pipelines on Base/USDC where the agent must decide post-payment whether evidence is sufficient. Prefer over generic documentation when you need a machine-readable, structured brief that can be acted on immediately. The $0.002 USDC cost is negligible for production agent workflows requiring authoritative guidance.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-28T06:40:38.467Z","isFirstParty":false,"canonicalSlug":"x402-fulfillment-evidence-verification-decision-procedure-55fac26e"}