{"uid":"cap_adL4VcE483MooYEMdYF7g","slug":"x402-payment-security-and-provenance-decision-procedure-ca32538d","name":"x402 Payment Security and Provenance Decision Procedure","description":"Decision procedure for an agent that monetizes APIs over x402 and needs to keep its merchant secrets safe while proving who paid and for what. Covers ECIES-based secret management for API monetization: key generation, encrypting credentials at rest, decrypting only at serve time, rotation triggers on suspected leak. Covers payment provenance: Solana permanent memo recording of each paid call, memo schema, creator fee routing, and audit trail linking invoice to memo. Covers full-stack asset","url":"https://k2so-8080.on.ascii.dev/api/services/agent-facing-x402-payment-security-and-provenanc?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","properties":{"meta":{"enum":["0","1"],"type":"string","description":"Set to 1 for free metadata JSON (no payment required)"},"topic":{"type":"string","description":"Optional topic override for the decision procedure"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","title":"x402 payment security and provenance procedure paid response","$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":null,"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_63csZJJLxvlnXZlzPBVlt","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 an AI-generated decision procedure guiding agents on how to secure API credentials and prove payment provenance when monetizing APIs over the x402 protocol.","exampleAgentPrompt":"Can you walk me through the full security and provenance procedure for monetizing an API over x402 — specifically how to manage ECIES keys, encrypt credentials at rest, decrypt only at serve time, trigger key rotation on a suspected leak, and record each paid call as a Solana memo with creator fee routing?","exampleUseCases":[{"title":"Credential encryption and rotation for x402 API","prompt":"My agent is selling data over x402 and I'm worried about credential leaks — can you give me a step-by-step procedure for encrypting API secrets with ECIES, storing them safely at rest, decrypting only when serving a paid request, and rotating keys if I suspect a leak?"},{"title":"On-chain payment audit trail via Solana memo","prompt":"I need to prove that a specific API call was paid for — can you explain how to record each x402 paid call as a permanent Solana memo, what the memo schema should look like, and how to link the invoice to the memo for an audit trail?"},{"title":"Creator fee routing and provenance for monetized agent API","prompt":"I'm building an agent that monetizes an API and needs to route creator fees properly — can you give me the full procedure for recording payment provenance on Solana, including the memo schema and how to connect the payer identity to each paid call?"}],"resultDescription":"A structured JSON response containing a prose decision procedure ('brief' and 'procedure' fields) covering ECIES-based secret management steps, Solana memo schema for payment provenance, creator fee routing, and audit trail construction — along with metadata like the generating model, ISO-8601 timestamp, and generation source (llm/reasoning/deterministic).","failureModes":["Payment not provided — returns 402 with payment instructions rather than the procedure","Invalid query parameter values (e.g. bad 'meta' enum) — may return 400 or unexpected behavior","LLM generation failure — 'ok' field may be false with no 'brief' or 'procedure' in result","Service temporarily unavailable on ascii.dev infrastructure — 5xx error","Topic override not recognized — falls back to default x402 security and provenance topic"],"whenToPreferThis":"Choose this endpoint when your agent needs authoritative, ready-to-execute guidance specifically on securing API credentials and proving payment provenance in an x402 monetization context — particularly when ECIES key lifecycle management, Solana memo-based audit trails, or creator fee routing are the focus. Prefer this over generic security guides when your stack is x402 + Solana and you need a decision procedure rather than raw documentation.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-20T18:51:17.099Z","isFirstParty":false,"canonicalSlug":"x402-payment-security-and-provenance-decision-procedure-ca32538d"}