{"uid":"cap_W_0qRr5wnp2ZDzXafAS0M","slug":"agent-onchain-front-running-and-mempool-exposure-protection-procedure-5cfb92fc","name":"Agent Onchain Front-Running and Mempool Exposure Protection Procedure","description":"Decision procedure for when an agent's predictable onchain payment or trade needs mempool opacity. Covers: front-runnable pattern scoring for scheduled payments, recurring x402 settlements, and timer-driven DEX trades; value thresholds that trigger private-transaction relay routing; timing randomization and deadline jitter to break mempool prediction; slippage and priority-fee discipline for visible transactions; batch-and-reveal grouping for multi-part settlements; and the fallback ladder from","url":"https://k2so-8080.on.ascii.dev/api/services/agent-onchain-front-running-and-mempool-exposure?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","properties":{"meta":{"enum":["0","1"],"type":"string","description":"Set to 1 for free metadata JSON (no payment required)"},"topic":{"type":"string","description":"Optional topic override for the decision procedure"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","title":"Agent onchain front-running and mempool exposure protection procedure paid response","$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_ZZ3-Rhd0iIbUb0_jIMthl","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 decision procedure brief for protecting agent onchain payments and DEX trades from mempool front-running, covering pattern scoring, private relay routing, timing jitter, slippage discipline, and batch-reveal grouping.","exampleAgentPrompt":"My agent runs recurring x402 settlements and timer-driven DEX trades — can you give me a decision procedure for scoring their front-run risk and tell me which value thresholds should trigger private relay routing, how to jitter timing, and what slippage discipline to apply?","exampleUseCases":[{"title":"Recurring x402 payment front-run defense","prompt":"My agent makes scheduled x402 payments every hour on the dot — walk me through a decision procedure to score whether that pattern is front-runnable and tell me when to switch to a private relay instead."},{"title":"DEX trade MEV protection for trading agent","prompt":"My autonomous trading agent fires DEX swaps on a fixed timer. Give me a procedure for detecting mempool exposure risk on those trades and recommend what slippage limits and priority fees I should enforce to avoid getting sandwiched."},{"title":"Batch-and-reveal grouping for multi-part settlements","prompt":"I have an agent doing multi-part onchain settlements — should I be grouping them with batch-and-reveal to hide the pattern? Walk me through the decision criteria and show me the fallback ladder if the private relay route fails."}],"resultDescription":"A structured decision procedure brief containing: a front-runnable pattern score for the agent's payment or trade type, value thresholds that trigger private-transaction relay routing, timing randomization and deadline jitter recommendations, slippage and priority-fee discipline rules for visible transactions, batch-and-reveal grouping guidance for multi-part settlements, and a fallback ladder from private relay through alternative protection strategies. Delivered as prose text with optional topic override, plus generation metadata (model, timestamp, generation source).","failureModes":["Payment not received — returns HTTP 402 requiring USDC payment before content is served","Invalid method — only GET/HEAD/DELETE accepted; POST or PUT returns method-not-allowed error","Topic override not recognized — procedure may default to generic front-running guidance rather than topic-specific advice","Service temporarily unavailable — upstream LLM or reasoning engine failure returns non-OK response","Stale generation — generatedAt timestamp may indicate cached rather than fresh reasoning if LLM is rate-limited"],"whenToPreferThis":"Choose this endpoint when your agent needs structured, actionable guidance on mempool exposure and front-running risk for onchain payments or DEX trades — particularly for recurring x402 settlements, scheduled payments, or timer-driven trades where predictable patterns create MEV vulnerability. Prefer this over generic MEV documentation when you need a scored decision procedure with concrete thresholds, routing recommendations, and a fallback ladder tailored to autonomous agent payment workflows.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-20T18:55:39.698Z","isFirstParty":false,"canonicalSlug":"agent-onchain-front-running-and-mempool-exposure-protection-procedure-5cfb92fc"}