{"uid":"cap_IEtVkpv8M4NsoLNRXTvsY","slug":"onchaininja-mev-detection-5f5bf2f0","name":"OnChaiNinja MEV Detection","description":"Alpha signals, whale tracking, rug scanning, and MEV protection across Base, Solana, Arbitrum, and more.","url":"https://nininonchain.vercel.app/api/mev/%7Bchain%7D/%7Btx%7D?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"properties":{"type":"string"}}},"responseSchema":{"type":"json","example":{"mevDetected":false}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"3","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"registry","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":"$3/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"3","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"3","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_j0sJ294cQt_32_-Pd7Por","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"3","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Detects MEV (Maximal Extractable Value) activity for a specific transaction on a given blockchain chain","exampleAgentPrompt":"Can you check if this Arbitrum transaction 0xabc123...def was subject to any MEV — like a sandwich attack or front-running?","exampleUseCases":[{"title":"Sandwich attack check on a DEX swap","prompt":"I just swapped ETH for USDC on Base and I think I got sandwiched — can you check transaction 0xdeadbeef...1234 on Base for any MEV activity?"},{"title":"Post-trade MEV audit on Arbitrum","prompt":"After my Arbitrum trade settled, I want to know if any MEV bots extracted value from transaction 0x9f8e7d...4321 — can you run a MEV scan on it?"},{"title":"Solana transaction MEV verification","prompt":"Check this Solana transaction abc123XYZ...789 for front-running or sandwich bot activity — I want to know if MEV was detected before I use this DEX again."}],"resultDescription":"Returns a JSON object indicating whether MEV was detected on the given transaction (e.g. {\"mevDetected\": false}), signaling whether the transaction was subject to front-running, sandwiching, or other MEV extraction techniques.","failureModes":["Invalid or unrecognized chain identifier — endpoint may return an error or empty result","Transaction hash not found on the specified chain — may return not-found or null result","Unsupported chain — chain not among Base, Solana, Arbitrum, or other supported networks","Malformed transaction hash — returns validation error","Payment failure — $3 USDC per call not fulfilled, request rejected","Network timeout — blockchain RPC latency causing delayed or failed response"],"whenToPreferThis":"Use this endpoint when you need to determine post-hoc whether a specific on-chain transaction was subject to MEV extraction (front-running, sandwiching, back-running) across multi-chain environments including Base, Solana, and Arbitrum. Prefer this over generic block explorers when you need a structured, machine-readable MEV verdict rather than raw transaction data.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-20T12:32:53.629Z","isFirstParty":false,"canonicalSlug":"onchaininja-mev-detection-5f5bf2f0"}