{"uid":"cap_FE8Uo2sxyPCzilkOi62LS","slug":"onchaininja-mev-protection-check-25916fb9","name":"OnChaiNinja MEV Protection Check","description":"Alpha signals, whale tracking, rug scanning, and MEV protection across Base, Solana, Arbitrum, and more.","url":"https://onchaininja.vercel.app/api/mev/%7Bchain%7D/%7Btx%7D","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":"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":"$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_VLnvlc0roPB2igDaHAGL_","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":"Analyzes a specific transaction on a given chain to detect MEV (Maximal Extractable Value) threats and protection status","exampleAgentPrompt":"Can you check this Base transaction 0x4a3b...f92c for MEV attacks — I think my swap got sandwiched by a bot.","exampleUseCases":null,"resultDescription":"Returns a JSON object with a mevDetected boolean flag and likely additional details about MEV activity, attack type, or protection status for the specified transaction on the given chain.","failureModes":["Invalid or unrecognized chain identifier returns error","Transaction hash not found on specified chain","Malformed transaction hash format causes parsing error","Chain not supported (e.g. unsupported L2) returns 404 or error","Payment not processed results in 402 response","Rate limiting or service unavailability returns 5xx"],"whenToPreferThis":"Use this endpoint when you need to determine whether a specific on-chain transaction was subject to MEV exploitation (sandwich attacks, frontrunning, backrunning) on chains like Base, Solana, or Arbitrum. Prefer this over generic block explorers when you need a structured, machine-readable MEV risk signal for DeFi trading bots, post-trade analysis, or wallet security checks.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T06:40:06.846Z","isFirstParty":false}