{"uid":"cap_-kjl47B7yZL6MFmv3ITOL","slug":"x402-trading-hub-mempool-pending-transactions-eb7828de","name":"x402 Trading Hub - Mempool Pending Transactions","description":"67 paid endpoints for on-chain, forex, stocks & market intelligence","url":"https://trading-hub-v4-omega.vercel.app/api/mempool/pending?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":null,"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.19","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":"$0.19/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.19","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.19","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_Yk5dZTmvOTmu0Qc2A2Ql-","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.19","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Fetches pending (unconfirmed) transactions from the blockchain mempool in real time","exampleAgentPrompt":"Can you pull the current pending transactions from the mempool so I can see what's waiting to be confirmed and what gas prices people are bidding?","exampleUseCases":[{"title":"Gas price estimation before transaction","prompt":"Before I send this ETH transfer, can you check the mempool to see what gas prices pending transactions are using right now so I know what to bid?"},{"title":"MEV bot opportunity scanning","prompt":"Pull the latest pending mempool transactions and look for any large swaps or arbitrage opportunities that haven't been confirmed yet."},{"title":"Transaction stuck diagnosis","prompt":"I sent a transaction a while ago and it hasn't confirmed — can you check the mempool to see if it's still pending and what position it might be in?"}],"resultDescription":"Returns a list or snapshot of pending (unconfirmed) transactions currently sitting in the blockchain mempool, including details such as transaction hashes, sender/receiver addresses, value, gas price, and nonce. Useful for gas estimation, MEV analysis, and monitoring on-chain activity before block inclusion.","failureModes":["Network or node connectivity issues returning empty or stale mempool data","Rate limiting or payment failure resulting in HTTP 402 or 429 responses","Invalid filter parameters returning no results or an error","Mempool may be very large causing truncated or paginated responses","Chain-specific endpoints may not be available for all networks"],"whenToPreferThis":"Use this endpoint when you need real-time visibility into unconfirmed blockchain transactions before they are included in a block — ideal for gas price estimation, MEV scanning, monitoring specific address activity, or diagnosing stuck transactions. Prefer this over block-level endpoints when timing and pre-confirmation data matter.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-11-02T06:30:52.042Z","isFirstParty":false,"canonicalSlug":"x402-trading-hub-mempool-pending-transactions-eb7828de"}