{"uid":"cap_jxbDeRseRVnJB5-OWXKK_","slug":"basebuilder2-trading-mempool-pending-transactions-66e06f38","name":"Basebuilder2 Trading - Mempool Pending Transactions","description":"BaseBuilder Trading API hub - 20 paid endpoints","url":"https://bbx-trading.vercel.app/api/mempool/pending?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":null,"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.188704","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":"$0.188704/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.188704","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.188704","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_KCd2prWiN6s4fJ8cq8w81","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.188704","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Retrieves pending (unconfirmed) transactions from the blockchain mempool","exampleAgentPrompt":"Pull the current list of pending transactions sitting in the mempool from BBX Trading so I can see what's waiting to be confirmed on-chain right now.","exampleUseCases":[{"title":"Monitor mempool before a large trade","prompt":"Before I execute my large token swap, check the BBX Trading mempool endpoint and show me all pending transactions so I can gauge congestion and pick the right gas price."},{"title":"Detect front-running or sandwich attacks","prompt":"Scan the current mempool pending transactions via BBX Trading and flag any large DEX swaps that could front-run my upcoming trade."},{"title":"Track a specific pending transaction","prompt":"Query the BBX Trading mempool right now and tell me if there are any pending transactions from my wallet address that are still unconfirmed."}],"resultDescription":"Returns a list of pending (unconfirmed) transactions currently sitting in the blockchain mempool, likely including transaction hashes, sender/receiver addresses, value amounts, gas prices, and timestamps or nonce data depending on the underlying chain queried.","failureModes":["Mempool data may be stale or incomplete if the underlying node is not fully synced","Empty result set if mempool is clear or filters are too restrictive","HTTP 402 Payment Required if x402 payment header is missing or insufficient","Service unavailability due to Vercel cold starts or backend node downtime","Rate limiting or quota exhaustion after excessive calls","Malformed POST body may result in 400 Bad Request"],"whenToPreferThis":"Choose this endpoint when you need real-time visibility into unconfirmed blockchain transactions for trading strategy, congestion monitoring, or pre-confirmation analysis. It is part of a paid x402-gated trading API hub, so prefer it when you need programmatic mempool access integrated into an automated trading or monitoring workflow.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-20T18:34:33.643Z","isFirstParty":false,"canonicalSlug":"basebuilder2-trading-mempool-pending-transactions-66e06f38"}