Quicknode gives you high-performance access to the Base blockchain through HTTP and WebSocket (WSS) endpoints. These endpoints are designed for reliability, speed, and real-time data delivery, and provide the foundation for building scalable Web3 applications.
HTTP 端點
Quicknode HTTP 端點提供穩健的 JSON-RPC API 存取功能，具備多種效能層級及針對不同應用程式需求所設計的優化功能。
https://your-endpoint.quiknode.pro/auth-token/最適合：
- Web3 應用程式的後端與 API
- 智慧合約的部署與互動
- 區塊鏈資料查詢與分析
- 開發與測試環境
WebSocket (WSS) 端點
Quicknode WebSocket 端點透過針對不同使用情境與效能需求所優化的持久連線，提供即時區塊鏈資料串流服務。
wss://your-endpoint.quiknode.pro/auth-token/最適合：
- 需要即時價格饋送的 DeFi 應用程式
- 區塊鏈瀏覽器與分析儀表板
- 交易監控與確認追蹤
- 智慧合約事件監聽
WebSocket (WSS) 限制
WebSocket 回應設有特定上限，且該上限可能有所變動。若回應可能較大，建議使用 POST 請求。若回應大小超過上限，將顯示對應的錯誤代碼 -32616。
信用使用狀況
Different methods consume different amounts of credits: View Base API credit costs →
Flat Rate RPS
Flat Rate RPS is a billing option that provides predictable monthly costs for Base endpoints. Instead of metering individual requests and charging with API Credits, you pay a fixed monthly fee based on your configured request capacity. Your bill stays the same each month regardless of actual usage.
You can check the Flat Rate RPS documentation to learn more.
速率限制
速率限制因方案等級而異：查看詳細定價與限制 →
MEV Protection (Standard Plans)
Maximum Extractable Value (MEV) refers to the profit that can be extracted by manipulating the order of transactions within a block. Validators, miners, or bots can reorder, insert, or censor transactions to capture value that would otherwise go to users. This manifests as worse trade prices, failed transactions, or unexpected losses during on-chain interactions.
MEV Protection is a transaction routing service that mitigates these risks by sending your transactions through encrypted private relay networks directly to block builders. Instead of broadcasting to the public mempool where MEV searchers monitor and exploit pending transactions, your transaction remains hidden until it is included in a block. This prevents bots from observing transaction details and executing attacks based on your intended actions.
This protection is most critical for DeFi operations (swaps, liquidity provision, lending), NFT minting during high-demand launches, liquidation protection in lending protocols, and any time-sensitive transaction where ordering affects execution quality or cost.
運作原理
In standard transaction flow, your transaction is broadcast to the public mempool where it becomes visible to all network participants. MEV searchers continuously monitor the mempool for profitable opportunities, analyzing pending transactions to identify targets for extraction. They then submit competing transactions with higher gas fees to ensure their manipulative transactions are ordered favorably by validators.
MEV Protection eliminates this exposure by routing transactions through private relay infrastructure provided by trusted partners such as Blink. Your transaction is encrypted and sent directly to block builders who include it in a block without prior public visibility. The transaction bypasses the public mempool entirely, preventing MEV bots from detecting, analyzing, or reacting to your intended on-chain action. The on-chain execution and final result remain identical to standard routing, but without the risk of value extraction by third parties.
What MEV Protection defends against
MEV Protection defends against the most common forms of value extraction:
- Front-running: Bots detect your pending transaction and submit an identical or competing transaction with higher gas to be executed first, profiting from the price impact your transaction will create.
- Sandwich attacks: Attackers place two transactions around yours-one before to manipulate the price unfavorably, and one after to profit from the price movement your transaction causes. This results in worse execution prices and higher slippage for your trade.
- Back-running: Bots execute transactions immediately after yours to capitalize on state changes you create, such as arbitrage opportunities from price discrepancies your trade generates.
- Transaction reordering: Block builders or validators reorder transactions within a block to extract maximum value, potentially causing your transaction to execute under less favorable conditions than anticipated.
What it does not affect
MEV Protection is a protection service, not an optimization service. It does not modify or enhance gas pricing, trade execution prices, spreads, transaction success rates, or confirmation times. Your smart contracts execute with the same logic and produce identical on-chain results as they would through standard routing.
No additional fees or code changes are required. MEV Protection operates at the RPC routing layer and does not require modifications to your application, wallet, or SDK integration.
Limitations and considerations
Mempool visibility: Transactions routed through MEV Protection will not appear in public mempool explorers or monitoring tools until they are included in a block. This is expected behavior as the transaction bypasses the public mempool entirely.
No fallback mechanism: If the private relay network fails to include your transaction in a block, it will not automatically retry through the public mempool. Your application should implement appropriate retry logic if needed.
Network availability: MEV Protection is currently available for Ethereum, BSC, Base, Arbitrum, and Solana. Transactions on other networks will use standard public mempool routing.
Disabling MEV Protection
MEV Protection is automatically enabled for all new endpoints created on Standard Plans. Your transactions are immediately protected with no setup, configuration changes, or modifications to your wallet or SDK required. This happens transparently at the RPC routing level.
If your application requires public mempool visibility for monitoring or debugging, or you prefer standard routing, you can disable it:
- Per endpoint: Navigate to your endpoint dashboard where you will see the MEV Protection section on the right side. Use the toggle to turn off MEV Protection. A warning dialog will appear with two options: "Keep MEV" to cancel the change, or "Disable MEV" to confirm and route transactions through the public mempool.
供應狀況
MEV Protection is available on all Standard Plan endpoints for supported networks (Ethereum, BSC, Base, Arbitrum, and Solana). This provides automatic protection against frontrunning and sandwich attacks with no additional cost or configuration.
Enterprise customers requiring custom routing strategies, execution guarantees, or MEV rebate programs should contact sales@quicknode.com for advanced MEV protection options with tailored configurations.