内置保障的USDC收益率Quicknode Earn 现已推出 USDC 收益产品，该产品内置了由 OpenCover 承保的协议风险保障。Base 上有六个受保障的金库。
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Polkadot builders need more than basic RPC. Quicknode runs the full surface: Substrate JSON-RPC, Sidecar REST, and Asset Hub access, with archive history, all from one dashboard.
Query and subscribe to Polkadot data with low latency. From a single call to live finalized heads, you get the right interface for the job.
Six ways to access Polkadot data, from a single query to Sidecar REST and live subscriptions. Pick the interface, ship faster.
The Polkadot relay-chain JSON-RPC over HTTPS and WSS for blocks, state, and extrinsic submission.
Point @polkadot/api at a Quicknode Polkadot endpoint and read headers, balances, and state, or submit extrinsics. The same Substrate JSON-RPC you already use, on private low-latency infrastructure.
Point polkadot.js or the Substrate Sidecar at a Quicknode Polkadot endpoint. Queries, extrinsics, and tooling carry over.
Substrate JSON-RPC for the relay chain and Asset Hub, plus the Sidecar REST API for historical data.
Docs, guides, and runnable sample apps for every Polkadot workload. Clone, customize, and ship.
Full reference for the Polkadot Substrate JSON-RPC, the Sidecar REST API, and Asset Hub, with query and extrinsic examples.
See every supported Polkadot API, network, and product on Quicknode in one place.
From your first Polkadot endpoint to mission-critical production workloads, Quicknode scales with you. Get started in minutes.
Spin up your Polkadot endpoint and ship. The free tier covers prototyping and small production loads, no credit card required.
Dedicated Polkadot infrastructure, contractual SLAs, priority support, and procurement-ready terms for wallets, exchanges, trading firms, and high-volume protocols.
常见问题解答
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The Polkadot toolchain you already know works unchanged on Quicknode. polkadot.js, the Substrate Sidecar, and standard WebSocket clients all point at a Quicknode endpoint.
Full Polkadot archive with no pruning. Query historical relay-chain and Asset Hub state over the Substrate JSON-RPC and read account and block history through the Sidecar REST API.
Parachain JSON-RPC for token transfers, NFT management, and Asset Hub state queries.
The Substrate API Sidecar for RESTful access to historical blocks, accounts, and balances.
Read staking, nominations, and OpenGov referenda over the Substrate JSON-RPC and Sidecar REST to power dashboards and voting tools.
Subscribe to new and finalized heads and storage changes over a persistent WSS connection with Substrate pub/sub. Push updates the moment blocks finalize, with no polling.
// Query Polkadot with polkadot.jsimport { ApiPromise, WsProvider } from "@polkadot/api";const api = await ApiPromise.create({provider: new WsProvider(QUICKNODE_POLKADOT_WSS_URL)});const header = await api.rpc.chain.getHeader();const { data } = await api.query.system.account(address);// Substrate JSON-RPC and Sidecar REST on private infrastructure.
Runnable sample apps and starter kits across Quicknode-supported chains, including Polkadot. Clone one and ship.
“Quicknode 提供市场上最稳定、低延迟、高性能的节点，具备广泛的多链覆盖范围和卓越的技术支持。”伊万·梅特，南森公司工程经理