--- title: "KuCoin Futures API Node.js SDK: 2026 Integration Guide" description: "Build a production-ready KuCoin Futures API Node.js SDK integration. Eliminate manual signing and manage async orders with awaitable WebSocket API workflows." canonical: "https://siebly.io/blog/kucoin-futures-api-nodejs-sdk-2026-integration-guide" --- # KuCoin Futures API Node.js SDK: 2026 Integration Guide Build a production-ready KuCoin Futures API Node.js SDK integration. Eliminate manual signing and manage async orders with awaitable WebSocket API workflows. ## Technical Disclaimer These articles are software engineering references for exchange API integrations. They are not financial, investment, legal, tax, compliance, or trading advice. Use public data, demo, testnet, or paper workflows first. Keep API credentials out of frontend code and disable withdrawal permissions for automation keys. ## Overview {#overview} Relying on deprecated official libraries for futures trading is a real stability risk. Integrating KuCoin Futures in Node.js often means a gap between the docs and what you actually have to ship: HMAC-SHA256 request signing, timestamp headers, a passphrase, and WebSocket reconnect logic that you should not be reinventing. This guide shows how to use the Siebly.io [kucoin-api](/sdk/kucoin/javascript) package for market data and order placement. It is a TypeScript-first SDK (works in JavaScript too) with dedicated REST clients and an awaitable WebSocket API. It signs requests for you. It does not throttle you. Rate limits stay your problem, which is what you want if you already have a queue. By the end you should have a working REST client, a public market-data stream, and futures order placement over both REST and the WebSocket API. ## Key Takeaways {#key-takeaways} - Pass `apiKey`, `apiSecret`, and `apiPassphrase` once. The SDK handles HMAC-SHA256 signing, timestamps, and the `KC-API-PASSPHRASE` header. - Use `WebsocketAPIClient` for awaitable order calls over a persistent WebSocket. Same `await` flow as REST, without a new TCP/TLS handshake per order. - `FuturesClient` covers classic futures REST. `WebsocketClient` covers public and private streams, including automatic heartbeats and reconnect. - KuCoin has no sandbox. It was delisted in July 2023. Use `submitNewOrderTest` to check signatures without sending an order to matching, then test with small live size. - Rate limits are not built into the SDK. Classic futures VIP0 is 2000 requests per 30 seconds. UTA/Pro VIP0 trading is 300 requests per second. Those are different pools. Do not mix them up. - The official `kucoin-node-sdk` was archived in March 2025. [kucoin-api](/sdk/kucoin/javascript) is a maintained alternative to rolling your own wrapper or depending on a dead library. ## The Challenge of Integrating KuCoin Futures APIs in Node.js {#the-challenge-of-integrating-kucoin-futures-apis-in-nodejs} The official `kucoin-node-sdk` was archived on 4 March 2025. KuCoin points people at `kucoin-universal-sdk`. Plenty of teams still end up writing a thin wrapper, then spending the next year chasing header formats and dropped sockets. KuCoin auth is a three-part credential: API key, secret, and passphrase. Private REST calls need HMAC-SHA256 signatures plus `KC-API-KEY`, `KC-API-SIGN`, `KC-API-TIMESTAMP`, `KC-API-PASSPHRASE`, and `KC-API-KEY-VERSION`. For key version 2 (the default in this SDK), the passphrase header is itself HMAC-signed. It is not a nonce. It is a millisecond timestamp. If your clock is wrong, requests fail. REST is fine for leverage, balances, and one-off orders. Execution and market data are better on WebSockets. The [kucoin-api](/sdk/kucoin/javascript) package signs REST and WebSocket traffic for you. You still own rate limiting. ### Understanding the KuCoin Futures API Structure {#understanding-the-kucoin-futures-api-structure} Public endpoints do not need keys. Private ones do. Futures also means leverage, margin mode, and position state. Two rate-limit models exist. Do not quote UTA numbers against classic futures REST: - Classic futures (`FuturesClient`, `api-futures.kucoin.com`): VIP0 is 2000/30s on the Futures pool. - UTA / Pro (`UnifiedAPIClient`): VIP0 is 300/s on the UTA Trading pool (includes WebSocket manage-order). Hit 429 and you wait. The SDK will not slow you down. ### Why DIY API Wrappers Fail in Production {#why-diy-api-wrappers-fail-in-production} WebSocket clients need heartbeats, reconnect, and resubscribe. Clock drift kills signed REST. Docs are split across classic futures, spot, and Pro/UTA. A maintained SDK already does the reconnect loop. You should not be writing ping/pong from scratch in 2026. ## Streamlining Authentication and Request Signing with kucoin-api {#streamlining-authentication-and-request-signing-with-kucoin-api} Install the package: ```js title="Imported example" npm install kucoin-api ``` Create API keys in [KuCoin API Key Management](https://www.kucoin.com/account/api). You need key, secret, and passphrase. The passphrase is not your account password. The SDK signs every private call. You pass credentials once. No per-request crypto. ### Configuring the KuCoin Futures Client {#configuring-the-kucoin-futures-client} ```js title="Imported example" const { FuturesClient } = require("kucoin-api"); const futuresClient = new FuturesClient({ apiKey: process.env.KUCOIN_API_KEY, apiSecret: process.env.KUCOIN_API_SECRET, apiPassphrase: process.env.KUCOIN_API_PASSPHRASE, }); ``` There is no `testnet: true` switch. KuCoin's sandbox URLs are dead. Timestamps come from `Date.now()` unless you pass `customTimestampFn`. The SDK does not fetch KuCoin server time on every request. Keep the machine clock in sync. `FuturesClient.getServerTime()` exists if you want to compare. Public calls do not need keys: ```js title="Imported example" const client = new FuturesClient(); const ticker = await client.getTicker({ symbol: "XBTUSDTM" }); console.log(ticker); ``` ### Best Practices for API Key Security {#best-practices-for-api-key-security} Least privilege. Disable withdrawals on bot keys. Whitelist IPs. Split market-data keys from execution keys if you can. Put secrets in environment variables, not in git. The [kucoin-api tutorial](/sdk/kucoin/javascript/tutorial) is the shortest path if you are migrating off raw axios. ## Awaitable WebSockets vs. Traditional REST for Futures Trading {#awaitable-websockets-vs-traditional-rest-for-futures-trading} REST is fine for config. For order entry, KuCoin's WebSocket API avoids a handshake per request. [kucoin-api](/sdk/kucoin/javascript) wraps that in `WebsocketAPIClient`, so you `await` an order the same way you would a REST call. The SDK maps request IDs to responses for you. The SDK does not rate-limit WebSocket commands either. Classic WebSocket client-to-server traffic is capped (100 messages per 10 seconds per connection). Stay under that yourself. ### Implementing Awaitable Order Placement {#implementing-awaitable-order-placement} This is the futures order path from the SDK's own WS API example. Far-from-market limit price so you do not accidentally fill while testing: ```js title="Imported example" const { WebsocketAPIClient } = require("kucoin-api"); const wsClient = new WebsocketAPIClient({ apiKey: process.env.KUCOIN_API_KEY, apiSecret: process.env.KUCOIN_API_SECRET, apiPassphrase: process.env.KUCOIN_API_PASSPHRASE, }); const futuresOrderResponse = await wsClient.submitFuturesOrder({ clientOid: "futures-test-" + Date.now(), side: "buy", symbol: "XBTUSDTM", marginMode: "CROSS", type: "limit", price: "1000", qty: "0.01", leverage: 10, positionSide: "LONG", // needed in hedge / two-way mode }); console.log("Futures order response:", futuresOrderResponse); ``` Same client can cancel: ```js title="Imported example" const cancelFuturesResponse = await wsClient.cancelFuturesOrder({ symbol: "XBTUSDTM", orderId: "your-order-id", }); ``` If you prefer classic REST: ```js title="Imported example" const orderRes = await futuresClient.submitOrder({ clientOid: futuresClient.generateNewOrderID(), side: "buy", type: "limit", price: "1000", symbol: "XBTUSDTM", size: 1, leverage: 2, }); ``` Note the field names. REST classic uses `size`. WebSocket API futures uses `qty`. Copy from the SDK examples, not from memory. Private account streams still matter after the ack. Partial fills and position updates come on the user-data WebSocket, not on the order-ack promise. ### Managing WebSocket Reliability and Reconnections {#managing-websocket-reliability-and-reconnections} You do not need to implement ping or exponential backoff. `WebsocketClient` already: - sends heartbeats (`pingInterval` / `pongTimeout` are configurable) - reconnects (`reconnectTimeout`, default 500ms) - resubscribes after reconnect - emits `reconnect` and `reconnected` so you can log or pause your own logic ```js title="Imported example" const { WebsocketClient } = require("kucoin-api"); const client = new WebsocketClient({ apiKey: process.env.KUCOIN_API_KEY, apiSecret: process.env.KUCOIN_API_SECRET, apiPassphrase: process.env.KUCOIN_API_PASSPHRASE, }); client.on("open", (data) => console.log("open:", data?.wsKey)); client.on("reconnect", (data) => console.log("reconnect:", data)); client.on("reconnected", (data) => console.log("reconnected:", data)); client.on("close", (data) => console.error("close:", data)); client.on("exception", (data) => console.error("exception:", data)); ``` Listen to those events. Do not roll your own reconnect loop on top, or you will fight the SDK. For more reconnect patterns, see [Solving WebSocket Reconnection Challenges](/blog). ## Building a Reliable Market Data and Order Execution Workflow {#building-a-reliable-market-data-and-order-execution-workflow} A sane sequence: - Step 1: Subscribe to public futures WebSockets for ticks and depth. - Step 2: Place orders with typed params (`FuturesClient.submitOrder` or `WebsocketAPIClient.submitFuturesOrder`). - Step 3: Validate signing with `submitNewOrderTest`. KuCoin has no sandbox. - Step 4: Watch positions, margin, and fills on private streams plus REST. ### Ingesting Real-Time Market Data {#ingesting-real-time-market-data} Classic public futures topics (no keys): ```js title="Imported example" const { WebsocketClient } = require("kucoin-api"); const client = new WebsocketClient(); client.on("update", (data) => { console.info("data received:", JSON.stringify(data)); }); client.subscribe( [ "/contractMarket/tickerV2:XBTUSDTM", "/contractMarket/ticker:XBTUSDTM", "/contractMarket/level2:XBTUSDTM", "/contractMarket/level2Depth5:XBTUSDTM", "/contractMarket/level2Depth50:XBTUSDTM", ], "futuresPublicV1", ); ``` Pro/UTA public futures uses `futuresPublicProV2` and topic objects (`ticker`, `obu`, `trade`) instead of the old `/contractMarket/...` strings. See `examples/WebSockets/ws-public-futures-pro-v2.ts` in the repo if you are on Pro. Keep ingestion off the execution path. [Building Scalable Market Data Ingestion Pipelines](/blog) covers that split. ### Testing without a sandbox {#testing-without-a-sandbox} KuCoin delisted sandbox (web and API) on 10 July 2023. There is no replacement environment. Classic futures has a test-order endpoint. Same params as a real order. It does not go to matching: ```js title="Imported example" const testRes = await futuresClient.submitNewOrderTest({ clientOid: futuresClient.generateNewOrderID(), side: "buy", type: "limit", price: "1000", symbol: "XBTUSDTM", size: 1, leverage: 2, }); ``` That checks signing and payload shape. It is not paper trading. For live behavior you still need a funded account and tiny size. ### AI-Optimized Workflows with Siebly AI {#ai-optimized-workflows-with-siebly-ai} If you use coding agents, the [Siebly AI Prompt Frameworks](/ai) give them the endpoint context so they stop inventing params. Still read the SDK types. Agents love mixing `size` and `qty`. Throttle yourself. Classic futures and UTA/Pro limits are not the same number. Start with `submitNewOrderTest`, then a far-from-market limit, then live. [kucoin-api on Siebly.io](/sdk/kucoin/javascript) has the REST and WS clients used above. ## Production Scaling and Engineering Best Practices {#production-scaling-and-engineering-best-practices} The SDK will not save a single-process bot that places and consumes on the same event loop. Split market data from order management. Log every request and WS event. Put a kill switch on max position size. ### Systematic Trading System Architecture {#systematic-trading-system-architecture} Decouple collectors from executors. If the book handler stalls, orders should still cancel. See [Algorithmic Trading System Architecture in Node.js](/blog/algorithmic-trading-system-architecture-in-nodejs-a-2026-engineering-guide). ### Transitioning to Siebly SDKs {#transitioning-to-siebly-sdks} Migration is: drop homemade signing, pass the three credentials, call `FuturesClient` / `WebsocketAPIClient`. Watch [siebly.io/releases](/releases) for endpoint changes. If you run multiple processes, put rate limiting in one place. Classic futures VIP0 is 2000/30s. UTA trading VIP0 is 300/s. Subaccounts on classic have independent quotas. UTA master/sub share a pool you can split. The SDK will happily 429 if you ignore this. ## Advancing Your Trading Infrastructure {#advancing-your-trading-infrastructure} [kucoin-api](/sdk/kucoin/javascript) removes HMAC and reconnect boilerplate. You still own clocks, keys, and rate limits. Use REST for setup, WebSocket streams for data, and the awaitable WebSocket API when order latency matters. KuCoin will not give you a testnet. Test signatures with `submitNewOrderTest`, then go live small. Ready to wire it up? [KuCoin Node.js SDK on Siebly.io](/sdk/kucoin/javascript). ## Frequently Asked Questions {#frequently-asked-questions} ### Is the official KuCoin Futures Node.js SDK still maintained? {#is-the-official-kucoin-futures-node-js-sdk-still-maintained} No. `kucoin-node-sdk` was archived on 4 March 2025. KuCoin's official successor is `kucoin-universal-sdk`. If you want the Siebly client used in this article, that is [kucoin-api](/sdk/kucoin/javascript) on npm. It is not futures-only. It also has `SpotClient`, `BrokerClient`, `UnifiedAPIClient`, and the shared WebSocket clients. ### How does the kucoin-api SDK handle API request signing? {#how-does-the-kucoin-api-sdk-handle-api-request-signing} You pass `apiKey`, `apiSecret`, and `apiPassphrase`. The SDK builds `KC-API-SIGN` with HMAC-SHA256 over timestamp + method + endpoint + body, sets `KC-API-TIMESTAMP` from local time, and sends a signed passphrase in `KC-API-PASSPHRASE` (key version 2). There is no nonce. Wrong clocks still fail. Optional `customSignMessageFn` can use Node's `createHmac` if Web Crypto is too slow for you. See `examples/auth/fasterHmacSign.ts`. ### Does the Siebly KuCoin SDK handle rate limiting automatically? {#does-the-siebly-kucoin-sdk-handle-rate-limiting-automatically} No. That is intentional. Classic futures and UTA/Pro have different pools and VIP tables. Build your own limiter. Watch `429` / `429000`. On a distributed setup, one shared limiter beats N containers all guessing. ### Can I use WebSockets for order placement with KuCoin Futures? {#can-i-use-websockets-for-order-placement-with-kucoin-futures} Yes. `WebsocketAPIClient.submitFuturesOrder()` (and cancel / batch variants) sends the command on the WebSocket API and returns a promise when KuCoin replies. Market data still uses `WebsocketClient.subscribe(...)`. Those are different connections. ### Is TypeScript supported in the Siebly KuCoin Futures integration? {#is-typescript-supported-in-the-siebly-kucoin-futures-integration} Yes. The package is written in TypeScript. Request and response types live next to `FuturesClient`, `UnifiedAPIClient`, and `WebsocketAPIClient`. JavaScript works the same via `require('kucoin-api')`. ### How do I handle WebSocket reconnections in a Node.js trading bot? {#how-do-i-handle-websocket-reconnections-in-a-node-js-trading-bot} You mostly don't. The SDK heartbeats and reconnects, then resubscribes. Hook `reconnect`, `reconnected`, `close`, and `exception` so your strategy knows the book might be stale. Tune `pingInterval`, `pongTimeout`, and `reconnectTimeout` if the defaults do not fit. Do not start a second reconnect state machine. ### What is the best way to secure my KuCoin API keys for automation? {#what-is-the-best-way-to-secure-my-kucoin-api-keys-for-automation} Env vars or a secret manager. No withdrawals on trading keys. IP whitelist. Least privilege. Passphrase is not the login password. ### Does Siebly offer examples for KuCoin Futures sandbox or testnet? {#does-siebly-offer-examples-for-kucoin-futures-sandbox-or-testnet} No, because KuCoin does not have one. Sandbox was delisted on 10 July 2023. `kucoin-api` does not expose a working testnet URL. Use `FuturesClient.submitNewOrderTest()` to validate a payload without matching. Then use small live orders. There is no paper-trading venue to toggle in the constructor. Disclaimer *Technical and legal disclaimer: Siebly.io provides software development tools, SDKs, documentation, and educational engineering content for crypto exchange API integrations. This content is for software engineering education only and is not financial, investment, legal, tax, accounting, compliance, or trading advice. Nothing in this article is a recommendation, invitation, or inducement to buy, sell, hold, trade, long, short, or allocate to any cryptoasset, exchange product, strategy, bot, or automated workflow. Examples, code patterns, simulations, backtests, and architecture diagrams are illustrative only and must not be treated as trading signals, investment recommendations, or evidence of future performance. Cryptoasset markets are high risk and volatile. If you choose to build or operate exchange-connected software, you are responsible for your own legal, regulatory, tax, security, exchange-account, API-key, and risk-management obligations. Use public data, testnet, demo, dry-run, or paper-trading workflows before any live execution. Keep API keys server-side, use least-privilege permissions, and never enable withdrawals for automation keys unless you fully understand and accept the risks. Siebly.io is not an exchange, custodian, investment adviser, trading-signal provider, or managed trading service. Official exchange documentation remains the source of truth for exchange-specific rules, API behavior, and terms of use. Use of Siebly.io content and software is also subject to the Siebly.io terms and conditions.* ## Related articles - [KuCoin Node.js SDK: A Guide to Modern Exchange Integration](/blog/kucoin-nodejs-sdk-a-guide-to-modern-exchange-integration) - [KuCoin Node.js SDK: Building Reliable Exchange Integrations in 2026](/blog/kucoin-nodejs-sdk-building-reliable-exchange-integrations-in-2026) - [Bitget Futures API Node.js SDK: A Professional Integration Guide](/blog/bitget-futures-api-nodejs-sdk-a-professional-integration-guide) ## Related Siebly Resources - [KuCoin JavaScript SDK](/sdk/kucoin/javascript) - [Siebly SDK directory](/sdk) - [Siebly AI Prompt Framework & Skills](/ai) - [Exchange State Management](/ai/exchange-state) - [Runnable exchange API examples](/examples)