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Node.js & JavaScript SDK for Bybit REST API & WebSockets

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SDK Logo

Node.js & JavaScript SDK for the Bybit REST APIs and WebSockets:

  • Complete integration with all Bybit REST APIs & WebSockets.
  • Actively maintained with a modern, promise-driven interface.
  • TypeScript support (with type declarations for most API requests & responses).
  • Over 450 end-to-end tests making real API calls & WebSocket connections, validating any changes before they reach npm.
  • Robust WebSocket integration with configurable connection heartbeats & automatic reconnect then resubscribe workflows.
    • Event driven messaging.
    • Smart websocket persistence
      • Automatically handle silent websocket disconnections through timed heartbeats, including the scheduled 24hr disconnect.
      • Automatically handle listenKey persistence and expiration/refresh.
      • Emit reconnected event when dropped connection is restored.
  • Proxy support via axios integration.
  • Active community support & collaboration in telegram: Node.js Algo Traders.

Installation

npm install --save bybit-api

Issues & Discussion

  • Issues? Check the issues tab.
  • Discuss & collaborate with other node devs? Join our Node.js Algo Traders engineering community on telegram.
  • Follow our announcement channel for real-time updates on X/Twitter

Related projects

Check out my related JavaScript/TypeScript/Node.js projects:

Documentation

Most methods accept JS objects. These can be populated using parameters specified by Bybit's API documentation, or check the type definition in each class within the github repository (see table below for convenient links to each class).

Structure

This connector is fully compatible with both TypeScript and pure JavaScript projects, while the connector is written in TypeScript. A pure JavaScript version can be built using npm run build, which is also the version published to npm.

The version on npm is the output from the build command and can be used in projects without TypeScript (although TypeScript is definitely recommended).

  • src - the whole connector written in TypeScript
  • lib - the JavaScript version of the project (built from TypeScript). This should not be edited directly, as it will be overwritten with each release.
  • examples - examples & demonstrations. Contributions are welcome!

REST API Clients

Bybit has several API groups (originally one per product). Each generation is labelled with the version number (e.g. v1/v2/v3/v5). New projects & developments should use the newest available API generation (e.g. use the V5 APIs instead of V3).

Refer to the V5 interface mapping page for more information on which V5 endpoints can be used instead of previous V3 endpoints.

Here are the available REST clients and the corresponding API groups described in the documentation:

Class Description
[ V5 API ] The new unified V5 APIs (successor to previously fragmented APIs for all API groups). To learn more about the V5 API, please read the V5 upgrade guideline.
RestClientV5 Unified V5 all-in-one REST client for all V5 REST APIs
WebsocketClient All WebSocket Events (Public & Private for all API categories)
[ Derivatives v3 ] The Derivatives v3 APIs (successor to the Futures V2 APIs)
UnifiedMarginClient Derivatives (v3) Unified Margin APIs
ContractClient Derivatives (v3) Contract APIs.
[ Other ] Other standalone API groups
CopyTradingClient Copy Trading APIs
AccountAssetClientV3 Account Asset V3 APIs

Deprecated/Obsolete APIs

The following API clients are for previous generation REST APIs and will be removed in the next major release. Some have already stopped working (because bybit stopped supporting them). You should use the V5 APIs for all new development.

Click me to see the list of APIs
Class Description
[ Futures v2 ] The Futures v2 APIs
InverseClient Inverse Perpetual Futures (v2) APIs
LinearClient USDT Perpetual Futures (v2) APIs
InverseFuturesClient Inverse Futures (v2) APIs
[ Spot ] The spot APIs
SpotClientV3 Spot Market (v3) APIs
SpotClient (deprecated, SpotClientV3 recommended) Spot Market (v1) APIs
[ USDC Contract ] The USDC Contract APIs
USDCPerpetualClient USDC Perpetual APIs
USDCOptionClient USDC Option APIs
AccountAssetClient (deprecated, AccountAssetClientV3 recommended) Account Asset V1 APIs

Examples for using each client can be found in:

If you're missing an example, you're welcome to request one. Priority will be given to github sponsors.

Usage

Create API credentials on Bybit's website:

All REST clients have can be used in a similar way. However, method names, parameters and responses may vary depending on the API category you're using!

Not sure which function to call or which parameters to use? Click the class name in the table above to look at all the function names (they are in the same order as the official API docs), and check the API docs for a list of endpoints/parameters/responses.

The following is a minimal example for using the REST clients included with this SDK. For more detailed examples, refer to the examples folder in the repository on GitHub:

const {
  InverseClient,
  LinearClient,
  InverseFuturesClient,
  SpotClientV3,
  UnifiedMarginClient,
  USDCOptionClient,
  USDCPerpetualClient,
  AccountAssetClient,
  CopyTradingClient,
  RestClientV5,
} = require('bybit-api');

const restClientOptions = {
  /** Your API key. Optional, if you plan on making private api calls */
  key?: string;

  /** Your API secret. Optional, if you plan on making private api calls */
  secret?: string;

  /** Set to `true` to connect to testnet. Uses the live environment by default. */
  testnet?: boolean;

  /** Override the max size of the request window (in ms) */
  recv_window?: number;

  /** Default: false. If true, we'll throw errors if any params are undefined */
  strict_param_validation?: boolean;

  /**
   * Optionally override API protocol + domain
   * e.g baseUrl: 'https://api.bytick.com'
   **/
  baseUrl?: string;

  /** Default: true. whether to try and post-process request exceptions. */
  parse_exceptions?: boolean;

  /** Default: false. Enable to parse/include per-API/endpoint rate limits in responses. */
  parseAPIRateLimits?: boolean;

  /** Default: false. Enable to throw error if rate limit parser fails */
  throwOnFailedRateLimitParse?: boolean;
};

const API_KEY = 'xxx';
const API_SECRET = 'yyy';
const useTestnet = false;

const client = new RestClientV5({
  key: API_KEY,
  secret: API_SECRET,
  testnet: useTestnet,
  // Optional: enable to try parsing rate limit values from responses
  // parseAPIRateLimits: true
},
  // requestLibraryOptions
);

// For public-only API calls, simply don't provide a key & secret or set them to undefined
// const client = new RestClientV5({});

client.getAccountInfo()
  .then(result => {
    console.log("getAccountInfo result: ", result);
  })
  .catch(err => {
    console.error("getAccountInfo error: ", err);
  });

client.getOrderbook({ category: 'linear', symbol: 'BTCUSD' })
  .then(result => {
    console.log("getOrderBook result: ", result);
  })
  .catch(err => {
    console.error("getOrderBook error: ", err);
  });

WebSockets

All API groups can be used via a shared WebsocketClient. However, to listen to multiple API groups at once, you will need to make one WebsocketClient instance per API group.

The WebsocketClient can be configured to a specific API group using the market parameter. These are the currently available API groups:

API Category Market Description
V5 Subscriptions market: 'v5' The v5 websocket topics for all categories under one market. Use the subscribeV5 method when subscribing to v5 topics.

Older Websocket APIs

The following API groups are still available in the WebsocketClient but are deprecated and may no longer work. They will be removed in the next major release:

Click me to see the table
API Category Market Description
Unified Margin - Options market: 'unifiedOption' The derivatives v3 category for unified margin. Note: public topics only support options topics. If you need USDC/USDT perps, use unifiedPerp instead.
Unified Margin - Perps market: 'unifiedPerp' The derivatives v3 category for unified margin. Note: public topics only support USDT/USDC perpetual topics - use unifiedOption if you need public options topics.
Futures v2 - Inverse Perps market: 'inverse' The inverse v2 perps category.
Futures v2 - USDT Perps market: 'linear' The USDT/linear v2 perps category.
Futures v2 - Inverse Futures market: 'inverse' The inverse futures v2 category uses the same market as inverse perps.
Spot v3 market: 'spotv3' The spot v3 category.
Spot v1 market: 'spot' The older spot v1 category. Use the spotv3 market if possible, as the v1 category does not have automatic re-subscribe if reconnected.
Copy Trading market: 'linear' The copy trading category. Use the linear market to listen to all copy trading topics.
USDC Perps market: 'usdcPerp The USDC perps category.
USDC Options market: 'usdcOption' The USDC options category.
Contract v3 USDT market: 'contractUSDT' The Contract V3 category (USDT perps)
Contract v3 Inverse market: 'contractInverse' The Contract V3 category (inverse perps)

WebSocket Examples

Here's a minimal example for using the websocket client. For more complete examples, look into the ws-* examples in the examples folder in the repo on GitHub.

const { WebsocketClient } = require('bybit-api');

const API_KEY = 'xxx';
const PRIVATE_KEY = 'yyy';

const wsConfig = {
  key: API_KEY,
  secret: PRIVATE_KEY,

  /*
    The following parameters are optional:
  */

  // Connects to livenet by default. Set testnet to true to use the testnet environment.
  // testnet: true

  // If you can, use the v5 market (the newest generation of Bybit's websockets)
  market: 'v5',

  // how long to wait (in ms) before deciding the connection should be terminated & reconnected
  // pongTimeout: 1000,

  // how often to check (in ms) that WS connection is still alive
  // pingInterval: 10000,

  // how long to wait before attempting to reconnect (in ms) after connection is closed
  // reconnectTimeout: 500,

  // recv window size for authenticated websocket requests (higher latency connections (VPN) can cause authentication to fail if the recv window is too small)
  // recvWindow: 5000,

  // config options sent to RestClient (used for time sync). See RestClient docs.
  // restOptions: { },

  // config for axios used for HTTP requests. E.g for proxy support
  // requestOptions: { }

  // override which URL to use for websocket connections
  // wsUrl: 'wss://stream.bytick.com/realtime'
};

const ws = new WebsocketClient(wsConfig);

// (before v5) subscribe to multiple topics at once
ws.subscribe(['position', 'execution', 'trade']);

// (before v5) and/or subscribe to individual topics on demand
ws.subscribe('kline.BTCUSD.1m');

// (v5) subscribe to multiple topics at once
ws.subscribeV5(['orderbook.50.BTCUSDT', 'orderbook.50.ETHUSDT'], 'linear');

// (v5) and/or subscribe to individual topics on demand
ws.subscribeV5('position', 'linear');
ws.subscribeV5('publicTrade.BTC', 'option');

// Listen to events coming from websockets. This is the primary data source
ws.on('update', (data) => {
  console.log('update', data);
});

// Optional: Listen to websocket connection open event (automatic after subscribing to one or more topics)
ws.on('open', ({ wsKey, event }) => {
  console.log('connection open for websocket with ID: ' + wsKey);
});

// Optional: Listen to responses to websocket queries (e.g. the response after subscribing to a topic)
ws.on('response', (response) => {
  console.log('response', response);
});

// Optional: Listen to connection close event. Unexpected connection closes are automatically reconnected.
ws.on('close', () => {
  console.log('connection closed');
});

// Optional: Listen to raw error events. Recommended.
ws.on('error', (err) => {
  console.error('error', err);
});

See websocket-client.ts for further information.

Logging

Customise logging

Pass a custom logger (or mutate the imported DefaultLogger class) which supports the log methods silly, debug, notice, info, warning and error, or override methods from the default logger as desired, as in the example below:

const { WebsocketClient, DefaultLogger } = require('bybit-api');

// Disable all logging on the silly level
const customLogger = {
  ...DefaultLogger,
  silly: () => {},
};

const ws = new WebsocketClient({ key: 'xxx', secret: 'yyy' }, customLogger);

Debug HTTP requests

In rare situations, you may want to see the raw HTTP requets being built as well as the API response. These can be enabled by setting the BYBITTRACE env var to true.

Browser Usage

Import

This is the "modern" way, allowing the package to be directly imported into frontend projects with full typescript support.

  1. Install these dependencies 
    npm install crypto-browserify stream-browserify
  2. Add this to your tsconfig.json 
    {
  "compilerOptions": {
    "paths": {
      "crypto": [
        "./node_modules/crypto-browserify"
      ],
      "stream": [
        "./node_modules/stream-browserify"
      ]
}
  3. Declare this in the global context of your application (ex: in polyfills for angular) 
    (window as any).global = window;

Webpack

This is the "old" way of using this package on webpages. This will build a minified js bundle that can be pulled in using a script tag on a website.

Build a bundle using webpack:

  • npm install
  • npm build
  • npm pack

The bundle can be found in dist/. Altough usage should be largely consistent, smaller differences will exist. Documentation is still TODO - contributions welcome.

Contributions & Thanks

Have my projects helped you? Share the love, there are many ways you can show your thanks:

  • Star & share my projects.
  • Are my projects useful? Sponsor me on Github and support my effort to maintain & improve them: https://github.com/sponsors/tiagosiebler
  • Have an interesting project? Get in touch & invite me to it.
  • Or buy me all the coffee:
    • ETH(ERC20): 0xA3Bda8BecaB4DCdA539Dc16F9C54a592553Be06C

pixtron

An early generation of this library was started by @pixtron. If this library helps you to trade better on bybit, feel free to donate a coffee to @pixtron:

  • BTC 1Fh1158pXXudfM6ZrPJJMR7Y5SgZUz4EdF
  • ETH 0x21aEdeC53ab7593b77C9558942f0c9E78131e8d7
  • LTC LNdHSVtG6UWsriMYLJR3qLdfVNKwJ6GSLF

Contributions & Pull Requests

Contributions are encouraged, I will review any incoming pull requests. See the issues tab for todo items.

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