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Longbridge OpenAPI SDK for Node.js

longbridge provides an easy-to-use interface for invoking Longbridge OpenAPI.

Documentation

Examples

Runnable examples live in examples/nodejs/:

  • examples/nodejs/account_asset.js
  • examples/nodejs/http_client.js
  • examples/nodejs/subscribe_candlesticks.js
  • examples/nodejs/subscribe_quote.js
  • examples/nodejs/submit_order.js
  • examples/nodejs/today_orders.js

Quickstart

Install Longbridge OpenAPI SDK

npm install longbridge

Authentication

Longbridge OpenAPI supports two authentication methods:

1. OAuth 2.0 (Recommended)

OAuth 2.0 is the modern authentication method that uses Bearer tokens without requiring HMAC signatures.

Step 1: Register OAuth Client

First, register an OAuth client to get your client_id:

bash / macOS / Linux

curl -X POST https://openapi.longbridgeapp.com/oauth2/register \
  -H "Content-Type: application/json" \
  -d '{
    "client_name": "My Application",
    "redirect_uris": ["http://localhost:60355/callback"],
    "grant_types": ["authorization_code", "refresh_token"]
  }'

PowerShell (Windows)

Invoke-RestMethod -Method Post -Uri https://openapi.longbridgeapp.com/oauth2/register `
  -ContentType "application/json" `
  -Body '{
    "client_name": "My Application",
    "redirect_uris": ["http://localhost:60355/callback"],
    "grant_types": ["authorization_code", "refresh_token"]
  }'

Response:

{
  "client_id": "your-client-id-here",
  "client_secret": null,
  "client_name": "My Application",
  "redirect_uris": ["http://localhost:60355/callback"]
}

Save the client_id for use in your application.

Step 2: Build an OAuth client and create Config

OAuth.build() loads a cached token from ~/.longbridge-openapi/tokens/<client_id> (%USERPROFILE%\.longbridge-openapi\tokens\<client_id> on Windows) if one exists and is still valid, or starts the browser authorization flow automatically. The token is persisted to the same path after a successful authorization or refresh.

const { OAuth, Config } = require('longbridge');

async function main() {
  const oauth = await OAuth.build(
    "your-client-id",
    (_, url) => console.log("Open this URL to authorize: " + url)
  );
  const config = Config.fromOAuth(oauth);
  // Use config to create contexts...
}

main();

2. Legacy API Key (Environment Variables)

Setting environment variables (macOS/Linux)

export LONGBRIDGE_APP_KEY="App Key get from user center"
export LONGBRIDGE_APP_SECRET="App Secret get from user center"
export LONGBRIDGE_ACCESS_TOKEN="Access Token get from user center"

Setting environment variables (Windows)

setx LONGBRIDGE_APP_KEY "App Key get from user center"
setx LONGBRIDGE_APP_SECRET "App Secret get from user center"
setx LONGBRIDGE_ACCESS_TOKEN "Access Token get from user center"

Other environment variables

Name Description
LONGBRIDGE_LANGUAGE Language identifier, zh-CN, zh-HK or en (Default: en)
LONGBRIDGE_HTTP_URL HTTP endpoint url (Default: https://openapi.longbridge.com)
LONGBRIDGE_QUOTE_WS_URL Quote websocket endpoint url (Default: wss://openapi-quote.longbridge.com/v2)
LONGBRIDGE_TRADE_WS_URL Trade websocket endpoint url (Default: wss://openapi-trade.longbridge.com/v2)
LONGBRIDGE_ENABLE_OVERNIGHT Enable overnight quote, true or false (Default: false)
LONGBRIDGE_PUSH_CANDLESTICK_MODE realtime or confirmed (Default: realtime)
LONGBRIDGE_PRINT_QUOTE_PACKAGES Print quote packages when connected, true or false (Default: true)
LONGBRIDGE_LOG_PATH Set the path of the log files (Default: no logs)

Then create a config from the environment:

const { Config } = require('longbridge');
const config = Config.fromApikeyEnv();

Quote API (Get basic information of securities)

const { OAuth, Config, QuoteContext } = require('longbridge');

async function main() {
  const oauth = await OAuth.build(
    "your-client-id",
    (_, url) => console.log("Open this URL to authorize: " + url)
  );
  const config = Config.fromOAuth(oauth);
  const ctx = await QuoteContext.new(config);
  const resp = await ctx.quote(["700.HK", "AAPL.US", "TSLA.US", "NFLX.US"]);
  for (let obj of resp) {
    console.log(obj.toString());
  }
}

main();

Quote API (Subscribe quotes)

const { OAuth, Config, QuoteContext, SubType } = require('longbridge');

async function main() {
  const oauth = await OAuth.build(
    "your-client-id",
    (_, url) => console.log("Open this URL to authorize: " + url)
  );
  const config = Config.fromOAuth(oauth);
  const ctx = await QuoteContext.new(config);
  ctx.setOnQuote((_, event) => console.log(event.toString()));
  await ctx.subscribe(
    ["700.HK", "AAPL.US", "TSLA.US", "NFLX.US"],
    [SubType.Quote],
  );
}

main();

Trade API (Submit order)

const {
  OAuth,
  Config,
  TradeContext,
  Decimal,
  OrderSide,
  TimeInForceType,
  OrderType,
} = require('longbridge');

async function main() {
  const oauth = await OAuth.build(
    "your-client-id",
    (_, url) => console.log("Open this URL to authorize: " + url)
  );
  const config = Config.fromOAuth(oauth);
  const ctx = await TradeContext.new(config);
  const resp = await ctx.submitOrder({
    symbol: "700.HK",
    orderType: OrderType.LO,
    side: OrderSide.Buy,
    timeInForce: TimeInForceType.Day,
    submittedPrice: new Decimal("50"),
    submittedQuantity: new Decimal(200),
  });
  console.log(resp.toString());
}

main();

Troubleshooting

  • Windows setx requires a new terminal; use set for the current cmd.exe session.
  • If the script exits, you won't receive push events; keep Node running.
  • For debugging, set LONGBRIDGE_LOG_PATH to enable SDK logs.

License

Licensed under either of