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User Data Streams for Binance (2023-01-24)

General WSS information

  • The base API endpoint is: https://api.binance.us
  • A User Data Stream listenKey is valid for 60 minutes after creation.
  • Doing a PUT on a listenKey will extend its validity for 60 minutes.
  • Doing a DELETE on a listenKey will close the stream and invalidate the listenKey.
  • Doing a POST on an account with an active listenKey will return the currently active listenKey and extend its validity for 60 minutes.
  • The base websocket endpoint is: wss://stream.binance.us:9443
  • User Data Streams are accessed at /ws/<listenKey> or /stream?streams=<listenKey>
  • A single connection to stream.binance.us is only valid for 24 hours; expect to be disconnected at the 24 hour mark

API Endpoints

Create a listenKey

POST /api/v3/userDataStream

Start a new user data stream. The stream will close after 60 minutes unless a keepalive is sent. If the account has an active listenKey, that listenKey will be returned and its validity will be extended for 60 minutes.

Weight: 1

Parameters: NONE

Response:

{
  "listenKey": "pqia91ma19a5s61cv6a81va65sdf19v8a65a1a5s61cv6a81va65sdf19v8a65a1"
}

Ping/Keep-alive a listenKey

PUT /api/v3/userDataStream

Keepalive a user data stream to prevent a time out. User data streams will close after 60 minutes. It's recommended to send a ping about every 30 minutes.

Weight: 1

Parameters:

Name Type Mandatory Description
listenKey STRING YES

Response:

{}

Close a listenKey

DELETE /api/v3/userDataStream

Close out a user data stream.

Weight: 1

Parameters:

Name Type Mandatory Description
listenKey STRING YES

Response:

{}

Web Socket Payloads

Account Update

The event outboundAccountPosition is sent any time an account balance has changed and contains the assets that were possibly changed by the event that generated the balance change.

{
  "e": "outboundAccountPosition", //Event type
  "E": 1564034571105,             //Event Time
  "u": 1564034571073,             //Time of last account update
  "B": [                          //Balances Array
    {
      "a": "ETH",                 //Asset
      "f": "10000.000000",        //Free
      "l": "0.000000"             //Locked
    }
  ]
}

Order Update

Orders are updated with the executionReport event.

Payload:

{
  "e": "executionReport",        // Event type
  "E": 1499405658658,            // Event time
  "s": "ETHBTC",                 // Symbol
  "c": "mUvoqJxFIILMdfAW5iGSOW", // Client order ID
  "S": "BUY",                    // Side
  "o": "LIMIT",                  // Order type
  "f": "GTC",                    // Time in force
  "q": "1.00000000",             // Order quantity
  "p": "0.10264410",             // Order price
  "P": "0.00000000",             // Stop price
  "F": "0.00000000",             // Iceberg quantity
  "g": -1,                       // OrderListId
  "C": "",                       // Original client order ID; This is the ID of the order being canceled
  "x": "NEW",                    // Current execution type
  "X": "NEW",                    // Current order status
  "r": "NONE",                   // Order reject reason; will be an error code.
  "i": 4293153,                  // Order ID
  "l": "0.00000000",             // Last executed quantity
  "z": "0.00000000",             // Cumulative filled quantity
  "L": "0.00000000",             // Last executed price
  "n": "0",                      // Commission amount
  "N": null,                     // Commission asset
  "T": 1499405658657,            // Transaction time
  "t": -1,                       // Trade ID
  "I": 8641984,                  // Ignore
  "w": true,                     // Is the order on the book?
  "m": false,                    // Is this trade the maker side?
  "M": false,                    // Ignore
  "O": 1499405658657,            // Order creation time
  "Z": "0.00000000",             // Cumulative quote asset transacted quantity
  "Y": "0.00000000",             // Last quote asset transacted quantity (i.e. lastPrice * lastQty)
  "Q": "0.00000000",             // Quote Order Quantity
  "W": 1499405658657,            // Working Time; This is only visible if the order has been placed on the book.
  "V": "NONE"                    // SelfTradePreventionMode
}

Note: Average price can be found by doing Z divided by z.

Conditional Fields in Execution Report

These are fields that appear in the payload only if certain conditions are met.

Field Name Description Examples
d Trailing Delta Appears only for trailing stop orders. "d": 4
D Trailing Time "D": 1668680518494
v Prevented Match Id Appears only for orders that expired due to STP. "v": 3
A Prevented Quantity "A":"3.000000"
B Last Prevented Quantity "B":"3.000000"
u Trade Group Id "u":1
U Counter Order Id "U":37

If the order is an OCO, an event named ListStatus will be sent in addition to the executionReport event.

Payload

{
  "e": "listStatus",                //Event Type
  "E": 1564035303637,               //Event Time
  "s": "ETHBTC",                    //Symbol
  "g": 2,                           //OrderListId
  "c": "OCO",                       //Contingency Type
  "l": "EXEC_STARTED",              //List Status Type
  "L": "EXECUTING",                 //List Order Status
  "r": "NONE",                      //List Reject Reason
  "C": "F4QN4G8DlFATFlIUQ0cjdD",    //List Client Order ID
  "T": 1564035303625,               //Transaction Time
  "O": [                            //An array of objects
    {
      "s": "ETHBTC",                //Symbol
      "i": 17,                      // orderId
      "c": "AJYsMjErWJesZvqlJCTUgL" //ClientOrderId
    },
    {
      "s": "ETHBTC",
      "i": 18,
      "c": "bfYPSQdLoqAJeNrOr9adzq"
    }
  ]
}

Execution types

  • NEW - The order has been accepted into the engine.
  • CANCELED - The order has been canceled by the user.
  • REPLACED (currently unused)
  • REJECTED - The order has been rejected and was not processed. (This message appears only with Cancel Replace Orders wherein the new order placement is rejected but the request to cancel request succeeds.)
  • TRADE - Part of the order or all of the order's quantity has filled.
  • EXPIRED - The order was canceled according to the order type's rules (e.g. LIMIT FOK orders with no fill, LIMIT IOC or MARKET orders that partially fill) or by the exchange, (e.g. orders canceled during liquidation, orders canceled during maintenance)
  • TRADE_PREVENTION - The order has expired due to STP.

Check the Rest API Documentation and below for relevant enum definitions.

Balance Update

Balance Update occurs during deposit or withdrawals from the account.

Payload

{
  "e": "balanceUpdate",         //Event Type
  "E": 1573200697110,           //Event Time
  "a": "BTC",                   //Asset
  "d": "100.00000000",          //Balance Delta
  "T": 1573200697068            //Clear Time
}