How to User Data Streams for Binance

API Spot/Margin API
1

I’m studying on binance-spot-api-docs/user-data-stream.md at master · binance/binance-spot-api-docs · GitHub.
I tried this code:

export const postUserDataStream = () => {
  return axios.post(`https://api.binance.com/api/v3/userDataStream`, {
    headers: { "X-MBX-APIKEY": apiKey },
  });
};

and I get { code: -2014, msg: 'API-key format invalid.' }.
What’s the problem? How can I resolve?

==UPDATE==
The above code need to add null as second parameter for axios.post method.

2

Try the following code, I have confirmed it’s working:

const axios = require('axios');

const API_KEY = 'your_api_key';

const getListenKey = async () => {
  try {
    const response = await axios.post(`https://api.binance.com/api/v3/userDataStream`, null, {
      headers: {
        'X-MBX-APIKEY': API_KEY,
      },
    });

    const { listenKey } = response.data;
    console.log('WebSocket listenKey:', listenKey);
    return listenKey;
  } catch (error) {
    console.error('Error retrieving WebSocket listenKey:', error);
    throw error;
  }
};

getListenKey();
3

I get: msg: 'Invalid API-key, IP, or permissions for action.'.
I tried using both test and production APY_KEY. Maybe the API_KEY is different than SPOT API_KEY?

==UPDATE==
I forgot to add my IP to IP access restrictions on Binance site.

4

A last question about this topic. When I listen on “message” event for WebSocket I get a stream response but I can’t get the correct data. How to do this?

5

Sorry, what do you mean exactly by “you can’t get the correct data”? Are you subscribing to the correct Websocket Stream for your needs?

6

I found the solution. Once I get the response as stream I use KSON.parse(response.toString()) to get the json format of the response. Now the code works fine. Many thanks.