Troubleshooting Ethereum Trading Bot Errors on Binance Using Python and WebSocket Connection

As a developer of automated trading bots running on a Mac with VS Code, you are not the only one who is having trouble connecting to the Binance exchange via the WebSockets API. Permission denied errors are common when trying to establish a connection between your code and the Exchange server. In this article, we will walk you through some troubleshooting steps and how to resolve the issue.

Understanding the Problem

The error message PermissionError: [Errno 13] Permission denied usually means that your program cannot obtain permission to connect to the Binance API or WebSocket server. This could be due to several reasons, including:

• Inadequate permissions on your computer system

• A misconfigured user account with insufficient privileges

• The Binance API key or access token is not set up correctly

Troubleshooting Steps

To resolve this issue, follow these steps:

1. Check your Binance settings and permissions

Before connecting to the Exchange API, make sure you have:

• A valid Binance API key (API ID) and access token

• The correct account type (e.g. Binance REST API)

• The correct user role in your account settings

You can find these details on the [Binance Developer Platform](

2. Check your Python environment variables

Make sure the following environment variables are set correctly:

• PATH: Points to the directory containing your Python interpreter

• USER: Specifies the login credentials of the current user (not required for this step)

• Binance_API_KEY and Binance_ACCESS_TOKEN: Set these variables with your Binance API key and access token

You can check your environment variables by running:

python -c "import os; print(os.environ['PATH'])"

3. Check your user account permissions

In VS Code, go to
Preferences (Ctrl+Shift+P or Cmd+Shift+P), select
Python, and then click the
Project: [your project name]

tab. Look for the “Execution” section and make sure your user account has sufficient permissions.

4. Check your Python version and interpreter

Make sure you are using the latest version of Python (3.9 or later) with the correct interpreter. You can check this by running:

python --version

5. Reconfigure Binance API and WebSocket connections

If the above steps do not resolve the issue, try reconfiguring the Binance API and WebSocket connections:

• Binance API: Update your binance.py file with your API key and access token.

• Binance WebSocket: Make sure you have installed the correct library (eg pybinance or pypi-binance) and configured it correctly.

6. Check the WebSocket connection

Use a tool like curl to test your WebSocket connection:

curl -X POST \

   \

  -H 'Content-Type: application/json' \

  -d '{"symbol": "BTCUSDT", "type": "limit", "limit": 10}'



Replace with your API key and access token

If you still have problems, feel free to share more details about your code and environment. I will be happy to help further!