Troubleshooting Ethereum Trading Bot Errors Using Python and WebSocket

As a developer of automated trading bots running on Mac with VS Code, you’re not the only one who has had trouble connecting to Binance Exchange via the WebSockets API. Access Denied errors are common when trying to connect your code to Exchange servers. In this article, we’ll walk you through a few steps to diagnose and fix the problem.

Understanding the Problem

The error message “PermissionError: [Error 13] Permission denied” usually means that the program is denied permission to connect to the Binance API or WebSocket server. This can happen for several reasons, including:

• Insufficient permissions on your computer’s system

• Incorrectly configured user account with insufficient permissions

• Binance API key or access token not configured correctly

Troubleshooting Steps

To resolve this issue, please follow these steps:

1. Verify Binance configuration and permissions

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

• Valid Binance API key (API ID) and access token

• Valid account type (e.g. Binance REST API)

• Valid user role in account settings

See [Binance Developer Platform]( for details.

2. Check your Python environment variables

Make sure the following environment variables are set correctly:

• PATH: Points to the directory containing the Python interpreter

• USER: Specifies the login credentials of the current user (not needed 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.environment['PATH'])"

3. Check your user account permissions

In VS Code, go to
Settings (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. This can be checked by running:

python --version

5. Reconfiguring Binance API and WebSocket connections

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

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

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

6. Verify 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 trouble, feel free to share more details about your code and environment. I’d be happy to help you further!

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