Troubleshooting⏱️ 3 min read📅 2026-06-04

How to Fix Error 403 Error – urllib2.HTTPError: HTTP Error 403: Forbidden

Identify the issue with urllib2 and resolve it.

Quick Answer: Check if the URL is correctly formatted, ensure proper user agent and cookie handling.

📋 Table of Contents

  1. 🛑 Root Causes of the Error
  2. 🛠️ Step-by-Step Verified Fixes
  3. 🎯 Final Words

The urllib2.HTTPError: HTTP Error 403: Forbidden error occurs when the server denies access to the requested resource. In this case, you are trying to download a CSV file from the NSE India website using Python's urllib2 library.

This issue is frustrating because it prevents you from accessing the historical stock data you need. Fortunately, we will outline two methods to resolve this problem and provide you with detailed instructions for each method.

🛑 Root Causes of the Error

  • The primary reason for this error is that the NSE India website does not allow automated downloads of its content. The server may be configured to only allow human users to access the data.
  • Another possible cause is that the cookies required for authentication are not being accepted by the server. This could be due to the user agent or other factors.

🛠️ Step-by-Step Verified Fixes

Changing User Agent and Accepting Cookies

  1. Step 1: Replace the default user agent with a more generic one, such as 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.3' in your request header.
  2. Step 2: Add the `accept` parameter to the `headers` dictionary with `cookies=True` to accept the response cookies. For example: `headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.3', 'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8'}`
  3. Step 3: Use the `opener` object to send the request and retrieve the response. For example: `opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cookielib.LWPCookieJar()), urllib2.HTTPHandler())`,

Using a Different Library (requests)

  1. Step 1: Install the requests library using pip: `pip install requests`
  2. Step 2: Replace the urllib2 library with the requests library. For example: `import requests`,

🎯 Final Words

To resolve the urllib2.HTTPError: HTTP Error 403: Forbidden error, you can try changing the user agent and accepting cookies or use a different library like requests. If you are still experiencing issues, please check the NSE India website for any updates or changes to their server configuration.

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