[Bug]: Proxy Not Working with Oxylabs and Bright Data on v0.6.3 (net::ERR_NO_SUPPORTED_PROXIES)

[avrum]

crawl4ai version

0.6.3

Expected Behavior

[Bug]: Proxy Not Working with Oxylabs and Bright Data on v0.6.3 (net::ERR_NO_SUPPORTED_PROXIES)

Description

I'm experiencing persistent issues using both Oxylabs and Bright Data proxy services with Crawl4AI (v0.6.3).
I've reviewed and tried the workarounds suggested in #993 and by @rubinsh, but have not managed to get proxies working reliably.

---

What works

• Using the same proxy credentials with plain Python requests or curl works fine.
• For example:

  proxy_config = ProxyConfig(
      server=f"https://{host}:{port}",
      username=f"{proxy_username}",
      password=proxy_password
  )
  # This works with Python requests/curl
  

---

What doesn't work

• When using this proxy config with Crawl4AI’s BrowserConfig, the browser always fails to load the page.

• I consistently get the following error:

  net::ERR_NO_SUPPORTED_PROXIES
  

• Example traceback:

  [ERROR]... × https://www.google.com | Error: Unexpected error in _crawl_web at line 744
  in _crawl_web (.venv\lib\site-packages\crawl4ai/async_crawler_strategy.py):
  Error: Failed on navigating ACS-GOTO:
  Page.goto: net::ERR_NO_SUPPORTED_PROXIES at https://www.google.com/
  

---

Steps to Reproduce

1. Set up a proxy with Oxylabs or Bright Data (residential proxy).
2. Pass proxy config to Crawl4AI as follows:

   proxy_config = ProxyConfig(
       server=f"https://{host}:{port}",
       username=f"{proxy_username}",
       password=proxy_password
   )
   browser_config = BrowserConfig(
       headless=True,
       proxy_config=proxy_config
   )
   

3. Try to crawl any page (e.g., google.com).

---

Expected Behavior

The browser should successfully connect through the proxy and load the target page, as it does in a regular Python request.

Actual Behavior

The crawler fails with net::ERR_NO_SUPPORTED_PROXIES (see above).

---

Environment

• Crawl4AI version: 0.6.3
• Python: 3.10.11
• OS: Windows11

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Additional Notes

• Tried with both Oxylabs and Bright Data residential proxies, multiple credentials, ports, and servers.
• Previous discussion: #993, @avrum

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Is this reproducible?

Yes, 100% reproducible with both proxy providers.

Current Behavior

.

Is this reproducible?

Yes

Inputs Causing the Bug

Steps to Reproduce

Code snippets

OS

Windows

Python version

3.10.11

Browser

No response

Browser version

No response

Error logs & Screenshots (if applicable)

No response

[thyago-coelho-rentcars]

I'm having the same error here :/

[shubhamwebspider]

You can fix it using from crawl4ai import ProxyConfig from crawl4ai.async_configs import BrowserConfig proxy_config = ProxyConfig(server=f"URL",username="USERNAME",password="PASS" ) browser_cfg = BrowserConfig( headless=True, proxy_config=proxy_config, verbose=True )

[SohamKukreti]

@avrum Did you try testing this in crawl4ai v0.7.4?

[ntohidi]

@avrum , as Soham explained here here the recommended approach now is to use the ProxyConfig object instead:

proxy_config = ProxyConfig(
    server=f"http://{proxy_address}:{proxy_port}",
    username=username,
    password=password,
)

and then pass it to CrawlerRunConfig.