To use a proxy with Scrapy in 2023, you would need to configure the HTTP_PROXY and HTTPS_PROXY settings in your Scrapy project's settings.py file.

For example, to use a proxy server located at "http://proxy.example.com:8080", you would set the following in settings.py:

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HTTP_PROXY = 'http://proxy.example.com:8080'
HTTPS_PROXY = 'http://proxy.example.com:8080'

You can also use proxy middleware to set proxy settings for each request. To use proxy middleware, you will need to install it first. You can install it using pip:

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pip install scrapy-proxy-pool

Then, you need to add it to the DOWNLOADER_MIDDLEWARES setting in your settings.py:

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DOWNLOADER_MIDDLEWARES = {
'scrapy_proxy_pool.middlewares.ProxyPoolMiddleware': 610,
'scrapy_proxy_pool.middlewares.BanDetectionMiddleware': 620,
}

It's important to know that using proxies can cause issues and even get your IP banned if you're scraping a website that doesn't like it. Some websites have protection mechanism and can detect when you're using a proxy, and the website may block your IP. It's a good practice to always check the website's "robots.txt" file before scraping and make sure that you're not breaking any rules or terms of use.

You can use free or Paid Proxy Services to get a list of working proxies, but be aware that free proxy services may not be reliable and may not be updated frequently. And also be aware that some of the paid proxy services may have a limit on the number of request you can make.

Keep in mind that, as of my knowledge cutoff date, this information is accurate and up-to-date. But, as the date is January 2023, new updates, changes or new versions of scrapy can be released that can change the way of using proxy.

The benefits using scrapy proxy