[Answers](https://scrapfly.io/blog)   /  [scrapy](https://scrapfly.io/blog/tag/scrapy)   /  [How to pass custom parameters to scrapy spiders?](https://scrapfly.io/blog/answers/how-to-pass-parameters-to-scrapy-spiders-cli)   # How to pass custom parameters to scrapy spiders?

 by [Bernardas Alisauskas](https://scrapfly.io/blog/author/bernardas) Apr 23, 2023 1 min read [\#scrapy](https://scrapfly.io/blog/tag/scrapy) 

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To configure scrapy spiders with custom execution parameters scrapy's CLI `-a` option can be used.

Scrapy sets `-a` CLI parameters as scrapy spider instance attributes (e.g. `-a country` -> `self.country`) when the crawl command is called.

For example, here we are passing country and proxy parameters to our scraper:

shell```shell
scrapy crawl myspider -a country=US -a "proxy=http://222.22.33.44:9000"
```



python```python
import scrapy

class MySpider(scrapy.Spider):
    name = "myspider"

    def parse(self, response):
        print(self.country)
        print(self.proxy)
```



This is an easy and useful feature for when specific customization is needed for each scrapy crawl command.

Additionally, the `-s` CLI parameter can be used to set or override any scrapy settings.



 

    



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