Pre-reqs: This is python3, specifically tested with python 3.8 on mac. It definitely won't work with python 2. I use virtualenvwrapper for managing python environments.

Steps:

Make a .env file with these options to use twilio for your notification

TWILIO_AUTH_TOKEN=

TWILIO_ACCOUNT_SID=

FROM_NUMBER=

TO_NUMBER=

Once that file is set...

run pip install -r requirements.txt

fill in your lattitude and longitude in scrape.py under the json for the walgreens section

At the bottom of the file, you can uncomment/comment out the providers you want to see

 #get_pages("ALL", "https://www.maimmunizations.org/clinic/search?location=&search_radius=All&q%5Bvenue_search_name_or_venue_name_i_cont%5D=Fenway&q%5Bclinic_date_gteq%5D=&q%5Bvaccinations_name_i_cont%5D=&commit=Search#search_results")
        client = requests.Session()
        client = bootstrap_walgreens(client)
        walgreens(client)
        cvs("MA")
        time.sleep(60)

mac users: uncomment the notify section for toasts

run python scrape.py

it will send you an sms if it finds any slots. be fast, have your info saved in autofill using one of those advanced autofill plugins

This is a little rough n tumble but hopefully it helps you!