import scrapy
from urllib.parse import urlencode

def get_zenrows_api_url(url, api_key):
    # Define the necessary parameters
    payload = {
        'url': url,
        'js_render': 'true',
        'js_instructions': '[{"wait": 500}]',
        'premium_proxy': 'true',
        'antibot': 'true',
    }

    # Construct the API URL
    api_url = f'https://api.zenrows.com/v1/?apikey={api_key}&{urlencode(payload)}'
    return api_url