import requests

def send_out(limit=None, start=None):
    url = 'https://h...content-available-to-author-only...n.org/get' + '?'

    data = {'limit': str(limit), 'start': str(start)}
    if data:
        url = '&'.join(f'{k}={v}' for k, v in data.items())
    return data

payload = send_out(1,1)
r = requests.get('https://h...content-available-to-author-only...n.org/get', params=payload)
print(r.url)