I've started playing with the API using Python Requests but cannot figure out how to use /reader/add_url properly. Why does the following code get a 403 response for add_url?
import requests
login = requests.post('http://www.newsblur.com/api/login', {'username': 'exampleuser', 'password': 'passw0rd'})
print '/api/login', login
addurl = requests.post('http://www.newsblur.com/reader/add_url', {'url' : 'http://blog.newsblur.com'})
print '/reader/add_url', addurl
logout = requests.post('http://www.newsblur.com/api/logout')

