Whist experimenting at work with the new GWT Api I found that the python example google provides has a bug – as well as some rather opaque documentation that misses out a crucial step. When you set up your credentials you also have to make sure that the consent screen section is fillout with at leat the project name and a suport email!
Updated script follows
# --- MJW Fixed Bugs
logging.basicConfig() # added to fix warning error
from apiclient import errors
from apiclient.discovery import build
from oauth2client.client import OAuth2WebServerFlow
# Copy your credentials from the console rember to update the consent screen with a name and a suport email
CLIENT_ID = 'xxxxx'
CLIENT_SECRET = 'yyyy'
# Check https://developers.google.com/webmaster-tools/v3/ for all available scopes
OAUTH_SCOPE = 'https://www.googleapis.com/auth/webmasters.readonly'
# Redirect URI for installed apps
REDIRECT_URI = 'urn:ietf:wg:oauth:2.0:oob'
# Run through the OAuth flow and retrieve credentials
flow = OAuth2WebServerFlow(CLIENT_ID, CLIENT_SECRET, OAUTH_SCOPE, REDIRECT_URI)
authorize_url = flow.step1_get_authorize_url()
print 'Go to the following link in your browser: ' + authorize_url
code = raw_input('Enter verification code: ').strip()
credentials = flow.step2_exchange(code)
# Create an httplib2.Http object and authorize it with our credentials
http = httplib2.Http()
http = credentials.authorize(http)
webmasters_service = build('webmasters', 'v3', http=http)
# Retrieve list of websites in account
site_list = webmasters_service.sites().list().execute()
# Remove all unverified sites - note chage origioanl uses url and not siteURL
verified_sites_urls = [s['siteUrl'] for s in site_list['siteEntry'] if s['permissionLevel'] != 'siteUnverifiedUser']
# Printing the urls of all sites you are verified for.
for site_url in verified_sites_urls:
# Retrieve list of sitemaps submitted
sitemaps = webmasters_service.sitemaps().list(siteUrl=site_url).execute()
if 'sitemap' in sitemaps:
sitemap_urls = [s['path'] for s in sitemaps['sitemap']]
print " " + "\n ".join(sitemap_urls)