Python sample code

socket.py

from urllib import urlencode
from urllib2 import Request, urlopen

authkey = 'YOUR_AUTHKEY' # Set your Auth-Key here
url = 'http://flow.viasocket.com/trigger/sample_url/slack_integration' # Set your socket URL here

post_fields = {'foo': 'bar'}     # Set POST fields here

request = Request(url, urlencode(post_fields).encode())
request.add_header('Auth-Key', authkey)
json = urlopen(request).read().decode()
print(json)