Here is some python sample code that uses point.io api calls to list of the files & folders in the root of all storage sites configured for an account. Get your account here http://point.io/hack and make sure you pip install requests - Check it:

pointio-list-all-files.py

import requests

#Defines the api's core URL
URL ='https://api.point.io/api/v2'

#Validate User's Creds and Return a SessionKey
header = {"Authorization": ""}

#Change the email, password and apikey values to your credentials
authInfo = {"email":<your email>, "password":<your password>, "apikey":<your api key>}

#Submit Authorization request
skey = requests.post(URL+'/auth.json', data=authInfo)

#Set the Session Key variable
SessionKey = skey.json()

sskey =SessionKey["RESULT"].get("SESSIONKEY")
	
authHeader = {"Authorization":sskey}

#List the Access Rules
acRule = requests.get(URL + '/accessrules/list.json', headers=authHeader)
AccessRule = acRule.json()

total = 0

#for each Access Rule get the ShareID which equals a FolderID key when listing 
for ar in AccessRule["RESULT"].get("DATA"):
    folderID = {"folderid": ar[1]}
    resp = requests.get(URL+'/folders/list.json', headers=authHeader, data=folderID)

    #Now list all the File names 
    file = resp.json()
  
      #Print all of the file & folder names in the Root directory
    for f in file["RESULT"].get("DATA"):
        print "Storage type: "+ ar[4] +" --- Item Name: " + f[1] + " ----   Type: " + f[2]
        total += 1
print "The total # of items is: %s" % str(total)