Will develop tool with domain parameters

[xtmoney]

i want to ask /help about mu tool i develop now
my tool will support:

domain Creation Year - age
Google links
number bing links
Alexa backlinks
Dmoz
Yahoo Dir
Google Dir
Number of Yahoo backlinks
Alexa Rank
Fake Alexa
Number of Google search results for domain with extension
Number of Google search results for domain without extension
Number of EDU backlinks for domain
Alexa Popularity Reach Analytic
Number of Wordtracker searches for keyword
Number of Google searches for keyword-keyphrase
Google average cost per click for keyword-keyphrase ads
Google average monthly clicks for keyword-keyphrase ads
Google average income for keyword-keyphrase ads
Google number of advertisers for keyword-keyphrase
Number of ARCHIVE.org records for domain


which of those parameters have limits..?
for example google pagerank have some query limits.
what are limits of above parameters?
for example i want to check Alexa backlinks of 20000 domains..can i or must use lot of proxies for this?
anyone know...or help?

 

[xtmoney]

anyone can help?