How to Ranking and backlinks list in php

Hi,

I'm currently trying to create a complete tool for SEO but i'm facing some problems.
(I'm developing with php)

First, how can i get the position from google SERP ?
I know google has multiples data centers so i send a query with my keyword on various datacenters,I parse the content and then i chose the average position
The problem is google understand it's not an human query and ask for a captcha.
I dont think using proxies is the solution, it's kind of difficult and i'm sure there is another solution.
The website positeo[.]com/check-position/ provide the same kind of service and don't use proxies (on my opinion)

The second problem is to get the backlink list. the command link: doesn't provide all the backlinks and isn't often updated.

Every advices apreciated.

Thanks all

You can get the SERP position by quering google just like you do from your browser. Yes, on various datacenters the results are different, no matter if you use same language and region settings.

Private proxies are your only solution, there's no other way around it

As about the backlinks, yes, no longer the link:domain.com is good for checking backlinks

Use Majestic API or Mozscape to get the links data
http://developer-support.majesticseo.com/api/
http://moz.com/products/api
they cost money, but there in nothing else for free