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Thanks Paul, I asked my question from that help page that you linked above and am still waiting for their response!

understand. But there are some advanced people who want both . Just follow your competitor. I need both Because of issue and limitation. example you have a system only possible to see up to 10k backlink . But if I need 100k backlink analysis what I can do. also cost too high. No sense with 500$. how its possible majestic only charge 50$ provide us all everything including api access with 5 million backlink. I believe both will be same product in your seo moz. If you survey you will se most people use your competitor link metrics because reasonable and high. as a millionaire company seo experienced I see that how they sell the product. If you test it for few days you will see the response. Thousand of people serious interested your product also use seo moz product improve your sales. Most people want to use both link metrics for serious research.

Hey Shinya, I'm guessing from your question that you are trying the above API query and receiving an error (401 Unauthorized - unauthorized api 'links/page_to_page.domain_authority'). The reason is because the Scope and Sort parameters you are using are incompatible. The request you are sending is asking for pages on the same domain to be sorted by Domain Authority, but they will all have the same Domain Authority. However, if you try something like this, it should work to sort the results by Page Authority. Let me know if you are still seeing the results you are hoping for! http://lsapi.seomoz.com/linkscape/links/www.seomoz.org/blog?Scope=page_to_page&Sort=page_authority Thanks, Carin