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Request API http://api.siteexplorer.info/
Source codes https://github.com/siteexplorer/ (sample codes, writed by csharp/php)
Arguments
auth your auth id(32 letters)
[test] is special AUTH ID, you can use it to query *.info domains when building your APP.
*Note: In Test Mode the data value is not always true except the data format, sometime it's randomly.
type json or xml
maxperpage
(Old version is [max], the new parameter is maxperpage)
it will be used when mask equals 011,222,333,444,666
 the max referring domains  per request(page) will be returned.
default value is 100.
the value range is 1~100
domain this parameter is only used for mask = 334, Backlinks from special referring domain
mask
value return data
000 !rank, page !rank(max 50 urls per request, joined by #)
100 meta all(rank, domain, backlinks, ip subnets, anchors etc.)
101 short meta: rank, domains, backlinks counts, ips, subnets(max 20 urls per request, joined by #)
011 domains, pages(export all backlinks)
222 top ranked pages (max 1000) for domain check only
333 top referring domains(max 1000) for domain or page check
334 Backlinks from special referring domain
444 Just discovered/New Backlinks
555 domains, pages(export all history backlinks 2013-2016)
666 Top ranked backlinks(max 1000)
777 Top ranked URL filtered by keywords (max 100)
range
value return data (only when mask = 444)
0 or default past month
1 past 24hours
2 past week
query
query type value example (escape it)
url http://siteexplorer.info/
domain domain:siteexplorer.info
next This argument must be set when you request next page to continue the results, this argument should be found in preious requested results.

BACKLINK API CODING EXAMPLE

Opensource: https://github.com/siteexplorer/ (sample codes, writed by csharp/php)

MASK DESCRIPTION REQUEST URL & RESPONSE DATA FORMAT EXAMPLE( XML FORMAT  or JSON FORMAT)
000 PAGE RANK http://api.siteexplorer.info/?auth=test&type=json&mask=000&query=domain%3asiteexplorer.info
http://api.siteexplorer.info/?auth=test&type=json&mask=000&query=http%3a%2f%2fsiteexplorer.info%2f
http://api.siteexplorer.info/?auth=test&type=json&mask=000&query=http%3a%2f%2fsiteexplorer.info%2f%23http%3a%2f%2fgoogle.info%2f
100 all meta info (page rank,
referring domains, backlinks,
 ip count, ip subnet count,
keywords, countries,
TLDs etc.)
http://api.siteexplorer.info/?auth=test&type=json&mask=100&query=domain%3asiteexplorer.info
http://api.siteexplorer.info/?auth=test&type=json&mask=100&query=http%3a%2f%2fsiteexplorer.info%2f
101 short meta:
 rank, referring domains,
backlinks counts, ip count, subnets.
http://api.siteexplorer.info/?auth=test&type=json&mask=101&query=domain%3asiteexplorer.info
http://api.siteexplorer.info/?auth=test&type=json&mask=101&query=http%3a%2f%2fsiteexplorer.info%2f
http://api.siteexplorer.info/?auth=test&type=json&mask=101&query=http%3a%2f%2fsiteexplorer.info%2f%23http%3a%2f%2fgoogle.info%2f
011 referring domains, backlinks
(all backlinks, not sorted)
http://api.siteexplorer.info/?auth=test&type=json&mask=011&maxperpage=100&query=domain%3asiteexplorer.info
http://api.siteexplorer.info/?auth=test&type=json&mask=011&maxperpage=100&query=http%3a%2f%2fsiteexplorer.info%2f
222 top ranked pages
 (max 1000)
order by page rank
for domain check only
http://api.siteexplorer.info/?auth=test&type=json&mask=222&maxperpage=100&query=domain%3asiteexplorer.info
333 top referring domains
(max 1000)
order by domain rank
http://api.siteexplorer.info/?auth=test&type=json&mask=333&maxperpage=100&query=domain%3asiteexplorer.info
http://api.siteexplorer.info/?auth=test&type=json&mask=333&maxperpage=100&query=http%3a%2f%2fsiteexplorer.info%2f
334 Backlinks from
special referring domain
http://api.siteexplorer.info/?auth=test&type=json&mask=334&domain=softlayer.com&query=domain%3asiteexplorer.info
http://api.siteexplorer.info/?auth=test&type=json&mask=334&domain=softlayer.com&query=http%3a%2f%2fsiteexplorer.info%2f
444 Just discovered
(new  Backlinks in 30 days)
http://api.siteexplorer.info/?auth=test&type=json&mask=444&maxperpage=100&query=domain%3asiteexplorer.info
http://api.siteexplorer.info/?auth=test&type=json&mask=444&maxperpage=100&query=http%3a%2f%2fsiteexplorer.info%2f
http://api.siteexplorer.info/?auth=test&type=json&mask=444&maxperpage=100&range=1&query=http%3a%2f%2fsiteexplorer.info%2f
http://api.siteexplorer.info/?auth=test&type=json&mask=444&maxperpage=100&range=2&query=http%3a%2f%2fsiteexplorer.info%2f
555 History Backlinks
(2013-2016)
http://api.siteexplorer.info/?auth=test&type=json&mask=555&maxperpage=100&query=domain%3asiteexplorer.info
http://api.siteexplorer.info/?auth=test&type=json&mask=555&maxperpage=100&query=http%3a%2f%2fsiteexplorer.info%2f
666 Top ranked backlinks
(max 1000)
order by page rank
http://api.siteexplorer.info/?auth=test&type=json&mask=666&maxperpage=100&query=domain%3asiteexplorer.info
http://api.siteexplorer.info/?auth=test&type=json&mask=666&maxperpage=100&query=http%3a%2f%2fsiteexplorer.info%2f
777 Top ranked URL filtered by keywords http://api.siteexplorer.info/?auth=test&type=json&mask=777&query=facebook
http://api.siteexplorer.info/?auth=test&type=json&mask=777&query=google
http://api.siteexplorer.info/?auth=test&type=json&mask=777&query=yahoo