Can you think of any other method for doing the subdomain backlink search?  I posted the code above if you want to play with it.

Or for that matter anyone can try it out.

see below curl bash examples for Moz API:

#!/bin/bash

Usage: ./moz-test.sh callmydoc.com or ./moz-test.sh solimancare.schedulemypatient.com

Note: backlinks for subdomains does not return results yet.

access_id="mozscape-xx"
secret_key="xx"

searchurl=$1
echo "Checking backlinks for ["$searchurl"]"
endpoint="lsapi.seomoz.com"

timenow=$(date +%s)
timeend=$(( ${timenow} + (606024) ))
stringToSign=${access_id}$'\n'${timeend}
signature=$(echo -n "${stringToSign}" | openssl dgst -sha1 -hmac "${secret_key}" -binary | base64)
signature=$(echo ${signature} | sed 's/+/%2B/g;s/=/%3D/g')

start=0
end=300
echo "Checking for practices from $start to $end"
rm found_urls.txt
touch found_urls.txt
for (( i=$start; i<$end; i++ )); do
numberofdots=$(echo $searchurl | grep -o "." | wc -l)
echo "number of dots ["$numberofdots"]"
if [ "$numberofdots" == "1" ]; then
url="http://lsapi.seomoz.com/linkscape/links/$searchurl?AccessID=${access_id}&Expires=${timeend}&Signature=${signature}&Scope=page_to_domain&Filter=external&Sort=page_authority&SourceCols=4&TargetCols=4&LinkCols=4&Limit=25"

url2="http://lsapi.seomoz.com/linkscape/url-metrics/$searchurl?Cols=4&AccessID=${access_id}&Expires=${timeend}&Signature=${signature}"
echo "Calling Moz url-metrics API with ["$url2"]"
curl $url
echo
read -n 1 -p "Press any key to continue . . ."
echo
else
url="http://lsapi.seomoz.com/linkscape/links/$searchurl?AccessID=${access_id}&Expires=${timeend}&Signature=${signature}&Scope=page_to_subdomain&Filter=external&Sort=page_authority&SourceCols=4&TargetCols=4&LinkCols=4&Limit=25"
fi
echo "Calling Moz API with ["$url"]"
curl $url > backlink-results.json
echo
jq -r '.[].uu' < backlink-results.json >> found_urls.txt
read -n 1 -p "Press any key to continue . . ."
echo

sleep a random amount between 1 and 30 seconds to not crush moz API

sleep $[ ( $RANDOM % 50 ) + 1 ]s
(( i + 50 ))
done

got it!  really really appreciate your help!

so the call would be like: url="https://moz.com/researchtools/ose/links?site=$searchurl?AccessID=${access_id}&Expires=${timeend}&Signature=${signature}"?

so I would take the json returned from the http://lsapi.seomoz.com/linkscape/links call and feed it back into this to cross reference, corect?

jeez.  8-(  Ok, got it.  wow, sorry.  fixed.  Now: http://lsapi.seomoz.com/linkscape/links/solimancare.schedulemypatient.com?AccessID=mozscape-xx&Expires=xx&Signature=xx%3D&Scope=page_to_subdomain&Filter=external&Sort=page_authority&SourceCols=4&TargetCols=4&LinkCols=4&Limit=50&Offset=0

does not return anything, just [].  It should show at least one of cal.callmydoc.com, solimancare.com, shantiquesparoom.com

should I tune up the parameters to be more specific?

this is for my wife's practice: http://lsapi.seomoz.com/linkscape/links/solimancare.schedulemypatient.com?AccessID=mozscape-xx&Expires=xx&Signature=xx%3D&Scope=&Scope=page_to_subdomain&Filter=external&Sort=page_authority&SourceCols=4&TargetCols=4&LinkCols=4&Limit=50&Offset=0

returns:

{
"status" : "403",
"error_message" : "Permission denied: naieofimocidphjeoaifmdkkmllomolnnf"
}

all i did was change that one parameter but now i am getting:

{
"status" : "403",
"error_message" : "Permission denied: blepcoehcjeidmfpcleoaigbaahfafhgbo"
}

THIS IS AWESOME!  If i am checking a subdomain, like 10.billing.callmydoc.com, do I need to do something different?

As usual, I will repost my findings once completed.  8-)

in other words, does someone have an example of the API parameters for the backlink API call?

sweet!  thanks!  it works!  here is my example for anyone else:

#!/bin/bash
access_id="xxxxxxx"

secret_key="xxxxxxxxxxxxxx"

The number of external links to the URL, including nofollowed links

External links: 549755813888 ued

The number of external links to the subdomain, including nofollowed links

External links to subdomain: 140737488355328 fed

The number of external links to the root domain, including nofollowed links

External links to root domain: 2251799813685248 ped

searchurl=$1
echo "Checking backlinks for ["$searchurl"]"
endpoint="lsapi.seomoz.com"

call="/url-metrics/${searchurl}%2fCols=1073741825"

call="/url-metrics/${searchurl}%2fCols=549755813888"

timenow=$(date +%s)
timeend=$(( ${timenow} + (606024) ))
stringToSign=${access_id}$'\n'${timeend}
signature=$(echo -n "${stringToSign}" | openssl dgst -sha1 -hmac "${secret_key}" -binary | base64)
signature=$(echo ${signature} | sed 's/+/%2B/g;s/=/%3D/g')

http://lsapi.seomoz.com/linkscape/url-metrics/moz.com%2Fblog?Cols=4&AccessID=member-cf180f7081&Expires=1225138899&Signature=LmXYcPqc%2BkapNKzHzYz2BI4SXfC%3D

http://lsapi.seomoz.com/linkscape/url-metrics/moz.com%2FCols=1073741825?AccessID=mozscape-9d88c16268&Expires=1476310241&Signature=Nuy5h4bV5Gkyw5s2X09E9WJ3sGQ%3D

for i in {1..250}; do
curl "http://lsapi1.seomoz.com/linkscape/links/10.portal.athenahealth.com?Filter=external&SourceCols=133982846973&TargetCols=133982846973&Sort=page_authority&AccessID=${access_id}&Expires=${timeend}&Signature=${signature}&Scope=page_to_domain&Limit=5&Offset=$((i100))&"
done

| tr "}" "n" | perl -pe "s/[][]//g" | perl -pe "s/,{//g" | perl -pe "s/"[^"]"://g" | perl -pe "s/^{//g" >> output.csv

url="http://$endpoint/linkscape$call?AccessID=${access_id}&Expires=${timeend}&Signature=${signature}"
echo "Calling Moz API with ["$url"]"
curl $url
echo