search for feeds in directory:
https://www.google.com/reader/directory/search?q=%22http%3A%2F%2Fblah%22

quickadd- use this for website -> feed sub
success:
<script type="text/javascript">parent._FR_QuickAdd_success('http://example.com/blog/','feed/http://exampley.com/blog/atom.xml');
failure:
<script type="text/javascript">parent._FR_QuickAdd_moreResults('\042http://example.com\042');
</script>

Import subscriptions as OPML:

POST /reader/subscriptions/import HTTP/1.1
Content-Type: multipart/form-data; boundary=---------------------------12345
Content-Length: $len
-----------------------------12345
Content-Disposition: form-data; name="T"

$token
-----------------------------12345
Content-Disposition: form-data; name="action"

opml-upload
-----------------------------12345

Content-Disposition: form-data; name="opml-file"; filename="$filename"
Content-Type: text/xml

$opml