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by netaddict 5738 days ago
Earlier they did not offer custom URL shortening. goo.gl was used by Google services like Reader, YouTube but it was not open to public.
1 comments
albertzeyer 5738 days ago
Hm but with that Chrome extension, it worked. So I guess there was an open API already.
link
JeremyBanks 5738 days ago
The Chrome extension reverse-engineered the API from the Google toolbar, it wasn't officially released.
link