[1] Bitly API Documentation (2014-11-01 00:33:47 +09:00 版) http://dev.bitly.com/authentication.html

ApiKey authentication
deprecated - ApiKey authentication is deprecated in favor of OAuth requests.
API requests to endpoints that accept a login and apiKey may be made to http://api.bitly.com/ or https://api-ssl.bitly.com/.
Note that, for some accounts created via Twitter or Facebook, the account login is different from the display name. To find your canonical account login, please visit http://bitly.com/a/your_api_key.
login=**login**&apiKey=**apiKey**