Authenticator.setDefault(new Authenticator() { protected PasswordAuthentication getPasswordAuthentication() { return new PasswordAuthentication("username", "password".toCharArray()); } }); URL url = new URL("http://example.com/"); HttpURLConnection connection = (HttpURLConnection) url.openConnection(); connection.setRequestProperty("Authorization", "Digest username=\"user\", realm=\"example.com\", nonce=\"123456\""); OAuth10aService service = new ServiceBuilder(clientId) .apiSecret(clientSecret) .build(new OAuth10aApi(authorizeUrl, accessTokenUrl)); Token accessToken = service.getAccessToken(requestToken, verifier); OAuthService service = new ServiceBuilder(clientId) .apiSecret(clientSecret) .build(new OAuthApi(authorizeUrl, accessTokenUrl)); Token accessToken = service.getAccessToken(requestToken, verifier);