How to test this OAuth2 Service ------------------------------- 1. Open RestClient in FireFox or Chrome 2. Enter following URL in request URL box: http://localhost:8080/spring-oauth2-poc/public/login?email=e&password=p (This is to test whether public APIs are working fine or not) 3. You will get following response: {"userId":"sampleUserId","securityKey":"secretKey","clientId":"sampleClientId","clientSecret":"clientSecretKey"} 4. Then open another RestClient tab 5. Enter following URL to get OAuth2 Access Token: http://localhost:7080/spring-oauth2-poc/oauth/token?grant_type=password&scope=read write&username=sampleUserId&password=secretKey&clientId=sampleClientId&client_secret=clientSecretKey Param info: grant_type=password scope=read write username=sampleUserId password=secretKey clientId=sampleClientId client_secret=clientSecretKey 6. When you run, you will get following response (sample): {"access_token":"fc5bb50a-5f25-4b45-b2b7-b7196e2062db","token_type":"bearer","refresh_token":"cb3f6c77-6607-4372-90f4-0554b366b342","expires_in":43199,"scope":"read write"} 7. Now you can access private APIs using access_token. 8. Open another RestClient tab. 9. Enter this URL: http://localhost:7080/spring-oauth2-poc/private/profile?userId=1 You need to enter HEADER information in http request. Following is HEADER for OAuth2. Authorization : Bearer fc5bb50a-5f25-4b45-b2b7-b7196e2062db In the above header, the header name is 'Authorization' and value is 'Bearer fc5bb50a-5f25-4b45-b2b7-b7196e2062db'. 'fc5bb50a-5f25-4b45-b2b7-b7196e2062db' is the access_token returned by OAuth2 "/oauth/token" URL. 10. Now you run this request and you will get following response : {"userId":"dummyUserId","name":"dummyName","password":null,"dateOfBirth":1442201975029,"clientId":null,"clientSecret":null} **MY TOMCAT WAS RUNNING ON 'LOCALHOST' WITH PORT '7080'.