diff --git a/build.gradle b/build.gradle
index 7e67858..0c04b5a 100644
--- a/build.gradle
+++ b/build.gradle
@@ -3,13 +3,15 @@
 buildscript {
     repositories {
         jcenter()
+//        google()
         maven {
             url 'https://maven.google.com/'
             name 'Google'
         }
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.1.2'
+        classpath "com.android.tools.build:gradle:3.1.1"
+ //       classpath 'com.android.tools.build:gradle:3.1.2'
         classpath "org.kt3k.gradle.plugin:coveralls-gradle-plugin:2.7.1"
 //        classpath 'org.robolectric:robolectric-gradle-plugin:1.1.0'
 //        classpath 'org.jacoco:org.jacoco.core:0.7.8'
diff --git a/lib/src/main/java/com/ibm/cloud/appid/android/api/AppIDAuthorizationManager.java b/lib/src/main/java/com/ibm/cloud/appid/android/api/AppIDAuthorizationManager.java
index 3d5676a..447f935 100644
--- a/lib/src/main/java/com/ibm/cloud/appid/android/api/AppIDAuthorizationManager.java
+++ b/lib/src/main/java/com/ibm/cloud/appid/android/api/AppIDAuthorizationManager.java
@@ -189,13 +189,12 @@ public AppIdentity getAppIdentity () {
 	 * log out
 	 * @param context
 	 * @param listener
-	 * currently just call to clearAuthorizationData()
 	 */
 	@Override
 	public void logout (Context context, ResponseListener listener) {
 		logger.debug("logout");
+		oAuthManager.getTokenManager().notifyLogout();
 		clearAuthorizationData();
-		// TODO: implement logout
 	}
 
 	public AccessToken getAccessToken () {
diff --git a/lib/src/main/java/com/ibm/cloud/appid/android/internal/tokenmanager/TokenManager.java b/lib/src/main/java/com/ibm/cloud/appid/android/internal/tokenmanager/TokenManager.java
index 3bb5cab..6045013 100644
--- a/lib/src/main/java/com/ibm/cloud/appid/android/internal/tokenmanager/TokenManager.java
+++ b/lib/src/main/java/com/ibm/cloud/appid/android/internal/tokenmanager/TokenManager.java
@@ -50,6 +50,8 @@
 import io.jsonwebtoken.IncorrectClaimException;
 import io.jsonwebtoken.Jwts;
 import io.jsonwebtoken.SignatureException;
+import okhttp3.MediaType;
+import okhttp3.RequestBody;
 
 public class TokenManager {
 
@@ -75,6 +77,12 @@ public class TokenManager {
 	private final static String ERROR_DESCRIPTION = "error_description";
 	private final static String ERROR = "error";
 	private final static String INVALID_GRANT = "invalid_grant";
+
+	private static final String OAUTH_ACTIVITY_LOGGING_PATH = "/activity_logging";
+	private static final String EVENT_NAME_KEY = "eventName";
+    private static final String ID_TOKEN_KEY = "id_token";
+	private static final String LOGOUT_ACTIVITY = "logout";
+
 	protected enum TOKENS {
 		ACCESS_TOKEN("access_token"),
 		ID_TOKEN("id_token"),
@@ -352,6 +360,46 @@ protected boolean verifyToken(Key rsaPublicKey, String token, String issuer, Str
 		}
 	}
 
+	private void sendLoggingRequest(AccessToken accessToken, IdentityToken idToken, String activity)
+	{
+		if (accessToken == null || idToken == null) {
+			logger.debug("No tokens found for sending logging request");
+			return;
+		}
+
+		RequestBody requestBody;
+		try {
+			JSONObject json = new JSONObject();
+			json.put(EVENT_NAME_KEY, activity);
+			json.put(ID_TOKEN_KEY, idToken.getRaw());
+			requestBody = RequestBody.create(MediaType.parse("application/json"), json.toString());
+		}
+		catch (JSONException err) { // shouldn't happen
+			logger.debug("Failed to create logging request");
+			return;
+		}
+
+		String url = Config.getOAuthServerUrl(appId) + OAUTH_ACTIVITY_LOGGING_PATH;
+
+		AppIDRequest request = new AppIDRequest(url, "POST");
+
+		ResponseListener resListener = new ResponseListener() {
+			@Override
+			public void onSuccess(Response response) {
+				logger.debug("logging request submitted OK");
+			}
+			@Override
+			public void onFailure(Response response, Throwable t, JSONObject extendedInfo) {
+				logger.error("Failed to submit logging request");
+			}
+		};
+		request.send (resListener, requestBody, accessToken);
+	}
+
+	public void notifyLogout(/*ResponseListener listener*/) {
+		sendLoggingRequest(latestAccessToken, latestIdentityToken, LOGOUT_ACTIVITY);
+	}
+
 	public AccessToken getLatestAccessToken () {
 		return latestAccessToken;
 	}