diff --git a/controllers/index.js b/controllers/index.js
index dd72ff8..97b32fb 100644
--- a/controllers/index.js
+++ b/controllers/index.js
@@ -6,6 +6,7 @@ const serverMethods = require('../helpers/server-methods');
 const slack = require('../helpers/slack');
 const resetScript = require('../scripts/reset');
 const logger = require('../helpers/logger');
+const { serverErrorResponse } = require('../responses');
 
 const { app: appConfig } = require('../config');
 
@@ -93,8 +94,7 @@ module.exports = {
         data: playlist,
       });
     } catch (err) {
-      logger.error(err);
-      return res.status(500).send({ message: 'An error occurred' });
+      return serverErrorResponse(res, err);
     }
   },
 
diff --git a/controllers/notFound.js b/controllers/notFound.js
new file mode 100644
index 0000000..e8b03e7
--- /dev/null
+++ b/controllers/notFound.js
@@ -0,0 +1,10 @@
+const { clientErrorResponse } = require('../responses');
+
+/**
+ * Controller for handling routes that don't exist
+ * @param {*} req
+ * @param {*} res
+ */
+const notFound = (req, res) => clientErrorResponse(res, 400, 'This route doesn\'t exist yet');
+
+module.exports = notFound;
diff --git a/controllers/playlist.js b/controllers/playlist.js
index af20ea2..7c72e00 100644
--- a/controllers/playlist.js
+++ b/controllers/playlist.js
@@ -1,38 +1,38 @@
 const spotify = require('../helpers/spotify');
-const logger = require('../helpers/logger');
+const {
+  successResponse,
+  clientErrorResponse,
+  serverErrorResponse,
+} = require('../responses');
 
 module.exports = {
 
+  /**
+   * Retrieve a single playlist
+   */
   getPlaylistByID: async (req, res) => {
     try {
       const { id } = req.params;
 
       const playlist = await spotify.findPlaylist(id);
       if (!playlist) {
-        return res.status(404).send({
-          status: false,
-          message: 'Playlist not found',
-        });
+        return clientErrorResponse(res, 404, 'Playlist not found');
       }
-      return res.status(200).send({
-        status: true,
-        data: playlist,
-      });
+      return successResponse(res, 200, 'Playlist retrieved', playlist);
     } catch (err) {
-      logger.error(err);
-      return res.status(500).send({ status: false, message: 'An error occurred' });
+      return serverErrorResponse(res, err);
     }
   },
 
+  /**
+   * Retrieve all playlists
+   */
   getAllPlaylists: async (req, res) => {
     try {
       const playlists = await spotify.findAllPlaylists();
-      return res.status(200).send({
-        status: true,
-        data: playlists,
-      });
+      return successResponse(res, 200, 'Playlists retrieved', playlists);
     } catch (err) {
-      return res.status(500).send({ status: false, message: 'An error occurred' });
+      return serverErrorResponse(res, err);
     }
   },
 };
diff --git a/controllers/track.js b/controllers/track.js
index 63dc3c0..39d7532 100644
--- a/controllers/track.js
+++ b/controllers/track.js
@@ -1,21 +1,24 @@
 const spotify = require('../helpers/spotify');
-const logger = require('../helpers/logger');
+const {
+  successResponse,
+  clientErrorResponse,
+  serverErrorResponse,
+} = require('../responses');
 
 module.exports = {
 
+  /**
+   * Get track audio features
+   */
   getTrackAudioFeatures: async (req, res) => {
     try {
       const tracks = await spotify.findTracksWithoutAnalytics();
       if (!tracks.length) return res.status(200).send({ status: true, message: 'All tracks have their analytics set' });
       await spotify.performAuthentication();
       spotify.getAudioAnalyticsForTracks(tracks);
-      return res.status(200).send({
-        status: true,
-        message: 'Populating analytics...',
-      });
+      return successResponse(res, 200, 'Populating analytics...');
     } catch (err) {
-      logger.error(err);
-      return res.status(500).send({ message: 'An error occurred' });
+      return serverErrorResponse(res, err);
     }
   },
 
@@ -24,35 +27,31 @@ module.exports = {
       const tracks = await spotify.findTracksWithoutPreview();
       if (!tracks.length) return res.status(200).send({ status: true, message: 'All tracks have their previews set' });
       await spotify.performAuthentication();
+
       await spotify.getPreviewUrlForTracks(tracks);
-      return res.status(200).send({
-        status: true,
-        message: 'Previews have been populated.',
-      });
+      return successResponse(res, 200, 'Previews have been populated');
     } catch (err) {
-      logger.error(err);
-      return res.status(500).send({ message: 'An error occurred' });
+      return serverErrorResponse(res, err);
     }
   },
 
+  /**
+   * Get track data
+   */
   getTrackData: async (req, res) => {
     try {
       const { track_ids: ids } = req.body;
 
       const result = await spotify.performAuthentication();
       if (result && result.code === 401) {
-        return res.status(401).send({ message: result.message });
+        return clientErrorResponse(res, result.code, result.message);
       }
 
       const data = await spotify.getTrackData(ids);
 
-      return res.status(200).send({
-        status: true,
-        data,
-      });
+      return successResponse(res, 200, 'Track data retrieved', data);
     } catch (err) {
-      logger.error(err);
-      return res.status(500).send({ message: 'An error occurred' });
+      return serverErrorResponse(res, err);
     }
   },
 };
diff --git a/responses/index.js b/responses/index.js
new file mode 100644
index 0000000..a1da96a
--- /dev/null
+++ b/responses/index.js
@@ -0,0 +1,41 @@
+const logger = require('../helpers/logger');
+const slack = require('../helpers/slack');
+
+/**
+ * Handler for success responses
+ * @param {Object} res
+ * @param {Number} code
+ * @param {String} message
+ * @param {Array|Object} data
+ */
+const successResponse = (res, code, message, data) => (
+  res.status(code).send({ success: true, message, data })
+);
+
+/**
+ * Method to return client error responses
+ * @param {Object} res
+ * @param {Number} code
+ * @param {String} message
+ */
+const clientErrorResponse = (res, code, message) => (
+  res.status(code).send({ success: false, message })
+);
+
+/**
+ * Method to return 5xx errors
+ * @param {Object} res
+ * @param {Object} error
+ * @param {Number} code
+ */
+const serverErrorResponse = (res, error, code = 500) => {
+  logger.error(error);
+  slack.sendMonitorMessage(error);
+  return res.status(code).send({ success: false, message: 'An error occurred' });
+};
+
+module.exports = {
+  successResponse,
+  clientErrorResponse,
+  serverErrorResponse,
+};
diff --git a/routes/notFound.js b/routes/notFound.js
new file mode 100644
index 0000000..e34846f
--- /dev/null
+++ b/routes/notFound.js
@@ -0,0 +1,9 @@
+const express = require('express');
+
+const router = express.Router();
+
+const notFound = require('../controllers/notFound');
+
+router.get('/', notFound);
+
+module.exports = router;
diff --git a/server.js b/server.js
index f3c043c..2748132 100644
--- a/server.js
+++ b/server.js
@@ -14,6 +14,7 @@ const logger = require('./helpers/logger');
 const indexRouter = require('./routes/index');
 const playlistRouter = require('./routes/playlists');
 const trackRouter = require('./routes/track');
+const notFoundRouter = require('./routes/notFound');
 
 require('./config/db');
 
@@ -26,6 +27,7 @@ app.disable('x-powered-by');
 app.use('/', indexRouter);
 app.use('/playlists', playlistRouter);
 app.use('/track', trackRouter);
+app.use('*', notFoundRouter);
 
 // listen for requests :)
 const listener = app.listen(appConfig.port, () => {