diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..48e341a
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,3 @@
+{
+  "lockfileVersion": 1
+}
diff --git a/zip-api/app.js b/zip-api/app.js
index df1f97b..3020796 100644
--- a/zip-api/app.js
+++ b/zip-api/app.js
@@ -1,29 +1,24 @@
-const express = require('express');
+const express = require("express");
 const app = express();
 
-const zipdb = require('./zipData');
+const zipdb = require("./zipData");
 
 const PORT = process.env.PORT || 8000;
 
-
-// console.log(zipdb.byCity);
-
-
-app.get('/', (req, res) => {
-  res.json({test: 'Yay'});
+app.get("/", (req, res) => {
+  res.json({ test: "Yay" });
 });
 
-
-app.get('/zip/:zipcode', (req, res) => {
-  // fill in...
+app.get("/zip/:zipcode", (req, res) => {
+  const zipcode = req.params.zipcode;
+  res.json(zipdb.byZip[zipcode]);
 });
 
-
-app.get('/city/:cityname', (req, res) => {
-  // fill in...
+app.get("/city/:cityname", (req, res) => {
+  const cityname = req.params.cityname;
+  res.json(zipdb.byCity[cityname]);
 });
 
-
 app.listen(PORT, () => {
   console.log(`zip-api is up and running on ${PORT}`);
 });
diff --git a/zip-api/package.json b/zip-api/package.json
index 631bb53..e65db88 100644
--- a/zip-api/package.json
+++ b/zip-api/package.json
@@ -4,7 +4,8 @@
   "description": "Simple API backend for CTP lecture.",
   "main": "app.js",
   "scripts": {
-    "start": "node app.js"
+    "start": "node app.js",
+    "dev": "nodemon app.js"
   },
   "author": "Edgardo Molina",
   "license": "ISC",