diff --git a/packages/core/src/car.ts b/packages/core/src/car.ts
new file mode 100644
index 0000000..9c609e8
--- /dev/null
+++ b/packages/core/src/car.ts
@@ -0,0 +1,58 @@
+export * as Car from "./car";
+import fetch from "node-fetch";
+import fs from "fs";
+import AdmZip from "adm-zip";
+import * as d3 from "d3";
+import { Car } from "./types";
+import { FUEL_TYPE } from "./config";
+import { sortByMake } from "./lib/sortByMake";
+
+export const list = async () => {
+  const tempDir: string = "/tmp";
+  const zipFileName: string = `Monthly New Registration of Cars by Make.zip`;
+  const zipFilePath: string = `${tempDir}/${zipFileName}`;
+  const csvFileName: string = `M03-Car_Regn_by_make.csv`;
+  const csvFilePath: string = `${tempDir}/${csvFileName}`;
+  const zipUrl: string = `https://datamall.lta.gov.sg/content/dam/datamall/datasets/Facts_Figures/Vehicle Registration/${zipFileName}`;
+
+  const response = await fetch(zipUrl);
+  if (!response.ok) {
+    throw new Error(`Failed to download the ZIP file: ${response.statusText}`);
+  }
+  const data = await response.buffer();
+  fs.writeFileSync(zipFilePath, data);
+
+  const zip = new AdmZip(zipFilePath);
+  zip.extractAllTo(`${tempDir}`, true);
+
+  const csvData = fs.readFileSync(csvFilePath, "utf-8");
+  const parsedData = d3.csvParse(csvData);
+
+  const electricCars: Car[] = parsedData
+    .filter(
+      ({ fuel_type, number }) =>
+        fuel_type === FUEL_TYPE.ELECTRIC && +number !== 0,
+    )
+    .reduce((result: Car[], { month, make, fuel_type, number }) => {
+      const existingCar = result.find(
+        (car) => car.month === month && car.make === make,
+      );
+
+      if (existingCar) {
+        existingCar.number += Number(number);
+      } else {
+        result.push({
+          month,
+          make,
+          fuel_type,
+          number: Number(number),
+        });
+      }
+
+      return result;
+    }, [])
+    .map((car) => ({ ...car, number: +car.number }))
+    .sort(sortByMake);
+
+  return electricCars;
+};
diff --git a/packages/functions/src/config/index.ts b/packages/core/src/config/index.ts
similarity index 100%
rename from packages/functions/src/config/index.ts
rename to packages/core/src/config/index.ts
diff --git a/packages/functions/src/lib/sortByMake.ts b/packages/core/src/lib/sortByMake.ts
similarity index 100%
rename from packages/functions/src/lib/sortByMake.ts
rename to packages/core/src/lib/sortByMake.ts
diff --git a/packages/functions/src/types/index.ts b/packages/core/src/types/index.ts
similarity index 100%
rename from packages/functions/src/types/index.ts
rename to packages/core/src/types/index.ts
diff --git a/packages/functions/src/car.ts b/packages/functions/src/car.ts
new file mode 100644
index 0000000..1b66a58
--- /dev/null
+++ b/packages/functions/src/car.ts
@@ -0,0 +1,7 @@
+import { ApiHandler } from "sst/node/api";
+import { Car } from "@lta-datasets-updater/core/car";
+
+export const list = ApiHandler(async (_evt) => ({
+  statusCode: 200,
+  body: JSON.stringify(await Car.list()),
+}));
diff --git a/packages/functions/src/lambda.ts b/packages/functions/src/lambda.ts
deleted file mode 100644
index 3988765..0000000
--- a/packages/functions/src/lambda.ts
+++ /dev/null
@@ -1,73 +0,0 @@
-import { ApiHandler } from "sst/node/api";
-import fs from "fs";
-import fetch from "node-fetch";
-import * as d3 from "d3";
-import AdmZip from "adm-zip";
-import { FUEL_TYPE } from "./config";
-import { sortByMake } from "./lib/sortByMake";
-import type { Car } from "./types";
-
-export const handler = ApiHandler(async (_evt) => {
-  const tempDir: string = "/tmp";
-  const zipFileName: string = `Monthly New Registration of Cars by Make.zip`;
-  const zipFilePath: string = `${tempDir}/${zipFileName}`;
-  const csvFileName: string = `M03-Car_Regn_by_make.csv`;
-  const csvFilePath: string = `${tempDir}/${csvFileName}`;
-  const zipUrl: string = `https://datamall.lta.gov.sg/content/dam/datamall/datasets/Facts_Figures/Vehicle Registration/${zipFileName}`;
-
-  try {
-    const response = await fetch(zipUrl);
-    if (!response.ok) {
-      throw new Error(
-        `Failed to download the ZIP file: ${response.statusText}`,
-      );
-    }
-    const data = await response.buffer();
-    fs.writeFileSync(zipFilePath, data);
-
-    const zip = new AdmZip(zipFilePath);
-    zip.extractAllTo(`${tempDir}`, true);
-
-    const csvData = fs.readFileSync(csvFilePath, "utf-8");
-    const parsedData = d3.csvParse(csvData);
-
-    const electricCars: Car[] = parsedData
-      .filter(
-        ({ fuel_type, number }) =>
-          fuel_type === FUEL_TYPE.ELECTRIC && +number !== 0,
-      )
-      .reduce((result: Car[], { month, make, fuel_type, number }) => {
-        const existingCar = result.find(
-          (car) => car.month === month && car.make === make,
-        );
-
-        if (existingCar) {
-          existingCar.number += Number(number);
-        } else {
-          result.push({
-            month,
-            make,
-            fuel_type,
-            number: Number(number),
-          });
-        }
-
-        return result;
-      }, [])
-      .map((car) => ({ ...car, number: +car.number }))
-      .sort(sortByMake);
-
-    console.table(electricCars);
-
-    return {
-      statusCode: 200,
-      body: JSON.stringify(electricCars),
-    };
-  } catch (error) {
-    console.error(error);
-    return {
-      statusCode: 500,
-      body: "Error occurred while processing the ZIP file.",
-    };
-  }
-});
diff --git a/stacks/MyStack.ts b/stacks/MyStack.ts
index 349b3f0..9e3e978 100644
--- a/stacks/MyStack.ts
+++ b/stacks/MyStack.ts
@@ -1,5 +1,16 @@
 import { StackContext, Api, EventBus } from "sst/constructs";
 
+const CUSTOM_DOMAINS: Record<string, any> = {
+  dev: {
+    domainName: "dev.api.singapore-ev-trends.ruchern.xyz",
+    hostedZone: "ruchern.xyz",
+  },
+  prod: {
+    domainName: "api.singapore-ev-trends.ruchern.xyz",
+    hostedZone: "ruchern.xyz",
+  },
+};
+
 export const api = ({ stack }: StackContext) => {
   const bus = new EventBus(stack, "bus", {
     defaults: {
@@ -14,15 +25,12 @@ export const api = ({ stack }: StackContext) => {
         bind: [bus],
       },
     },
-    customDomain: {
-      domainName: "api.singapore-ev-trends.ruchern.xyz",
-      hostedZone: "ruchern.xyz",
-    },
+    customDomain: CUSTOM_DOMAINS[stack.stage],
     cors: {
       allowOrigins: ["https://singapore-ev-trends.ruchern.xyz"],
     },
     routes: {
-      "GET /": "packages/functions/src/lambda.handler",
+      "GET /": "packages/functions/src/car.list",
       "GET /todo": "packages/functions/src/todo.list",
       "POST /todo": "packages/functions/src/todo.create",
     },