diff --git a/lib/config.ts b/lib/config.ts
index 61feccf..4e361f2 100644
--- a/lib/config.ts
+++ b/lib/config.ts
@@ -1,7 +1,6 @@
 import { process591QueryUrl } from "./591House/utils";
 
 const apiSecret = process.env.ZUZUGO_API_SECRET;
-
 const tokenLine = process.env.LINE_API_TOKEN;
 
 // const isSubwayStationFilterEnabled = process.env.ENABLE_SUBWAY_STATION_FILTER === "true";
@@ -34,4 +33,9 @@ export const config = {
   tokenLine,
   production: process.env.NODE_ENV === "production",
   cronEnabled: process.env.DISABLE_CRON !== "true",
+
+  line: {
+    LINE_ACCESS_TOKEN: process.env.LINE_ACCESS_TOKEN,
+    LINE_CHANNEL_SECRET: process.env.LINE_CHANNEL_SECRET
+  }
 };
diff --git a/lib/notification/lineBot.ts b/lib/notification/lineBot.ts
new file mode 100644
index 0000000..3aff704
--- /dev/null
+++ b/lib/notification/lineBot.ts
@@ -0,0 +1,19 @@
+import { Client, TextMessage } from '@line/bot-sdk';
+
+import { config } from 'lib/config'
+// set Channel Access Token and Channel Secret for Line Bot 
+const client = new Client({
+  channelAccessToken: config.line.LINE_ACCESS_TOKEN || '',
+  channelSecret: config.line.LINE_CHANNEL_SECRET,
+});
+
+// @todo: pass rent data from api.
+const message: TextMessage = {
+  type: 'text',
+  text: 'Zuzugo got a new house!',
+};
+
+// @todo: get groupId from database.
+export default async function sendLineBotMessage(groupId: string) {
+  await client.pushMessage(groupId, message)
+}
\ No newline at end of file
diff --git a/package.json b/package.json
index 7f30e3c..1fe13c8 100644
--- a/package.json
+++ b/package.json
@@ -15,6 +15,7 @@
   },
   "dependencies": {
     "@next-auth/prisma-adapter": "^1.0.5",
+    "@line/bot-sdk": "^7.5.2",
     "@next/font": "13.1.6",
     "@prisma/client": "^4.10.1",
     "@seratch_/bolt-http-runner": "^1.0.3",
@@ -66,4 +67,4 @@
   "engines": {
     "node": ">=18.12"
   }
-}
+}
\ No newline at end of file
diff --git a/pages/api/line/events.ts b/pages/api/line/events.ts
new file mode 100644
index 0000000..4109d76
--- /dev/null
+++ b/pages/api/line/events.ts
@@ -0,0 +1,35 @@
+import { WebhookEvent, User, Group, Room } from "@line/bot-sdk";
+import type { NextApiRequest, NextApiResponse } from "next";
+
+import sendLineBotMessage from 'lib/notification/lineBot'
+
+
+export default async function handler(req: NextApiRequest, res: NextApiResponse) {
+
+  if (req.method !== "POST") {
+    res.status(405).json({ error: "Sorry! This endpoint does not accept your requests." });
+    return;
+  }
+
+  const events: WebhookEvent[] = req.body.events;
+  const [firstEvent] = events;
+
+  if (firstEvent.type === 'join') {
+    const {
+      userId = '',
+      groupId = '',
+      roomId = '',
+      // @todo: save chatType to database.
+      // type: chatType,
+    } = firstEvent.source as User & Group & Room;
+
+    const chatId = userId || groupId || roomId;
+    try {
+      await sendLineBotMessage(chatId)
+    } catch (e) {
+      console.error(e)
+    }
+  }
+
+  res.send(200)
+}
\ No newline at end of file
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 2c5d53c..17b88bc 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -7,6 +7,7 @@ patchedDependencies:
 
 specifiers:
   '@faker-js/faker': ^7.6.0
+  '@line/bot-sdk': ^7.5.2
   '@next-auth/prisma-adapter': ^1.0.5
   '@next/font': 13.1.6
   '@prisma/client': ^4.10.1
@@ -49,6 +50,7 @@ specifiers:
   zod: ^3.20.6
 
 dependencies:
+  '@line/bot-sdk': 7.5.2
   '@next-auth/prisma-adapter': 1.0.5_qpmskah7lm3ildf4stmwh4q42u
   '@next/font': 13.1.6
   '@prisma/client': 4.10.1_prisma@4.10.1
@@ -761,6 +763,21 @@ packages:
       '@jridgewell/sourcemap-codec': 1.4.14
     dev: true
 
+  /@line/bot-sdk/7.5.2:
+    resolution: {integrity: sha512-mMaDnr+mOqQDLYJcUp+fQwZklg/LoOZzNILlWdsj2IFD2nXF+HhAm3KEy5tyUx629Y2bCx6nv9Jl0UlMwBiAiw==}
+    engines: {node: '>=10'}
+    dependencies:
+      '@types/body-parser': 1.19.2
+      '@types/node': 16.18.13
+      axios: 0.27.2
+      body-parser: 1.20.1
+      file-type: 16.5.4
+      form-data: 4.0.0
+    transitivePeerDependencies:
+      - debug
+      - supports-color
+    dev: false
+
   /@mswjs/cookies/0.2.2:
     resolution: {integrity: sha512-mlN83YSrcFgk7Dm1Mys40DLssI1KdJji2CMKN8eOlBqsTADYzj2+jWzsANsUTFbxDMWPD5e9bfA1RGqBpS3O1g==}
     engines: {node: '>=14'}
@@ -769,8 +786,8 @@ packages:
       set-cookie-parser: 2.5.1
     dev: true
 
-  /@mswjs/interceptors/0.17.8:
-    resolution: {integrity: sha512-hjS5dy8u+Baa5r/SVAQyWZYQr8YZzpeGldNXJlZQBPjt7FQL7Acd1BnXJWmIhl62s5uh0WJNAcUMfAAcnqTchA==}
+  /@mswjs/interceptors/0.17.9:
+    resolution: {integrity: sha512-4LVGt03RobMH/7ZrbHqRxQrS9cc2uh+iNKSj8UWr8M26A2i793ju+csaB5zaqYltqJmA2jUq4VeYfKmVqvsXQg==}
     engines: {node: '>=14'}
     dependencies:
       '@open-draft/until': 1.0.3
@@ -1175,6 +1192,10 @@ packages:
       defer-to-connect: 2.0.1
     dev: false
 
+  /@tokenizer/token/0.3.0:
+    resolution: {integrity: sha512-OvjF+z51L3ov0OyAU0duzsYuvO01PH7x4t6DJx+guahgTnBHkhJdG7soQeTSFLWN3efnHyibZ4Z8l2EuWwJN3A==}
+    dev: false
+
   /@total-typescript/ts-reset/0.3.7:
     resolution: {integrity: sha512-yXt2BRRVCJVvzWaxac5n0nCXzIrQEBE/MeYlNQ8/Iq7UeelNmm/AdnUAu18ilSS893mbEQ4u6whPt/HvOPc4rw==}
     dev: true
@@ -1329,6 +1350,10 @@ packages:
     resolution: {integrity: sha512-iiUgKzV9AuaEkZqkOLDIvlQiL6ltuZd9tGcW3gwpnX8JbuiuhFlEGmmFXEXkN50Cvq7Os88IY2v0dkDqXYWVgA==}
     dev: true
 
+  /@types/node/16.18.13:
+    resolution: {integrity: sha512-l0/3XZ153UTlNOnZK8xSNoJlQda9/WnYgiTdcKKPJSZjdjI9MU+A9oMXOesAWLSnqAaaJhj3qfQsU07Dr8OUwg==}
+    dev: false
+
   /@types/node/17.0.45:
     resolution: {integrity: sha512-w+tIMs3rq2afQdsPJlODhoUEKzFP1ayaoyl1CcnwtIlsVe7K7bA1NGm4s3PraqTLlXnbIN84zuBlxBWo1u9BLw==}
     dev: false
@@ -3098,6 +3123,15 @@ packages:
     dependencies:
       flat-cache: 3.0.4
 
+  /file-type/16.5.4:
+    resolution: {integrity: sha512-/yFHK0aGjFEgDJjEKP0pWCplsPFPhwyfwevf/pVxiN0tmE4L9LmwWxWukdJSHdoCli4VgQLehjJtwQBnqmsKcw==}
+    engines: {node: '>=10'}
+    dependencies:
+      readable-web-to-node-stream: 3.0.2
+      strtok3: 6.3.0
+      token-types: 4.2.1
+    dev: false
+
   /fill-range/7.0.1:
     resolution: {integrity: sha512-qOo9F+dMUmC2Lcb4BbVvnKJxTPjCm+RRpe4gDuGrzkL7mEVl/djYSu2OdQ2Pa302N4oqkSg9ir6jaLWJ2USVpQ==}
     engines: {node: '>=8'}
@@ -4629,7 +4663,7 @@ packages:
         optional: true
     dependencies:
       '@mswjs/cookies': 0.2.2
-      '@mswjs/interceptors': 0.17.8
+      '@mswjs/interceptors': 0.17.9
       '@open-draft/until': 1.0.3
       '@types/cookie': 0.4.1
       '@types/js-levenshtein': 1.1.1
@@ -5065,6 +5099,11 @@ packages:
     resolution: {integrity: sha512-gDKb8aZMDeD/tZWs9P6+q0J9Mwkdl6xMV8TjnGP3qJVJ06bdMgkbBlLU8IdfOsIsFz2BW1rNVT3XuNEl8zPAvw==}
     engines: {node: '>=8'}
 
+  /peek-readable/4.1.0:
+    resolution: {integrity: sha512-ZI3LnwUv5nOGbQzD9c2iDG6toheuXSZP5esSHBjopsXH4dg19soufvpUGA3uohi5anFtGb2lhAVdHzH6R/Evvg==}
+    engines: {node: '>=8'}
+    dev: false
+
   /picocolors/1.0.0:
     resolution: {integrity: sha512-1fygroTLlHu66zi26VoTDv8yRgm0Fccecssto+MhsZ0D/DGW2sm8E8AjW7NU5VVTRt5GxbeZ5qBuJr+HyLYkjQ==}
 
@@ -5280,7 +5319,13 @@ packages:
       inherits: 2.0.4
       string_decoder: 1.1.1
       util-deprecate: 1.0.2
-    dev: true
+
+  /readable-web-to-node-stream/3.0.2:
+    resolution: {integrity: sha512-ePeK6cc1EcKLEhJFt/AebMCLL+GgSKhuygrZ/GLaKZYEecIgIECf4UaUuaByiGtzckwR4ain9VzUh95T1exYGw==}
+    engines: {node: '>=8'}
+    dependencies:
+      readable-stream: 3.6.1
+    dev: false
 
   /readdirp/3.6.0:
     resolution: {integrity: sha512-hOS089on8RduqdbhvQ5Z37A0ESjsqz6qnRcffsMU3495FuTdqSm+7bhJ29JvIOsBDEEnan5DPu9t3To9VRlMzA==}
@@ -5410,7 +5455,6 @@ packages:
 
   /safe-buffer/5.1.2:
     resolution: {integrity: sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g==}
-    dev: true
 
   /safe-buffer/5.2.1:
     resolution: {integrity: sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ==}
@@ -5628,7 +5672,6 @@ packages:
     resolution: {integrity: sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==}
     dependencies:
       safe-buffer: 5.1.2
-    dev: true
 
   /strip-ansi/6.0.1:
     resolution: {integrity: sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==}
@@ -5654,6 +5697,14 @@ packages:
     resolution: {integrity: sha512-6fPc+R4ihwqP6N/aIv2f1gMH8lOVtWQHoqC4yK6oSDVVocumAsfCqjkXnqiYMhmMwS/mEHLp7Vehlt3ql6lEig==}
     engines: {node: '>=8'}
 
+  /strtok3/6.3.0:
+    resolution: {integrity: sha512-fZtbhtvI9I48xDSywd/somNqgUHl2L2cstmXCCif0itOf96jeW18MBSyrLuNicYQVkvpOxkZtkzujiTJ9LW5Jw==}
+    engines: {node: '>=10'}
+    dependencies:
+      '@tokenizer/token': 0.3.0
+      peek-readable: 4.1.0
+    dev: false
+
   /styled-jsx/5.1.1_react@18.2.0:
     resolution: {integrity: sha512-pW7uC1l4mBZ8ugbiZrcIsiIvVx1UmTfw7UkC3Um2tmfUq9Bhk8IiyEIPl6F8agHgjzku6j0xQEZbfA5uSgSaCw==}
     engines: {node: '>= 12.0.0'}
@@ -5770,6 +5821,14 @@ packages:
     engines: {node: '>=0.6'}
     dev: false
 
+  /token-types/4.2.1:
+    resolution: {integrity: sha512-6udB24Q737UD/SDsKAHI9FCRP7Bqc9D/MQUV02ORQg5iskjtLJlZJNdN4kKtcdtwCeWIwIHDGaUsTsCCAa8sFQ==}
+    engines: {node: '>=10'}
+    dependencies:
+      '@tokenizer/token': 0.3.0
+      ieee754: 1.2.1
+    dev: false
+
   /tough-cookie/4.1.2:
     resolution: {integrity: sha512-G9fqXWoYFZgTc2z8Q5zaHy/vJMjm+WV0AkAeHxVCQiEB1b+dGvWzFW6QV07cY5jQ5gRkeid2qIkzkxUnmoQZUQ==}
     engines: {node: '>=6'}
@@ -5995,7 +6054,6 @@ packages:
 
   /util-deprecate/1.0.2:
     resolution: {integrity: sha512-EPD5q1uXyFxJpCrLnCc1nHnq3gOa6DZBocAIiI2TaSCA7VCJ1UJDMagCzIkXNsUYfD1daK//LTEQ8xiIbrHtcw==}
-    dev: true
 
   /util/0.12.5:
     resolution: {integrity: sha512-kZf/K6hEIrWHI6XqOFUiiMa+79wE/D8Q+NCNAWclkyg3b4d2k7s0QGepNjiABc+aR3N1PAyHL7p6UcLY6LmrnA==}