diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 9fba45e..1fe0a3f 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -2,6 +2,13 @@ name: Pipeline
 
 on: [push]
 
+env:
+  POSTGRES_DATABASE: ${{ secrets.POSTGRES_DATABASE }}
+  POSTGRES_USERNAME: ${{ secrets.POSTGRES_USERNAME }}
+  POSTGRES_PASSWORD: ${{ secrets.POSTGRES_PASSWORD }}
+  POSTGRES_HOST: ${{ secrets.POSTGRES_HOST }}
+  POSTGRES_PORT: ${{ secrets.POSTGRES_PORT }}
+
 jobs:
   lint:
     runs-on: ubuntu-latest
@@ -32,12 +39,27 @@ jobs:
       - run: yarn audit
   test:
     runs-on: ubuntu-latest
+    services:
+      postgres:
+        image: postgres:15.3
+        env:
+          POSTGRES_USER: ${{ env.POSTGRES_USERNAME }}
+          POSTGRES_PASSWORD: ${{ env.POSTGRES_PASSWORD }}
+          POSTGRES_DB: ${{ env.POSTGRES_DATABASE }}
+        ports:
+        - 5432:5432
+        options: --health-cmd pg_isready --health-interval 10s --health-timeout 5s --health-retries 5
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
         with:
           node-version: 18
+      - env:
+          DATABASE_URL: postgres://${{ secrets.POSTGRES_USERNAME }}:${{ secrets.POSTGRES_PASSWORD }}@${{ secrets.POSTGRES_HOST }}:${{ secrets.POSTGRES_PORT }}/${{ secrets.POSTGRES_DATABASE }}
+        run: |
+          echo "DATABASE_URL=${DATABASE_URL}" > .env
       - run: yarn
+      - run: yarn db:migrate
       - run: yarn test
   build:
     runs-on: ubuntu-latest
diff --git a/.gitignore b/.gitignore
index 2364e6c..10da212 100644
--- a/.gitignore
+++ b/.gitignore
@@ -131,3 +131,4 @@ dist
 
 # Custom
 build
+.env
diff --git a/README.md b/README.md
index afcdaa0..e44f8a6 100644
--- a/README.md
+++ b/README.md
@@ -10,6 +10,11 @@ It contains basic configurations for the following:
 - Winston (logging)
 - GitHub Actions (CI/CD)
 
+# Environment Variables
+
+- PORT - The port to run the server on
+- `DATABASE_URL` - The URL to the database, formatted as `postgres://<username>:<password>@<host>:<port>/<database>`
+
 ## Commands
 
 Install dependencies:
diff --git a/jest.config.ts b/jest.config.ts
index e984a02..2b270f2 100644
--- a/jest.config.ts
+++ b/jest.config.ts
@@ -10,7 +10,8 @@ const config: Config = {
   testMatch: ['**/*.test.ts'],
   transform: {
     '^.+\\.ts$': '@swc/jest'
-  }
+  },
+  setupFilesAfterEnv: ['./src/utils/clearDatabase.ts']
 };
 
 export default config;
diff --git a/package.json b/package.json
index db5971c..4152750 100644
--- a/package.json
+++ b/package.json
@@ -13,7 +13,10 @@
     "typecheck": "tsc",
     "format": "prettier --config .prettierrc 'src/**/*.ts' --write",
     "test": "jest --runInBand --detectOpenHandles",
-    "prepare": "husky install"
+    "prepare": "husky install",
+    "db:generate": "prisma generate",
+    "db:migrate": "prisma migrate deploy",
+    "db:reset": "prisma migrate reset --force"
   },
   "lint-staged": {
     "*.ts": [
@@ -24,11 +27,14 @@
     ]
   },
   "dependencies": {
+    "@prisma/client": "5.1.1",
     "body-parser": "^1.20.2",
     "cors": "^2.8.5",
+    "crypto": "^1.0.1",
     "express": "^4.18.2",
     "helmet": "^7.0.0",
     "jsonschema": "^1.4.1",
+    "prisma": "^5.1.1",
     "winston": "^3.10.0",
     "winston-daily-rotate-file": "^4.7.1"
   },
diff --git a/prisma/migrations/20230805073126_addition_table/migration.sql b/prisma/migrations/20230805073126_addition_table/migration.sql
new file mode 100644
index 0000000..df15ca6
--- /dev/null
+++ b/prisma/migrations/20230805073126_addition_table/migration.sql
@@ -0,0 +1,8 @@
+-- CreateTable
+CREATE TABLE "Addition" (
+    "id" TEXT NOT NULL,
+    "datetime" TIMESTAMP(3) NOT NULL,
+    "value" INTEGER NOT NULL,
+
+    CONSTRAINT "Addition_pkey" PRIMARY KEY ("id")
+);
diff --git a/prisma/migrations/migration_lock.toml b/prisma/migrations/migration_lock.toml
new file mode 100644
index 0000000..fbffa92
--- /dev/null
+++ b/prisma/migrations/migration_lock.toml
@@ -0,0 +1,3 @@
+# Please do not edit this file manually
+# It should be added in your version-control system (i.e. Git)
+provider = "postgresql"
\ No newline at end of file
diff --git a/prisma/schema.prisma b/prisma/schema.prisma
new file mode 100644
index 0000000..c759ca1
--- /dev/null
+++ b/prisma/schema.prisma
@@ -0,0 +1,17 @@
+// This is your Prisma schema file,
+// learn more about it in the docs: https://pris.ly/d/prisma-schema
+
+generator client {
+  provider = "prisma-client-js"
+}
+
+datasource db {
+  provider = "postgresql"
+  url      = env("DATABASE_URL")
+}
+
+model Addition {
+  id String @id
+  datetime DateTime
+  value Int
+}
\ No newline at end of file
diff --git a/src/database/database.test.ts b/src/database/database.test.ts
new file mode 100644
index 0000000..309ebf2
--- /dev/null
+++ b/src/database/database.test.ts
@@ -0,0 +1,13 @@
+import { createAddition, readAddition } from './database';
+
+describe('Database', () => {
+  it('creates a new record in the Addition table and reads it', async () => {
+    const value = 13;
+
+    const createResult = await createAddition(value);
+
+    const readResult = await readAddition(createResult.id);
+    expect(readResult).toBeDefined();
+    expect(readResult.value).toBe(value);
+  });
+});
diff --git a/src/database/database.ts b/src/database/database.ts
new file mode 100644
index 0000000..f583adb
--- /dev/null
+++ b/src/database/database.ts
@@ -0,0 +1,32 @@
+import { PrismaClient } from '@prisma/client';
+import { randomUUID } from 'crypto';
+
+const prisma = new PrismaClient();
+
+/**
+ * Create a new record in the Addition table.
+ * @param value - The value number to add as a new record.
+ * @returns Whether the database operation succeeded.
+ */
+export async function createAddition(value: number) {
+  return await prisma.addition.create({
+    data: {
+      id: randomUUID(),
+      datetime: new Date(),
+      value
+    }
+  });
+}
+
+/**
+ * Retrieve a record from the Addition table.
+ * @param id - The id of the record.
+ * @returns The retrieved record, or an error.
+ */
+export async function readAddition(id: string) {
+  return await prisma.addition.findUniqueOrThrow({
+    where: {
+      id
+    }
+  });
+}
diff --git a/src/index.ts b/src/index.ts
index 1835300..38758dd 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,5 +1,7 @@
 import server from './server/server';
 
-server.listen(3000, () => {
-  console.log('Server running on port 3000');
+const PORT = process.env.PORT || 3000;
+
+server.listen(PORT, () => {
+  console.log(`Server running on port ${PORT}`);
 });
diff --git a/src/server/server.test.ts b/src/server/server.test.ts
index 91778fa..d169f95 100644
--- a/src/server/server.test.ts
+++ b/src/server/server.test.ts
@@ -1,15 +1,9 @@
 import requests from 'supertest';
 import server from './server';
 
-beforeAll(() => {
-  jest.mock('../utils/addition', () => ({
-    addition: jest.fn((value: number) => value + 1)
-  }));
-});
-
-afterAll(() => {
-  jest.clearAllMocks();
-});
+jest.mock('../utils/addition', () => ({
+  addition: jest.fn((value: number) => value + 1)
+}));
 
 describe('server', () => {
   it('returns input value increased by one', async () => {
diff --git a/src/server/server.ts b/src/server/server.ts
index f82ed0f..0d7b1bb 100644
--- a/src/server/server.ts
+++ b/src/server/server.ts
@@ -22,14 +22,18 @@ const schema = {
   required: ['value']
 };
 
-server.post('/', (req: Request, res: Response) => {
+server.post('/', async (req: Request, res: Response) => {
   logger.info(`POST / with ${JSON.stringify(req.body)}`);
   if (!validator.validate(req.body, schema).valid) {
     return res.status(400).json({ message: 'Malformed query parameters' });
   }
 
+  const { value } = req.body;
+
+  const result = await addition(value);
+
   return res.json({
-    response: addition(parseInt(req.body.value))
+    response: result
   });
 });
 
diff --git a/src/utils/addition.test.ts b/src/utils/addition.test.ts
index 5655e5b..22216d3 100644
--- a/src/utils/addition.test.ts
+++ b/src/utils/addition.test.ts
@@ -1,8 +1,17 @@
+import { randomUUID } from 'crypto';
 import { addition } from './addition';
 
+jest.mock('../database/database', () => ({
+  createAddition: jest.fn((value: number) => ({
+    id: randomUUID(),
+    datetime: new Date(),
+    value
+  }))
+}));
+
 describe('call', () => {
   it('returns the input value increased by one', async () => {
-    const response = addition(3);
+    const response = await addition(3);
 
     expect(response).toBe(4);
   });
diff --git a/src/utils/addition.ts b/src/utils/addition.ts
index 23b0cba..926f9ed 100644
--- a/src/utils/addition.ts
+++ b/src/utils/addition.ts
@@ -1,11 +1,14 @@
+import { createAddition } from '../database/database';
 import { logger } from './logger';
 
 /**
- * Format a response message containing a user input.
+ * Increase the user imput value by one, and creates an Addition record with that value.
  * @param number - The user input value.
  * @returns The value increased by one.
  */
-export function addition(value: number) {
+export async function addition(value: number) {
   logger.info(`addition(${value})`);
+  await createAddition(value);
+
   return value + 1;
 }
diff --git a/src/utils/clearDatabase.ts b/src/utils/clearDatabase.ts
new file mode 100644
index 0000000..810eef4
--- /dev/null
+++ b/src/utils/clearDatabase.ts
@@ -0,0 +1,14 @@
+import { PrismaClient } from '@prisma/client';
+
+const prisma = new PrismaClient();
+
+/**
+ * Clear the database of all records.
+ */
+export const clearDatabase = async () => {
+  await prisma.addition.deleteMany({});
+};
+
+global.beforeAll(async () => {
+  await clearDatabase();
+});
diff --git a/yarn.lock b/yarn.lock
index 4a7fe9a..e0fbb3b 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -846,6 +846,23 @@
     "@nodelib/fs.scandir" "2.1.5"
     fastq "^1.6.0"
 
+"@prisma/client@5.1.1":
+  version "5.1.1"
+  resolved "https://registry.yarnpkg.com/@prisma/client/-/client-5.1.1.tgz#ea2b0c8599bdb3f86d92e8df46fba795a744db01"
+  integrity sha512-fxcCeK5pMQGcgCqCrWsi+I2rpIbk0rAhdrN+ke7f34tIrgPwA68ensrpin+9+fZvuV2OtzHmuipwduSY6HswdA==
+  dependencies:
+    "@prisma/engines-version" "5.1.1-1.6a3747c37ff169c90047725a05a6ef02e32ac97e"
+
+"@prisma/engines-version@5.1.1-1.6a3747c37ff169c90047725a05a6ef02e32ac97e":
+  version "5.1.1-1.6a3747c37ff169c90047725a05a6ef02e32ac97e"
+  resolved "https://registry.yarnpkg.com/@prisma/engines-version/-/engines-version-5.1.1-1.6a3747c37ff169c90047725a05a6ef02e32ac97e.tgz#2e8a1f098ec09452dbe00923b24f582f95d1747c"
+  integrity sha512-owZqbY/wucbr65bXJ/ljrHPgQU5xXTSkmcE/JcbqE1kusuAXV/TLN3/exmz21SZ5rJ7WDkyk70J2G/n68iogbQ==
+
+"@prisma/engines@5.1.1":
+  version "5.1.1"
+  resolved "https://registry.yarnpkg.com/@prisma/engines/-/engines-5.1.1.tgz#9c26d209f93a563e048eab63b1976f222f1707d0"
+  integrity sha512-NV/4nVNWFZSJCCIA3HIFJbbDKO/NARc9ej0tX5S9k2EVbkrFJC4Xt9b0u4rNZWL4V+F5LAjvta8vzEUw0rw+HA==
+
 "@sinclair/typebox@^0.27.8":
   version "0.27.8"
   resolved "https://registry.npmjs.org/@sinclair/typebox/-/typebox-0.27.8.tgz"
@@ -1922,6 +1939,11 @@ cross-spawn@^7.0.2, cross-spawn@^7.0.3:
     shebang-command "^2.0.0"
     which "^2.0.1"
 
+crypto@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/crypto/-/crypto-1.0.1.tgz#2af1b7cad8175d24c8a1b0778255794a21803037"
+  integrity sha512-VxBKmeNcqQdiUQUW2Tzq0t377b54N2bMtXO/qiLa+6eRRmmC4qT3D4OnTGoT/U6O9aklQ/jTwbOtRMTTY8G0Ig==
+
 dargs@^7.0.0:
   version "7.0.0"
   resolved "https://registry.npmjs.org/dargs/-/dargs-7.0.0.tgz"
@@ -3936,6 +3958,13 @@ pretty-format@^29.0.0, pretty-format@^29.6.1:
     ansi-styles "^5.0.0"
     react-is "^18.0.0"
 
+prisma@^5.1.1:
+  version "5.1.1"
+  resolved "https://registry.yarnpkg.com/prisma/-/prisma-5.1.1.tgz#8f5c0f9467a828746cb94f846d694dc7b7481a9e"
+  integrity sha512-WJFG/U7sMmcc6TjJTTifTfpI6Wjoh55xl4AzopVwAdyK68L9/ogNo8QQ2cxuUjJf/Wa82z/uhyh3wMzvRIBphg==
+  dependencies:
+    "@prisma/engines" "5.1.1"
+
 prompts@^2.0.1:
   version "2.4.2"
   resolved "https://registry.npmjs.org/prompts/-/prompts-2.4.2.tgz"