diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 0000000..4d11e3f
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,21 @@
+name: Jest Tests
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Use Node.js
+        uses: actions/setup-node@v2
+        with:
+          node-version: '18.x'
+      - name: Install Dependencies
+        run: npm install
+      - name: Run Jest tests
+        run: npm run test
\ No newline at end of file
diff --git a/jest.config.js b/jest.config.js
new file mode 100644
index 0000000..fa04662
--- /dev/null
+++ b/jest.config.js
@@ -0,0 +1,6 @@
+/** @type {import('ts-jest').JestConfigWithTsJest} */
+module.exports = {
+  preset: 'ts-jest',
+  testEnvironment: 'node',
+  setupFilesAfterEnv: ['./tests/jest.setup.ts']
+};
\ No newline at end of file
diff --git a/package.json b/package.json
index aab2c03..a9efca3 100644
--- a/package.json
+++ b/package.json
@@ -4,6 +4,8 @@
   "description": "Official Top.gg Node SDK",
   "main": "./dist/index.js",
   "scripts": {
+    "test": "jest --verbose",
+    "test:coverage": "jest --coverage",
     "build": "tsc",
     "build:ci": "npm i --include=dev && tsc",
     "docs": "typedoc",
@@ -25,6 +27,7 @@
   "devDependencies": {
     "@top-gg/eslint-config": "^0.0.3",
     "@types/express": "^4.17.17",
+    "@types/jest": "^29.5.1",
     "@types/node": "^18.15.5",
     "@typescript-eslint/eslint-plugin": "^5.56.0",
     "@typescript-eslint/parser": "^5.56.0",
@@ -33,8 +36,10 @@
     "eslint-plugin-jest": "^27.2.1",
     "express": "^4.18.2",
     "husky": "^8.0.3",
+    "jest": "^29.5.0",
     "lint-staged": "^13.2.0",
     "prettier": "^2.8.6",
+    "ts-jest": "^29.1.0",
     "typedoc": "^0.23.28",
     "typescript": "^5.0.2"
   },
diff --git a/tests/Api.test.ts b/tests/Api.test.ts
new file mode 100644
index 0000000..04000db
--- /dev/null
+++ b/tests/Api.test.ts
@@ -0,0 +1,143 @@
+import { Api } from '../src/index';
+import ApiError from '../src/utils/ApiError';
+import { BOT, BOT_STATS, USER, VOTES } from './mocks/data';
+
+const is_owner = new Api('owner_token');
+const not_owner = new Api('not_owner_token');
+const no_token = new Api('');
+
+describe('API postStats test', () => {
+    it('postStats should return 401 when no token is provided', async() => {
+        await expect(no_token.postStats({serverCount: 1, shardCount: 0})).rejects.toThrowError(ApiError);
+    })
+    it('postStats without server count should throw error', async () => {
+        await expect(is_owner.postStats({shardCount: 0})).rejects.toThrowError(Error);
+    })
+    it('postStats should return 401 when no token is provided', async () => {
+        await expect(no_token.postStats({serverCount: 1, shardCount: 0})).rejects.toThrowError(ApiError);
+    })
+
+    /* 
+    TODO: Check for this is not added in code and api returns 400
+    it('postStats with invalid negative server count should throw error',  () => {
+        expect(is_owner.postStats({serverCount: -1, shardCount: 0})).rejects.toThrowError(Error);
+    })
+
+    TODO: Check for negative shardId is not added
+    it('postStats with invalid negative shardId should throw error', () => {
+        expect(is_owner.postStats({serverCount: 1, shardCount: 0, shardId: -1})).rejects.toThrowError(Error);
+    })
+
+    TODO: ShardId cannot be greater or equal to shardCount
+    it('postStats with shardId greater than shardCount should throw error', () => {
+        expect(is_owner.postStats({serverCount: 1, shardCount: 0, shardId: 1})).rejects.toThrowError(Error);
+    })
+
+    TODO: Check for negative shardCount is not added
+    it('postStats with invalid negative shardCount should throw error', () => {
+        expect(is_owner.postStats({serverCount: 1, shardCount: -1})).rejects.toThrowError(Error);
+    })
+
+    TODO: Check if shardCount is greater than 10000
+    it('postStats with invalid shardCount should throw error', () => {
+        expect(is_owner.postStats({serverCount: 1, shardCount: 10001})).rejects.toThrowError(Error);
+    })
+    */
+    
+   it('postStats should return 403 when token is not owner of bot', async () => {
+       await expect(not_owner.postStats({serverCount: 1, shardCount: 0})).rejects.toThrowError(ApiError);
+    })
+
+    it('postStats should return 200 when token is owner of bot', async () => {
+        await expect(is_owner.postStats({serverCount: 1, shardCount: 1})).resolves.toBeInstanceOf(Object);
+    })
+})
+
+describe('API getStats test', () => {
+    it('getStats should return 401 when no token is provided', () => {
+        expect(no_token.getStats('1')).rejects.toThrowError(ApiError);
+    })
+
+    it('getStats should return 404 when bot is not found', async() => {
+        await expect(is_owner.getStats('0')).rejects.toThrowError(ApiError);    
+    })
+
+    it('getStats should return 200 when bot is found', async () => {
+        expect(is_owner.getStats('1')).resolves.toStrictEqual({ 
+            serverCount: BOT_STATS.server_count,
+             shardCount: BOT_STATS.shard_count, 
+             shards: BOT_STATS.shards
+            });
+    })
+
+    it('getStats should throw when no id is provided', () => {
+        expect(is_owner.getStats('')).rejects.toThrowError(Error);
+    })
+})
+
+
+describe('API getBot test', () => {
+    it('getBot should return 401 when no token is provided', () => {
+        expect(no_token.getBot('1')).rejects.toThrowError(ApiError);
+    })
+    it('getBot should return 404 when bot is not found', () => {
+        expect(is_owner.getBot('0')).rejects.toThrowError(ApiError);
+    })
+    
+    it('getBot should return 200 when bot is found', async () => {
+        expect(is_owner.getBot('1')).resolves.toStrictEqual(BOT);
+    })
+    
+    it('getBot should throw when no id is provided', () => {
+        expect(is_owner.getBot('')).rejects.toThrowError(Error);
+    })
+    
+})
+describe('API getUser test', () => {
+    it('getUser should return 401 when no token is provided', () => {
+        expect(no_token.getUser('1')).rejects.toThrowError(ApiError);
+    })
+
+    it('getUser should return 404 when user is not found', () => {
+        expect(is_owner.getUser('0')).rejects.toThrowError(ApiError);
+    })
+    
+    it('getUser should return 200 when user is found', async () => {
+        expect(is_owner.getUser('1')).resolves.toStrictEqual(USER);
+    })
+    
+    it('getUser should throw when no id is provided', () => {
+        expect(is_owner.getUser('')).rejects.toThrowError(Error);
+    })
+})
+
+
+describe('API getVotes test', () => {
+    it('getVotes should return throw error when no token is provided', () => {
+        expect(no_token.getVotes()).rejects.toThrowError(Error);
+    })
+    
+    it('getVotes should return 200 when token is provided', () => {
+        expect(is_owner.getVotes()).resolves.toEqual(VOTES);
+    })
+});
+
+describe('API hasVoted test', () => {
+    it('hasVoted should throw error when no token is provided', () => {
+        expect(no_token.hasVoted('1')).rejects.toThrowError(Error);
+    })
+
+    it('hasVoted should return 200 when token is provided', () => {
+        expect(is_owner.hasVoted('1')).resolves.toBe(true);
+    })
+
+    it('hasVoted should throw error when no id is provided', () => {
+        expect(is_owner.hasVoted('')).rejects.toThrowError(Error);
+    })
+})
+
+describe('API isWeekend tests', () => {
+    it('isWeekend should return true', async () => {
+        expect(is_owner.isWeekend()).resolves.toBe(true)
+    })
+});
\ No newline at end of file
diff --git a/tests/jest.setup.ts b/tests/jest.setup.ts
new file mode 100644
index 0000000..7145c22
--- /dev/null
+++ b/tests/jest.setup.ts
@@ -0,0 +1,76 @@
+import { MockAgent, setGlobalDispatcher } from 'undici';
+import { MockInterceptor } from 'undici/types/mock-interceptor';
+import { endpoints } from './mocks/endpoints';
+
+interface IOptions {
+    pattern: string;
+    requireAuth?: boolean;
+    validate?: (request: MockInterceptor.MockResponseCallbackOptions) => void;
+}
+
+export const getIdInPath = (pattern: string, url: string) => {
+    const regex = new RegExp(`^${pattern.replace(/:[^/]+/g, '([^/]+)')}$`);
+    const match = url.match(regex);
+    
+    return match ? match[1] : null;
+}
+
+export const isMatchingPath = (pattern: string, url: string) => {
+    // Remove query params
+    url = url.split("?")[0]
+
+    if (pattern === url) {
+        return true;
+    }
+
+    // Check if there is an exact match
+    if(endpoints.some(({ pattern }) => pattern === url)) {
+        return false
+    };
+
+    return getIdInPath(pattern, url) !== null;
+}
+
+beforeEach(() => {
+    const mockAgent = new MockAgent()
+    mockAgent.disableNetConnect();
+    const client = mockAgent.get('https://top.gg');
+    
+    
+    const generateResponse = (request: MockInterceptor.MockResponseCallbackOptions, statusCode: number, data: any, headers = {}, options: IOptions) => {
+        const requestHeaders = request.headers as any;
+    
+        // Check if token is avaliable
+        if (options.requireAuth && (!requestHeaders['authorization'] || requestHeaders['authorization'] == '')) return { statusCode: 401 };
+    
+        // Check that user is owner of bot
+        if (options.requireAuth && requestHeaders['authorization'] !== 'owner_token') return { statusCode: 403 }
+        
+        const error = options.validate?.(request);
+        if (error) return error;
+    
+        return {
+            statusCode,
+            data: JSON.stringify(data),
+            responseOptions: {
+                headers: { 'content-type': 'application/json', ...headers },
+            }
+        }
+    }
+    
+    endpoints.forEach(({ pattern, method, data, requireAuth, validate }) => {
+        client.intercept({
+            path: (path) => isMatchingPath(pattern, path),
+            method,
+        }).reply((request) => {return generateResponse(request, 200, data, {}, { pattern, requireAuth, validate: validate })});
+    })
+    
+    client.intercept({
+        path: (path) => !endpoints.some(({ pattern }) => isMatchingPath(pattern, path)),
+        method: (_) => true,
+    }).reply((request) => {
+        throw Error(`No endpoint found for ${request.method} ${request.path}`)
+    })
+    
+    setGlobalDispatcher(mockAgent);
+})
\ No newline at end of file
diff --git a/tests/mocks/data.ts b/tests/mocks/data.ts
new file mode 100644
index 0000000..fc3bd6b
--- /dev/null
+++ b/tests/mocks/data.ts
@@ -0,0 +1,82 @@
+// https://docs.top.gg/api/bot/#find-one-bot
+export const BOT = {
+  "defAvatar": "6debd47ed13483642cf09e832ed0bc1b",
+  "invite": "",
+  "website": "https://discordbots.org",
+  "support": "KYZsaFb",
+  "github": "https://github.com/DiscordBotList/Luca",
+  "longdesc": "Luca only works in the **Discord Bot List** server.    \r\nPrepend commands with the prefix `-` or `@Luca#1375`.    \r\n**Please refrain from using these commands in non testing channels.**\r\n- `botinfo @bot` Shows bot info, title redirects to site listing.\r\n- `bots @user`* Shows all bots of that user, includes bots in the queue.\r\n- `owner / -owners @bot`* Shows all owners of that bot.\r\n- `prefix @bot`* Shows the prefix of that bot.\r\n* Mobile friendly version exists. Just add `noembed` to the end of the command.\r\n",
+  "shortdesc": "Luca is a bot for managing and informing members of the server",
+  "prefix": "- or @Luca#1375",
+  "lib": "discord.js",
+  "clientid": "264811613708746752",
+  "avatar": "7edcc4c6fbb0b23762455ca139f0e1c9",
+  "id": "264811613708746752",
+  "discriminator": "1375",
+  "username": "Luca",
+  "date": "2017-04-26T18:08:17.125Z",
+  "server_count": 2,
+  "guilds": ["417723229721853963", "264445053596991498"],
+  "shards": [],
+  "monthlyPoints": 19,
+  "points": 397,
+  "certifiedBot": false,
+  "owners": ["129908908096487424"],
+  "tags": ["Moderation", "Role Management", "Logging"],
+  "donatebotguildid": ""
+}
+
+// https://docs.top.gg/api/bot/#search-bots
+export const BOTS = {
+  limit: 0,
+  offset: 0,
+  count: 1,
+  total: 1,
+  results: [BOT],
+}
+
+// https://docs.top.gg/api/bot/#last-1000-votes
+export const VOTES = [
+  {
+    "username": "Xetera",
+    "id": "140862798832861184",
+    "avatar": "a_1241439d430def25c100dd28add2d42f"
+  }
+]
+
+// https://docs.top.gg/api/bot/#bot-stats
+export const BOT_STATS = {
+  server_count: 0,
+  shards: ['200'],
+  shard_count: 1
+}
+
+// https://docs.top.gg/api/bot/#individual-user-vote
+export const USER_VOTE = {
+  "voted": 1
+}
+
+// https://docs.top.gg/api/user/#structure
+export const USER = {
+  "discriminator": "0001",
+  "avatar": "a_1241439d430def25c100dd28add2d42f",
+  "id": "140862798832861184",
+  "username": "Xetera",
+  "defAvatar": "322c936a8c8be1b803cd94861bdfa868",
+  "admin": true,
+  "webMod": true,
+  "mod": true,
+  "certifiedDev": false,
+  "supporter": false,
+  "social": {}
+}
+
+export const USER_VOTE_CHECK = { 
+  voted: 1 
+}
+
+// Undocumented 😢
+export const WEEKEND = {
+  is_weekend: true
+}
+
diff --git a/tests/mocks/endpoints.ts b/tests/mocks/endpoints.ts
new file mode 100644
index 0000000..1919c0a
--- /dev/null
+++ b/tests/mocks/endpoints.ts
@@ -0,0 +1,86 @@
+import { MockInterceptor } from 'undici/types/mock-interceptor';
+import { BOT, BOTS, BOT_STATS, USER, USER_VOTE, USER_VOTE_CHECK, VOTES, WEEKEND } from './data';
+import { getIdInPath } from '../jest.setup';
+
+export const endpoints = [
+    {
+        pattern: '/api/bots',
+        method: 'GET',
+        data: BOTS,
+        requireAuth: true
+    },
+    {
+        pattern: '/api/bots/:bot_id',
+        method: 'GET',
+        data: BOT,
+        requireAuth: true,
+        validate: (request: MockInterceptor.MockResponseCallbackOptions) => {
+            const bot_id = getIdInPath('/api/bots/:bot_id', request.path);
+            if (Number(bot_id) === 0) return { statusCode: 404 };
+            return null
+        },
+    },
+    {
+        pattern: '/api/bots/:bot_id/votes',
+        method: 'GET',
+        data: VOTES,
+        requireAuth: true
+    },
+    {
+        pattern: '/api/bots/votes',
+        method: 'GET',
+        data: VOTES,
+        requireAuth: true
+    }, // Undocumented
+    {
+        pattern: '/api/bots/:bot_id/stats',
+        method: 'GET',
+        data: BOT_STATS,
+        requireAuth: true,
+        validate: (request: MockInterceptor.MockResponseCallbackOptions) => {
+            const bot_id = getIdInPath('/api/bots/:bot_id/stats', request.path);
+            if (Number(bot_id) === 0) return { statusCode: 404 };
+            return null
+        },
+    },
+    {
+        pattern: '/api/bots/:bot_id/check',
+        method: 'GET',
+        data: USER_VOTE,
+        requireAuth: true
+    },
+    {
+        pattern: '/api/bots/:bot_id/stats',
+        method: 'POST',
+        requireAuth: true
+    },
+    {
+        pattern: '/api/bots/stats',
+        method: 'POST',
+        data: {},
+        requireAuth: true
+    }, // Undocumented
+    {
+        pattern: '/api/users/:user_id',
+        method: 'GET',
+        data: USER,
+        requireAuth: true,
+        validate: (request: MockInterceptor.MockResponseCallbackOptions) => {
+            const bot_id = getIdInPath('/api/users/:user_id', request.path);
+            if (Number(bot_id) === 0) return { statusCode: 404 };
+            return null
+        },
+    },
+    {
+        pattern: '/api/bots/check',
+        method: 'GET',
+        data: USER_VOTE_CHECK,
+        requireAuth: true
+    },
+    { 
+        pattern: '/api/weekend', 
+        method: 'GET', 
+        data: WEEKEND, 
+        requireAuth: true 
+    },
+];
\ No newline at end of file