diff --git a/modulo4/servicos-backend/.gitignore b/modulo4/servicos-backend/.gitignore
new file mode 100644
index 0000000..0a19ff0
--- /dev/null
+++ b/modulo4/servicos-backend/.gitignore
@@ -0,0 +1,4 @@
+node_modules
+build
+.env
+package-lock.json
\ No newline at end of file
diff --git a/modulo4/servicos-backend/package.json b/modulo4/servicos-backend/package.json
new file mode 100644
index 0000000..e404bed
--- /dev/null
+++ b/modulo4/servicos-backend/package.json
@@ -0,0 +1,33 @@
+{
+  "name": "servicos-backend",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "dev": "ts-node-dev ./src/index.ts",
+    "start": "node ./build/index.js",
+    "postinstall": "tsc",
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "engines": {
+    "node": "v16.13.2"
+  },
+  "keywords": [],
+  "author": "Pablo Leão",
+  "license": "ISC",
+  "devDependencies": {
+    "@types/cors": "^2.8.12",
+    "@types/express": "^4.17.13",
+    "ts-node-dev": "^2.0.0",
+    "typescript": "^4.8.2"
+  },
+  "dependencies": {
+    "@types/knex": "^0.16.1",
+    "axios": "^0.27.2",
+    "cors": "^2.8.5",
+    "dotenv": "^16.0.2",
+    "express": "^4.18.1",
+    "knex": "^2.2.0",
+    "mysql": "^2.18.1"
+  }
+}
diff --git a/modulo4/servicos-backend/requests.rest b/modulo4/servicos-backend/requests.rest
new file mode 100644
index 0000000..f1a9b72
--- /dev/null
+++ b/modulo4/servicos-backend/requests.rest
@@ -0,0 +1,8 @@
+POST https://servicos-backend-pablo.herokuapp.com/user
+Content-Type: application/json
+
+{
+    "cep": "21030001", 
+    "numero": "9020", 
+    "complemento": "CIAGA"
+}
\ No newline at end of file
diff --git a/modulo4/servicos-backend/src/app.ts b/modulo4/servicos-backend/src/app.ts
new file mode 100644
index 0000000..9dc3edf
--- /dev/null
+++ b/modulo4/servicos-backend/src/app.ts
@@ -0,0 +1,9 @@
+import express, { Express } from 'express';
+import cors from 'cors';
+
+const app: Express = express();
+
+app.use(express.json());
+app.use(cors());
+
+export default app;
\ No newline at end of file
diff --git a/modulo4/servicos-backend/src/data/connection.ts b/modulo4/servicos-backend/src/data/connection.ts
new file mode 100644
index 0000000..eec9370
--- /dev/null
+++ b/modulo4/servicos-backend/src/data/connection.ts
@@ -0,0 +1,16 @@
+import dotenv from "dotenv";
+import knex from "knex";
+
+dotenv.config();
+
+export const connection = knex({
+	client: "mysql",
+	connection: {
+        host: process.env.DB_HOST,
+        port: 3306,
+        user: process.env.DB_USER,
+        password: process.env.DB_PASSWORD,
+        database: process.env.DB_SCHEMA,
+        multipleStatements: true
+  }
+});
\ No newline at end of file
diff --git a/modulo4/servicos-backend/src/data/insertAddressDB.ts b/modulo4/servicos-backend/src/data/insertAddressDB.ts
new file mode 100644
index 0000000..b0842f7
--- /dev/null
+++ b/modulo4/servicos-backend/src/data/insertAddressDB.ts
@@ -0,0 +1,18 @@
+import { Address } from "../types/types";
+import { connection } from "./connection";
+
+export const insertAddressDB = async (cep: string, numero: string, complemento: string | undefined, address: Address): Promise<void> => {
+    const { logradouro, bairro, cidade, estado } = address;
+    const id_user: string = Date.now().toString();
+
+    await connection("exercicios_servicos_address").insert({
+        id_user,
+        cep,
+        logradouro,
+        numero,
+        complemento,
+        bairro,
+        cidade,
+        estado
+    });
+}
\ No newline at end of file
diff --git a/modulo4/servicos-backend/src/endpoints/insertAddress.ts b/modulo4/servicos-backend/src/endpoints/insertAddress.ts
new file mode 100644
index 0000000..fb5e819
--- /dev/null
+++ b/modulo4/servicos-backend/src/endpoints/insertAddress.ts
@@ -0,0 +1,36 @@
+import { Request, Response } from "express";
+import { insertAddressDB } from "../data/insertAddressDB";
+import { getAddressInfo } from "../services/getAdressInfo";
+
+export const insertAddress = async (req: Request, res: Response) => {
+    try {
+        const { cep, numero, complemento } = req.body;
+        
+        if(!cep || !numero) {
+            throw new Error("Verifique os campos cep e numero. Os dados devem estar preenchidos.");            
+        } 
+
+        const address = await getAddressInfo(cep);
+
+        if (!address || address === undefined) {
+            throw new Error("CEP inválido.");
+        }
+
+        await insertAddressDB(cep, numero, complemento, address);
+
+        res.status(200).send("Endereço criado com sucesso!");
+
+    } catch (error: any) {
+        switch(error.message) {
+            case "Verifique os campos cep e numero. Os dados devem estar preenchidos.":
+                res.status(422).send({ message: error.message });
+                break;
+            case "CEP inválido.":
+                res.status(404).send({ message: error.message });
+                break;
+            default:
+                res.status(500).send(error.sqlMessage || { message: "Erro inesperado!" });
+                break;
+        }
+    }
+}
\ No newline at end of file
diff --git a/modulo4/servicos-backend/src/index.ts b/modulo4/servicos-backend/src/index.ts
new file mode 100644
index 0000000..432af92
--- /dev/null
+++ b/modulo4/servicos-backend/src/index.ts
@@ -0,0 +1,14 @@
+import { AddressInfo } from 'net';
+import app from './app';
+import { insertAddress } from './endpoints/insertAddress';
+
+app.post("/user", insertAddress);
+
+const server = app.listen(process.env.PORT || 3003, () => {
+    if (server) {
+       const address = server.address() as AddressInfo;
+       console.log(`Server is running in http://localhost:${address.port}`);
+    } else {
+       console.error(`Failure upon starting server.`);
+    }
+});
\ No newline at end of file
diff --git a/modulo4/servicos-backend/src/services/getAdressInfo.ts b/modulo4/servicos-backend/src/services/getAdressInfo.ts
new file mode 100644
index 0000000..783e549
--- /dev/null
+++ b/modulo4/servicos-backend/src/services/getAdressInfo.ts
@@ -0,0 +1,21 @@
+import axios from 'axios';
+import { Address } from '../types/types';
+
+export const getAddressInfo = async (cep: string): Promise<Address | undefined> => {
+    try {
+
+        const result = await axios.get(`https://viacep.com.br/ws/${cep}/json/`);
+        const address: Address = {
+            logradouro: result.data.logradouro,
+            bairro: result.data.bairro,
+            cidade: result.data.localidade,
+            estado: result.data.uf
+        }
+        return address;
+
+    } catch (error: any) {
+
+        return undefined;
+
+    }
+}
\ No newline at end of file
diff --git a/modulo4/servicos-backend/src/types/types.ts b/modulo4/servicos-backend/src/types/types.ts
new file mode 100644
index 0000000..0b5a53a
--- /dev/null
+++ b/modulo4/servicos-backend/src/types/types.ts
@@ -0,0 +1,6 @@
+export type Address = {
+    logradouro: string,
+    bairro: string,
+    cidade: string,
+    estado: string
+}
\ No newline at end of file
diff --git a/modulo4/servicos-backend/tsconfig.json b/modulo4/servicos-backend/tsconfig.json
new file mode 100644
index 0000000..5f06550
--- /dev/null
+++ b/modulo4/servicos-backend/tsconfig.json
@@ -0,0 +1,14 @@
+{
+    "compilerOptions": {
+       "target": "es6",
+       "module": "commonjs",
+       "sourceMap": true,
+       "outDir": "./build",
+       "rootDir": "./src",
+       "removeComments": true,
+       "strict": true,
+       "noImplicitAny": true,
+       "esModuleInterop": true,
+       "forceConsistentCasingInFileNames": true
+    }
+}
\ No newline at end of file