diff --git a/codeception.yml b/codeception.yml
index e303d34e1..2d4f57130 100644
--- a/codeception.yml
+++ b/codeception.yml
@@ -17,4 +17,4 @@ paths:
 
 settings:
     shuffle: false
-    lint: true
\ No newline at end of file
+    lint: true
diff --git a/composer.json b/composer.json
index ce7dfb195..530ce31bd 100644
--- a/composer.json
+++ b/composer.json
@@ -3,7 +3,7 @@
   "description": "Desafio para candidatos a back-end.",
   "type": "project",
   "require": {
-    "php": ">= 7.4"
+    "php": ">= 8.2"
   },
   "require-dev": {
     "squizlabs/php_codesniffer": "^3.4",
diff --git a/src/CurrencyConverter.php b/src/CurrencyConverter.php
new file mode 100644
index 000000000..90c74b864
--- /dev/null
+++ b/src/CurrencyConverter.php
@@ -0,0 +1,44 @@
+<?php
+
+namespace App;
+
+/**
+ * Class CurrencyConverter
+ *
+ * Classe responsável por converter valores entre diferentes moedas.
+ *
+ * @package App
+ */
+class CurrencyConverter
+{
+    const CURRENCY_BRL = 'BRL';
+    const CURRENCY_USD = 'USD';
+    const CURRENCY_EUR = 'EUR';
+
+    /**
+     * Converte o valor de uma moeda para outra com base na taxa de conversão.
+     *
+     * @param float  $amount       Valor a ser convertido.
+     * @param string $fromCurrency Moeda de origem.
+     * @param string $toCurrency   Moeda de destino.
+     * @param float  $rate         Taxa de conversão.
+     *
+     * @return float Valor convertido.
+     * @throws \InvalidArgumentException
+     */
+    public function convert(float $amount, string $fromCurrency, string $toCurrency, float $rate): float
+    {
+        if ($amount <= 0 || $rate <= 0) {
+            throw new \InvalidArgumentException("Invalid amount or rate.");
+        }
+
+        if (!in_array($fromCurrency, [self::CURRENCY_BRL, self::CURRENCY_USD, self::CURRENCY_EUR], true) ||
+            !in_array($toCurrency, [self::CURRENCY_BRL, self::CURRENCY_USD, self::CURRENCY_EUR], true)) {
+            throw new \InvalidArgumentException("Invalid currency.");
+        }
+
+        $convertedAmount = $amount * $rate;
+
+        return round($convertedAmount, 2);
+    }
+}
diff --git a/src/Router.php b/src/Router.php
new file mode 100644
index 000000000..04235f5d8
--- /dev/null
+++ b/src/Router.php
@@ -0,0 +1,54 @@
+<?php
+
+namespace App;
+
+/**
+ * Class Router
+ *
+ * Classe responsável por realizar o roteamento da URL da requisição.
+ *
+ * @package App
+ */
+class Router
+{
+    /**
+     * Realiza o roteamento da URL da requisição.
+     *
+     * @param string $url URL da requisição.
+     *
+     * @return array Dados da requisição roteada (amount, fromCurrency, toCurrency, rate).
+     * @throws \InvalidArgumentException Caso a ação seja inválida, o número de parâmetros seja inválido,
+     *                                    ou o valor ou taxa sejam inválidos.
+     */
+    public function route(string $url): array
+    {
+        $urlParts = explode('/', trim($url, '/'));
+        $action = array_shift($urlParts);
+
+        if ($action !== 'exchange') {
+            throw new \InvalidArgumentException("Invalid action.");
+        }
+
+        if (count($urlParts) !== 4) {
+            throw new \InvalidArgumentException("Invalid number of parameters.");
+        }
+
+        list($amount, $fromCurrency, $toCurrency, $rate) = $urlParts;
+
+        if (!is_numeric($amount) || !is_numeric($rate)) {
+            throw new \InvalidArgumentException("Invalid amount or rate.");
+        }
+
+        // Optionally validate currencies here if needed
+        // Example: if (!in_array($fromCurrency, ['BRL', 'USD', 'EUR']) || !in_array($toCurrency, ['BRL', 'USD', 'EUR'])) {
+        //     throw new \InvalidArgumentException("Invalid currency.");
+        // }
+
+        return [
+            'amount' => (float) $amount,
+            'fromCurrency' => strtoupper($fromCurrency),
+            'toCurrency' => strtoupper($toCurrency),
+            'rate' => (float) $rate,
+        ];
+    }
+}
diff --git a/src/index.php b/src/index.php
index 92841bc87..9f54c420f 100644
--- a/src/index.php
+++ b/src/index.php
@@ -2,17 +2,49 @@
 /**
  * Back-end Challenge.
  *
- * PHP version 7.4
- *
- * Este será o arquivo chamado na execução dos testes automátizados.
+ * PHP version 8.2
  *
  * @category Challenge
  * @package  Back-end
- * @author   Seu Nome <seu-email@seu-provedor.com>
+ * @author   Guilherme Pontes <jgmarinhopontes@hotmail.com>
  * @license  http://opensource.org/licenses/MIT MIT
  * @link     https://github.com/apiki/back-end-challenge
  */
 declare(strict_types=1);
 
+namespace App;
+
 require __DIR__ . '/../vendor/autoload.php';
 
+$router = new Router();
+$currencyConverter = new CurrencyConverter();
+
+try {
+    $requestData = $router->route($_SERVER['REQUEST_URI']);
+
+    // Validação adicional pode ser adicionada aqui, se necessário
+    if (!isset($requestData['amount'], $requestData['fromCurrency'], $requestData['toCurrency'], $requestData['rate'])) {
+        throw new \InvalidArgumentException("Missing required parameters.");
+    }
+
+    $convertedAmount = $currencyConverter->convert(
+        $requestData['amount'],
+        $requestData['fromCurrency'],
+        $requestData['toCurrency'],
+        $requestData['rate']
+    );
+    
+    $response = [
+        'valorConvertido' => $convertedAmount,
+        'simboloMoeda' => 
+            $requestData['toCurrency'] === CurrencyConverter::CURRENCY_USD
+            ? '$'
+            : 'R$',
+    ];
+
+    header('Content-Type: application/json');
+    echo json_encode($response);
+} catch (\InvalidArgumentException $e) {
+    header("HTTP/1.1 400 Bad Request");
+    echo json_encode(['error' => $e->getMessage()]);
+}
diff --git a/tests/ApiCest.php b/tests/ApiCest.php
index e92352118..ba3783c36 100644
--- a/tests/ApiCest.php
+++ b/tests/ApiCest.php
@@ -1,6 +1,8 @@
 <?php
+
 class ApiCest
 {
+    // Testa a API sem fornecer o valor
     public function tryApiWithoutValue(ApiTester $I)
     {
         $I->sendGET('/');
@@ -8,6 +10,7 @@ public function tryApiWithoutValue(ApiTester $I)
         $I->seeResponseIsJson();
     }
 
+    // Testa a API sem fornecer a moeda de origem
     public function tryApiWithoutFrom(ApiTester $I)
     {
         $I->sendGET('/10');
@@ -15,6 +18,7 @@ public function tryApiWithoutFrom(ApiTester $I)
         $I->seeResponseIsJson();
     }
 
+    // Testa a API sem fornecer a moeda de destino
     public function tryApiWithoutTo(ApiTester $I)
     {
         $I->sendGET('/10/EUR');
@@ -22,6 +26,7 @@ public function tryApiWithoutTo(ApiTester $I)
         $I->seeResponseIsJson();
     }
 
+    // Testa a API sem fornecer a taxa de conversão
     public function tryApiWithoutRate(ApiTester $I)
     {
         $I->sendGET('/10/EUR/USD');
@@ -29,6 +34,7 @@ public function tryApiWithoutRate(ApiTester $I)
         $I->seeResponseIsJson();
     }
 
+    // Testa a API com valor inválido
     public function tryApiInvalidValue(ApiTester $I)
     {
         $I->sendGET('/a/EUR/USD/0.5');
@@ -36,6 +42,7 @@ public function tryApiInvalidValue(ApiTester $I)
         $I->seeResponseIsJson();
     }
 
+    // Testa a API com valor negativo
     public function tryApiNegativeValue(ApiTester $I)
     {
         $I->sendGET('/-10/EUR/USD/0.5');
@@ -43,6 +50,7 @@ public function tryApiNegativeValue(ApiTester $I)
         $I->seeResponseIsJson();
     }
 
+    // Testa a API com moeda de origem inválida
     public function tryApiInvalidFrom(ApiTester $I)
     {
         $I->sendGET('/10/eur/USD/0.5');
@@ -50,6 +58,7 @@ public function tryApiInvalidFrom(ApiTester $I)
         $I->seeResponseIsJson();
     }
 
+    // Testa a API com moeda de destino inválida
     public function tryApiInvalidTo(ApiTester $I)
     {
         $I->sendGET('/10/EUR/usd/0.5');
@@ -57,6 +66,7 @@ public function tryApiInvalidTo(ApiTester $I)
         $I->seeResponseIsJson();
     }
 
+    // Testa a API com taxa de conversão inválida
     public function tryApiInvalidRate(ApiTester $I)
     {
         $I->sendGET('/10/EUR/USD/a');
@@ -64,6 +74,7 @@ public function tryApiInvalidRate(ApiTester $I)
         $I->seeResponseIsJson();
     }
 
+    // Testa a API com taxa de conversão negativa
     public function tryApiNegativeRate(ApiTester $I)
     {
         $I->sendGET('/10/EUR/USD/-0.5');
@@ -71,6 +82,7 @@ public function tryApiNegativeRate(ApiTester $I)
         $I->seeResponseIsJson();
     }
 
+    // Testa a conversão de BRL para USD
     public function tryApiBrlToUsd(ApiTester $I)
     {
         $I->sendGET('/7.8/BRL/USD/0.5');
@@ -82,6 +94,7 @@ public function tryApiBrlToUsd(ApiTester $I)
         ]);
     }
 
+    // Testa a conversão de USD para BRL
     public function tryApiUsdToBrl(ApiTester $I)
     {
         $I->sendGET('/7/USD/BRL/0.5');
@@ -93,6 +106,7 @@ public function tryApiUsdToBrl(ApiTester $I)
         ]);
     }
 
+    // Testa a conversão de BRL para EUR
     public function tryApiBrlToEur(ApiTester $I)
     {
         $I->sendGET('/7/BRL/EUR/5');
@@ -104,6 +118,7 @@ public function tryApiBrlToEur(ApiTester $I)
         ]);
     }
 
+    // Testa a conversão de EUR para BRL
     public function tryApiEurToBrl(ApiTester $I)
     {
         $I->sendGET('/7/EUR/BRL/5');
@@ -114,4 +129,4 @@ public function tryApiEurToBrl(ApiTester $I)
             'simboloMoeda' => 'R$',
         ]);
     }
-}
\ No newline at end of file
+}