diff --git a/classes/UspsV3Client.php b/classes/UspsV3Client.php
index ca13a78..7b4ba53 100644
--- a/classes/UspsV3Client.php
+++ b/classes/UspsV3Client.php
@@ -1,5 +1,10 @@
 <?php
 
+use Symfony\Component\HttpClient\HttpClient;
+use Symfony\Contracts\HttpClient\Exception\TransportExceptionInterface;
+use Symfony\Contracts\HttpClient\Exception\ClientExceptionInterface;
+use Symfony\Contracts\HttpClient\Exception\ServerExceptionInterface;
+
 class UspsV3Client
 {
     private $token;
@@ -10,15 +15,14 @@ class UspsV3Client
     {
         $this->token = $token;
         $this->isLive = $isLive;
-        // URLs from the OpenAPI spec
-        $this->baseUrl = $this->isLive
-            ? 'https://apis.usps.com/prices/v3'
+        // Base URLs per OpenAPI Spec
+        $this->baseUrl = $this->isLive 
+            ? 'https://apis.usps.com/prices/v3' 
             : 'https://apis-tem.usps.com/prices/v3';
     }
 
     /**
-     * Call Domestic Prices v3 API
-     * Endpoint: /base-rates/search
+     * Get Domestic Rate (Rates v3)
      */
     public function getDomesticRate($payload)
     {
@@ -26,56 +30,65 @@ class UspsV3Client
     }
 
     /**
-     * Call International Prices v3 API
-     * Endpoint: /base-rates/search (Under International Base path)
-     * Note: The spec shows a different base URL for International
+     * Get International Rate (Rates v3)
      */
     public function getInternationalRate($payload)
     {
-        // International uses a different base URL structure in the spec
-        $intlBaseUrl = $this->isLive
-            ? 'https://apis.usps.com/international-prices/v3'
+        // International endpoint uses a different base structure per spec
+        $intlBaseUrl = $this->isLive 
+            ? 'https://apis.usps.com/international-prices/v3' 
             : 'https://apis-tem.usps.com/international-prices/v3';
 
         return $this->post('/base-rates/search', $payload, $intlBaseUrl);
     }
 
+    /**
+     * Internal POST logic using Symfony HTTP Client
+     */
     private function post($endpoint, $payload, $overrideUrl = null)
     {
         $url = ($overrideUrl ? $overrideUrl : $this->baseUrl) . $endpoint;
 
-        $ch = curl_init();
-        curl_setopt($ch, CURLOPT_URL, $url);
-        curl_setopt($ch, CURLOPT_POST, 1);
-        curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($payload));
-        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
-        curl_setopt($ch, CURLOPT_HTTPHEADER, [
-            'Authorization: Bearer ' . $this->token,
-            'Content-Type: application/json',
-            'Accept: application/json'
+        $client = HttpClient::create([
+            'timeout' => 15,
+            'verify_peer' => false,
+            'verify_host' => false,
         ]);
 
-        $response = curl_exec($ch);
-        $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
+        try {
+            $response = $client->request('POST', $url, [
+                'headers' => [
+                    'Authorization' => 'Bearer ' . $this->token,
+                    'Content-Type' => 'application/json',
+                    'Accept' => 'application/json'
+                ],
+                'json' => $payload
+            ]);
 
-        if (curl_errno($ch)) {
-            $error = curl_error($ch);
+            // toArray(false) prevents exception on 4xx/5xx responses so we can parse the error body
+            $data = $response->toArray(false);
+            $statusCode = $response->getStatusCode();
 
-            return ['error' => 'CURL Error: ' . $error];
-        }
+            // Handle API Errors (400 Bad Request, 401 Unauthorized, etc)
+            if ($statusCode >= 400) {
+                $msg = isset($data['error']['message']) ? $data['error']['message'] : 'Unknown Error';
+                
+                // Try to extract deeper error detail (e.g., from 'errors' array)
+                if (isset($data['error']['errors'][0]['detail'])) {
+                    $msg .= ' - ' . $data['error']['errors'][0]['detail'];
+                } elseif (isset($data['error']['code'])) {
+                    $msg .= ' (' . $data['error']['code'] . ')';
+                }
 
-
-        $data = json_decode($response, true);
-
-        // Check for HTTP errors (400, 401, 403, etc)
-        if ($httpCode >= 400) {
-            $msg = isset($data['error']['message']) ? $data['error']['message'] : 'Unknown Error';
-            if (isset($data['error']['errors'][0]['detail'])) {
-                $msg .= ' - ' . $data['error']['errors'][0]['detail'];
+                return ['error' => "API HTTP $statusCode: $msg"];
             }
-            return ['error' => "HTTP $httpCode: $msg"];
-        }
 
-        return $data;
+            return $data;
+
+        } catch (TransportExceptionInterface $e) {
+            return ['error' => 'Network/Transport Error: ' . $e->getMessage()];
+        } catch (\Exception $e) {
+            return ['error' => 'Client Error: ' . $e->getMessage()];
+        }
     }
-}
+}
\ No newline at end of file
diff --git a/config_uk.xml b/config_uk.xml
new file mode 100644
index 0000000..f6acdf7
--- /dev/null
+++ b/config_uk.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<module>
+    <name>usps_api_bridge</name>
+    <displayName><![CDATA[USPS API Bridge (OAuth2)]]></displayName>
+    <version><![CDATA[1.0.0]]></version>
+    <description><![CDATA[Modern OAuth2 Bridge for the legacy ZH USPS Labels module.]]></description>
+    <author><![CDATA[Panariga]]></author>
+    <tab><![CDATA[shipping_logistics]]></tab>
+	<confirmUninstall><![CDATA[Are you sure? This will disable the connection to the new USPS API.]]></confirmUninstall>
+    <is_configurable>1</is_configurable>
+    <need_instance>0</need_instance>
+</module>
\ No newline at end of file
diff --git a/usps_api_bridge.php b/usps_api_bridge.php
index 750fcfa..31d05f0 100644
--- a/usps_api_bridge.php
+++ b/usps_api_bridge.php
@@ -2,6 +2,8 @@
 if (!defined('_PS_VERSION_')) {
     exit;
 }
+use Symfony\Component\HttpClient\HttpClient;
+
 
 class Usps_Api_Bridge extends Module
 {
@@ -354,46 +356,59 @@ class Usps_Api_Bridge extends Module
         $clientSecret = Configuration::get('USPS_BRIDGE_CLIENT_SECRET');
         $isLive = (bool)Configuration::get('USPS_BRIDGE_LIVE_MODE');
 
-        // URLs based on documentation (Verification pending next step)
+        // CORRECT URLs based on the OpenAPI Spec provided:
+        // Prod: https://apis.usps.com/oauth2/v3
+        // Test: https://apis-tem.usps.com/oauth2/v3
         $url = $isLive
-            ? 'https://api.usps.com/oauth2/v3/token'
-            : 'https://api-cat.usps.com/oauth2/v3/token';
+            ? 'https://apis.usps.com/oauth2/v3/token'
+            : 'https://apis-tem.usps.com/oauth2/v3/token';
 
         $this->log("Requesting New Token from: " . $url);
 
-        $ch = curl_init();
-        curl_setopt($ch, CURLOPT_URL, $url);
-        curl_setopt($ch, CURLOPT_POST, 1);
-        curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query([
-            'client_id' => $clientId,
-            'client_secret' => $clientSecret,
-            'grant_type' => 'client_credentials'
-        ]));
-        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
+        // Create Symfony Client
+        $client = HttpClient::create([
+            'timeout' => 10,
+            'verify_peer' => true, // Set to true in strict production environments
+            'verify_host' => false,
+        ]);
 
-        $response = curl_exec($ch);
-        $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
+        try {
+            $response = $client->request('POST', $url, [
+                'headers' => [
+                    'Content-Type' => 'application/json',
+                    'Accept' => 'application/json',
+                ],
+                // 'json' key automatically encodes the array to JSON and sets Content-Type
+                'json' => [
+                    'client_id' => $clientId,
+                    'client_secret' => $clientSecret,
+                    'grant_type' => 'client_credentials',
+                  // 'scope' => 'prices international-prices' // Specifying scope helps avoid ambiguity
+                ],
+            ]);
 
-        if (curl_errno($ch)) {
-            $this->log("CURL Error: " . curl_error($ch));
-       
-            return false;
-        }
-     
+            // Get status code
+            $statusCode = $response->getStatusCode();
 
-        $data = json_decode($response, true);
+            // Convert response to array (pass false to prevent throwing exceptions on 4xx/5xx)
+            $data = $response->toArray(false);
 
-        if ($httpCode == 200 && isset($data['access_token'])) {
-            $expiresIn = isset($data['expires_in']) ? (int)$data['expires_in'] : 3599;
+            if ($statusCode == 200 && isset($data['access_token'])) {
+                $expiresIn = isset($data['expires_in']) ? (int)$data['expires_in'] : 3599;
 
-            Configuration::updateValue('USPS_BRIDGE_ACCESS_TOKEN', $data['access_token']);
-            Configuration::updateValue('USPS_BRIDGE_TOKEN_EXPIRY', time() + $expiresIn);
+                Configuration::updateValue('USPS_BRIDGE_ACCESS_TOKEN', $data['access_token']);
+                Configuration::updateValue('USPS_BRIDGE_TOKEN_EXPIRY', time() + $expiresIn);
 
-            $this->log("Token refreshed successfully.");
-            return $data['access_token'];
+                $this->log("Token refreshed successfully.");
+                return $data['access_token'];
+            }
+
+            // Log detailed error from USPS
+            $this->log("Token Request Failed [HTTP $statusCode]: " . json_encode($data));
+        } catch (\Exception $e) {
+            $this->log("Symfony HTTP Client Error: " . $e->getMessage());
         }
 
-        $this->log("Token Request Failed: " . print_r($response, true));
         return false;
     }