diff --git a/api/src/main/java/fr/gameovergne/api/controller/PrestashopProxyController.java b/api/src/main/java/fr/gameovergne/api/controller/PrestashopProxyController.java
index 7b96290..c6ac16d 100644
--- a/api/src/main/java/fr/gameovergne/api/controller/PrestashopProxyController.java
+++ b/api/src/main/java/fr/gameovergne/api/controller/PrestashopProxyController.java
@@ -7,9 +7,6 @@ import org.springframework.web.bind.annotation.*;
 
 import fr.gameovergne.api.service.PrestashopClient;
 
-import java.util.stream.Collectors;
-
-
 @RestController
 @RequestMapping("/api/ps")
 @RequiredArgsConstructor
@@ -22,23 +19,7 @@ public class PrestashopProxyController {
             @PathVariable String resource,
             @RequestParam MultiValueMap<String, String> params
     ) {
-        String query = buildQuery(params);
-        String path = "/" + resource + query;
-
-        String body = prestashopClient.get(path);
+        String body = prestashopClient.get(resource, params);
         return ResponseEntity.ok(body);
     }
-
-    private String buildQuery(MultiValueMap<String, String> params) {
-        if (params == null || params.isEmpty()) {
-            return "";
-        }
-
-        String queryString = params.entrySet().stream()
-                .flatMap(e -> e.getValue().stream()
-                        .map(v -> e.getKey() + "=" + v))
-                .collect(Collectors.joining("&"));
-
-        return "?" + queryString;
-    }
 }
\ No newline at end of file
diff --git a/api/src/main/java/fr/gameovergne/api/service/PrestashopClient.java b/api/src/main/java/fr/gameovergne/api/service/PrestashopClient.java
index 917584f..3f95bd4 100644
--- a/api/src/main/java/fr/gameovergne/api/service/PrestashopClient.java
+++ b/api/src/main/java/fr/gameovergne/api/service/PrestashopClient.java
@@ -2,60 +2,64 @@ package fr.gameovergne.api.service;
 
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Value;
-import org.springframework.boot.web.client.RestTemplateBuilder;
-import org.springframework.http.HttpEntity;
-import org.springframework.http.HttpMethod;
+import org.springframework.http.*;
 import org.springframework.stereotype.Service;
+import org.springframework.util.MultiValueMap;
 import org.springframework.web.client.RestTemplate;
+import org.springframework.web.util.UriComponentsBuilder;
+
+import java.net.URI;
+import java.nio.charset.StandardCharsets;
+import java.util.Base64;
 
-@Slf4j
 @Service
+@Slf4j
 public class PrestashopClient {
 
-    private final RestTemplate restTemplate;
+    private final RestTemplate restTemplate = new RestTemplate();
+
     private final String baseUrl;
+    private final String apiKey;
 
     public PrestashopClient(
             @Value("${prestashop.base-url}") String baseUrl,
-            @Value("${prestashop.api-key}") String rawApiKey,
-            RestTemplateBuilder builder
+            @Value("${prestashop.api-key}") String apiKey
     ) {
-        if (baseUrl.endsWith("/")) {
-            baseUrl = baseUrl.substring(0, baseUrl.length() - 1);
-        }
         this.baseUrl = baseUrl;
+        this.apiKey = apiKey;
 
-        String apiKey = rawApiKey == null ? null : rawApiKey.trim();
-
-        if (apiKey == null || apiKey.isBlank()) {
-            throw new IllegalStateException(
-                    "PrestaShop API key is null/blank (prestashop.api-key)."
-            );
+        log.info("[PrestaShop] API key length = {}", apiKey != null ? apiKey.length() : 0);
+        if (apiKey != null && apiKey.length() >= 4) {
+            log.info("[PrestaShop] API key prefix = {}****", apiKey.substring(0, 4));
         }
-
-        log.info("[PrestaShop] API key length = {}", apiKey.length());
-        log.info("[PrestaShop] API key prefix = {}****", apiKey.substring(0, 4));
-
-        this.restTemplate = builder
-                .basicAuthentication(apiKey, "")
-                .build();
+        log.info("[PrestaShop] Base URL = {}", this.baseUrl);
     }
 
-    public String get(String pathAndQuery) {
-        String url;
+    public String get(String resource, MultiValueMap<String, String> params) {
+        UriComponentsBuilder builder = UriComponentsBuilder
+                .fromHttpUrl(baseUrl)
+                .pathSegment(resource);
 
-        if (pathAndQuery.startsWith("http://") || pathAndQuery.startsWith("https://")) {
-            url = pathAndQuery;
-        } else if (pathAndQuery.startsWith("/")) {
-            url = baseUrl + pathAndQuery;
-        } else {
-            url = baseUrl + "/" + pathAndQuery;
+        if (params != null) {
+            params.forEach((key, values) -> values.forEach(v -> builder.queryParam(key, v)));
         }
 
-        log.info("[PrestaShop] GET {}", url);
+        URI uri = builder.build(true).encode().toUri();
 
-        return restTemplate
-                .exchange(url, HttpMethod.GET, HttpEntity.EMPTY, String.class)
-                .getBody();
+        log.info("[PrestaShop] GET {}", uri);
+
+        HttpHeaders headers = new HttpHeaders();
+        headers.set(HttpHeaders.ACCEPT, MediaType.APPLICATION_JSON_VALUE);
+
+        // Auth Basic : "KEY:" base64
+        String auth = apiKey + ":";
+        String encodedAuth = Base64.getEncoder().encodeToString(auth.getBytes(StandardCharsets.UTF_8));
+        headers.set(HttpHeaders.AUTHORIZATION, "Basic " + encodedAuth);
+
+        HttpEntity<Void> entity = new HttpEntity<>(headers);
+
+        ResponseEntity<String> response = restTemplate.exchange(uri, HttpMethod.GET, entity, String.class);
+
+        return response.getBody();
     }
 }
\ No newline at end of file
diff --git a/api/src/main/resources/application.properties b/api/src/main/resources/application.properties
index 1fd482a..76903b7 100644
--- a/api/src/main/resources/application.properties
+++ b/api/src/main/resources/application.properties
@@ -12,5 +12,5 @@ spring.jpa.show-sql=true
 
 jwt.secret=a23ac96ce968bf13099d99410b951dd498118851bdfc996a3f844bd68b1b2afd
 
-prestashop.base-url=https://shop.gameovergne.fr
+prestashop.base-url=https://shop.gameovergne.fr/api
 prestashop.api-key=${PRESTASHOP_API_KEY}
\ No newline at end of file