backend/src/main/java/com/vaessl/app/connection/Endpoint.java

@@ -2,7 +2,7 @@ package com.vaessl.app.connection;
 
 public enum Endpoint {
     HOMEBOX_LOGIN("/api/v1/users/login"), LOGIN("/login"), CONNECTION_STATUS(
-            "/connections/status"), HOMEBOX_QUERY_ALL_ITEMS("/api/v1/items"), SEARCH("/search");
+            "/connections/status"), HOMEBOX_QUERY_ALL_ITEMS("/api/v1/entities"), SEARCH("/search");
 
     private final String value;
 

backend/src/main/java/com/vaessl/app/connection/HomeboxConnectionProvider.java

@@ -58,7 +58,7 @@ public class HomeboxConnectionProvider implements ConnectionProvider {
                 .body(HomeboxLoginResponse.class);
 
         if (hbResponse == null) {
-            throw new RemoteApiException(request.appUrl());
+            throw new RemoteApiException(request.appUrl(), HOMEBOX_LOGIN.getValue());
         }
 
         Map<String, Object> attachmentToken = new HashMap<>();

backend/src/main/java/com/vaessl/app/exception/ErrorMessage.java

@@ -16,7 +16,9 @@ public enum ErrorMessage {
                                                     HttpStatus.NOT_FOUND,
                                                     "No active connection found for this service."), REMOTE_API_EMPTY_RESPONSE(
                                                             HttpStatus.BAD_GATEWAY,
-                                                            "Remote API returned empty response for ");
+                                                            "Remote API returned empty response for "), REMOTE_API_CLIENT_ERROR(
+                                                                    HttpStatus.BAD_GATEWAY,
+                                                                    "Remote API returned an unexpected error: ");
 
     private final HttpStatus status;
     private final String message;

backend/src/main/java/com/vaessl/app/exception/GlobalExceptionHandler.java

@@ -1,5 +1,7 @@
 package com.vaessl.app.exception;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.http.ProblemDetail;
 import org.springframework.validation.FieldError;
 import org.springframework.web.bind.MethodArgumentNotValidException;
@@ -16,6 +18,8 @@ import java.util.stream.Collectors;
 @RestControllerAdvice
 public class GlobalExceptionHandler {
 
+    private static final Logger log = LoggerFactory.getLogger(GlobalExceptionHandler.class);
+
     @ExceptionHandler(MethodArgumentNotValidException.class)
     public ProblemDetail handleEmptyCredentialInput(MethodArgumentNotValidException e) {
 
@@ -33,6 +37,15 @@ public class GlobalExceptionHandler {
                 UNAUTHORIZED_WRONG_LOGIN.getMessage());
     }
 
+    // Catches any other 4xx from a remote API (e.g. 404 caused by a changed endpoint).
+    // Must come after the Unauthorized handler so Spring matches 401 there first.
+    @ExceptionHandler(HttpClientErrorException.class)
+    public ProblemDetail handleRemoteClientError(HttpClientErrorException e) {
+        log.error("Remote API returned {}: {}", e.getStatusCode(), e.getResponseBodyAsString());
+        return ProblemDetail.forStatusAndDetail(REMOTE_API_CLIENT_ERROR.getStatus(),
+                REMOTE_API_CLIENT_ERROR.getMessage() + e.getStatusCode());
+    }
+
     @ExceptionHandler(ResourceAccessException.class)
     public ProblemDetail handleNoConnection(ResourceAccessException e) {
 
@@ -42,7 +55,7 @@ public class GlobalExceptionHandler {
 
     @ExceptionHandler(HttpServerErrorException.class)
     public ProblemDetail handleTimeoutOrNotFound(HttpServerErrorException e) {
-
+        log.error("Remote API server error {}: {}", e.getStatusCode(), e.getResponseBodyAsString());
         return ProblemDetail.forStatusAndDetail(e.getStatusCode(),
                 SERVER_ERROR_GENERAL.getMessage() + e.getStatusText());
     }
@@ -61,12 +74,14 @@ public class GlobalExceptionHandler {
 
     @ExceptionHandler(ConnectionNotFoundException.class)
     public ProblemDetail handleConnectionNotFound(ConnectionNotFoundException e) {
-        return ProblemDetail.forStatusAndDetail(CONNECTION_NOT_FOUND.getStatus(), CONNECTION_NOT_FOUND.getMessage());
+        return ProblemDetail.forStatusAndDetail(CONNECTION_NOT_FOUND.getStatus(),
+                CONNECTION_NOT_FOUND.getMessage());
     }
 
     @ExceptionHandler(RemoteApiException.class)
     public ProblemDetail handleRemoteApiException(RemoteApiException e) {
+        log.error("Remote API empty body: {}{}", e.getAppUrl(), e.getPath());
         return ProblemDetail.forStatusAndDetail(REMOTE_API_EMPTY_RESPONSE.getStatus(),
-                REMOTE_API_EMPTY_RESPONSE.getMessage() + e.getAppUrl());
+                REMOTE_API_EMPTY_RESPONSE.getMessage() + e.getAppUrl() + e.getPath());
     }
 }

backend/src/main/java/com/vaessl/app/exception/RemoteApiException.java

@@ -1,11 +1,16 @@
 package com.vaessl.app.exception;
 
 import lombok.Getter;
-import lombok.RequiredArgsConstructor;
 
 @Getter
-@RequiredArgsConstructor
 public class RemoteApiException extends RuntimeException {
 
     private final String appUrl;
+    private final String path;
+
+    public RemoteApiException(String appUrl, String path) {
+        super("Remote API returned empty body: " + appUrl + path);
+        this.appUrl = appUrl;
+        this.path = path;
+    }
 }

backend/src/main/java/com/vaessl/app/search/HomeboxSearchProvider.java

@@ -50,17 +50,17 @@ public class HomeboxSearchProvider implements SearchProvider {
                         .queryParam("q", request.query())
                         .queryParam("page", pageable.getPageNumber() + 1)
                         .queryParam("pageSize", pageable.getPageSize()).build())
-                .headers(h -> h.setBearerAuth(
+                .headers(h -> h.setBearerAuth(hbEntity.getToken())).retrieve()
-                        hbEntity.getToken())).retrieve().body(HomeboxSearchResponse.class);
+                .body(HomeboxSearchResponse.class);
 
         if (hbResponse == null) {
-            throw new RemoteApiException(request.appUrl());
+            throw new RemoteApiException(request.appUrl(), HOMEBOX_QUERY_ALL_ITEMS.getValue());
         }
 
         List<SearchResponse> items = hbResponse.items().stream().map(i -> {
             String title = i.name();
             String description = i.description();
-            Map<String, Object> extraSearchResponseData = Map.of("location", i.location());
+            Map<String, Object> extraSearchResponseData = Map.of("location", i.parent());
             return new SearchResponse(title, description, extraSearchResponseData);
         }).toList();
 
@@ -71,7 +71,7 @@ public class HomeboxSearchProvider implements SearchProvider {
             List<HomeboxItem> items) {
     }
 
-    private record HomeboxItem(String name, String description, HomeboxLocation location) {
+    private record HomeboxItem(String name, String description, HomeboxLocation parent) {
     }
 
     private record HomeboxLocation(String name, String description) {

backend/src/test/java/com/vaessl/app/search/SearchControllerTest.java

@@ -57,7 +57,7 @@ class SearchControllerTest {
                         "createdAt": "2026-05-13T19:52:20.016176Z",
                         "updatedAt": "2026-05-14T12:39:11.836403Z",
                         "purchasePrice": 0,
-                        "location": {
+                        "parent": {
                             "id": "b6f60ab8-3a2a-4a8d-a4bf-897d0555f636",
                             "name": "Server Schrank Ikea weiß",
                             "description": "Weißer Ikea Schrank, wo sich der Server befindet.",