diff --git a/.gitignore b/.gitignore
index 9dbe206..1ca1eda 100644
--- a/.gitignore
+++ b/.gitignore
@@ -46,3 +46,7 @@ api-sandbox/app/api.spec.json
 /xcpdata.trace.db
 web-ui/vue-app/TODO.md
 web-ui/vue-app/src/generated/*
+/api-sandbox/src/main/resources/htdocs/api-sandbox/
+api-sandbox/app/dist/api.spec.json
+api-sandbox/app/node/
+api.spec.json
diff --git a/api-sandbox/app/main.js b/api-sandbox/app/main.js
index b710857..81e646e 100644
--- a/api-sandbox/app/main.js
+++ b/api-sandbox/app/main.js
@@ -2,6 +2,7 @@ import $ from 'jquery'
 
 let apiSpec = null
 let currentUser = null
+const apiEndpoint = "/api";
 
 async function loadUserProfile() {
     try {
@@ -12,7 +13,7 @@ async function loadUserProfile() {
             id: Date.now()
         }
 
-        const response = await fetch('http://localhost:8080/api', {
+        const response = await fetch(apiEndpoint, {
             method: 'POST',
             headers: {
                 'Content-Type': 'application/json'
@@ -215,7 +216,7 @@ async function sendRequest() {
     $('#request').text('')
 
     try {
-        const response = await fetch('http://localhost:8080/api', {
+        const response = await fetch(apiEndpoint, {
             method: 'POST',
             headers: {
                 'Content-Type': 'application/json'
diff --git a/api-sandbox/app/vite.config.js b/api-sandbox/app/vite.config.js
index 30f647c..c826595 100644
--- a/api-sandbox/app/vite.config.js
+++ b/api-sandbox/app/vite.config.js
@@ -5,7 +5,7 @@ import copy from 'rollup-plugin-copy'
 export default defineConfig({
   root: '.',
   build: {
-    outDir: 'dist',
+    outDir: '../src/main/resources/htdocs/api-sandbox',
     rollupOptions: {
       plugins: [
         copy({
diff --git a/api-sandbox/pom.xml b/api-sandbox/pom.xml
index 5976d02..9ee28ae 100644
--- a/api-sandbox/pom.xml
+++ b/api-sandbox/pom.xml
@@ -17,4 +17,48 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     </properties>
 
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>com.github.eirslett</groupId>
+                <artifactId>frontend-maven-plugin</artifactId>
+                <version>1.15.0</version>
+                <configuration>
+                    <workingDirectory>app</workingDirectory>
+                    <installDirectory>app</installDirectory>
+                </configuration>
+                <executions>
+                    <execution>
+                        <id>install node and npm</id>
+                        <goals>
+                            <goal>install-node-and-npm</goal>
+                        </goals>
+                        <configuration>
+                            <nodeVersion>v22.12.0</nodeVersion>
+                            <npmVersion>10.8.2</npmVersion>
+                        </configuration>
+                    </execution>
+                    <execution>
+                        <id>npm install</id>
+                        <goals>
+                            <goal>npm</goal>
+                        </goals>
+                        <configuration>
+                            <arguments>install</arguments>
+                        </configuration>
+                    </execution>
+                    <execution>
+                        <id>npm build</id>
+                        <goals>
+                            <goal>npm</goal>
+                        </goals>
+                        <configuration>
+                            <arguments>run build</arguments>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+
 </project>
\ No newline at end of file
diff --git a/api-spec-generator/src/main/java/ru/kirillius/XCP/ApiGenerator/SpecGenerator.java b/api-spec-generator/src/main/java/ru/kirillius/XCP/ApiGenerator/SpecGenerator.java
index 54353cb..6b0212b 100644
--- a/api-spec-generator/src/main/java/ru/kirillius/XCP/ApiGenerator/SpecGenerator.java
+++ b/api-spec-generator/src/main/java/ru/kirillius/XCP/ApiGenerator/SpecGenerator.java
@@ -122,9 +122,28 @@ public class SpecGenerator {
                 continue;
             }
 
+            for (var aClass : classAnnotation.directInheritors()) {
+                if (!types.contains(aClass)) {
+                    types.add(aClass);
+                    typesQueue.add(aClass);
+                }
+            }
+
             var typeDescriptor = typesArray.addObject();
             typeDescriptor.put("name", classAnnotation.alias().isEmpty() ? type.getSimpleName() : classAnnotation.alias());
             typeDescriptor.put("type", "class");
+            var parents = typeDescriptor.putArray("parents");
+            for (var aClass : type.getInterfaces()) {
+                if (!types.contains(aClass)) {
+                    types.add(aClass);
+                    typesQueue.add(aClass);
+                }
+                if (!aClass.isAnnotationPresent(GenerateApiSpec.class)) {
+                    continue;
+                }
+                parents.add(aClass.getSimpleName());
+            }
+
             var fields = typeDescriptor.putArray("fields");
             for (var method : type.getMethods()) {
                 var methodAnnotation = method.getAnnotation(GenerateApiSpec.class);
diff --git a/api/src/main/java/ru/kirillius/XCP/Commons/GenerateApiSpec.java b/api/src/main/java/ru/kirillius/XCP/Commons/GenerateApiSpec.java
index be9bae8..bd69736 100644
--- a/api/src/main/java/ru/kirillius/XCP/Commons/GenerateApiSpec.java
+++ b/api/src/main/java/ru/kirillius/XCP/Commons/GenerateApiSpec.java
@@ -11,4 +11,6 @@ public @interface GenerateApiSpec {
     String alias() default "";
 
     Class<?> type() default void.class;
+
+    Class<?>[] directInheritors() default {};
 }