diff --git a/app/Domains/Tenant/Controllers/AdminApp/WebsiteExtraController.php b/app/Domains/Tenant/Controllers/AdminApp/WebsiteExtraController.php
new file mode 100644
index 0000000..9ce51dd
--- /dev/null
+++ b/app/Domains/Tenant/Controllers/AdminApp/WebsiteExtraController.php
@@ -0,0 +1,50 @@
+<?php
+
+namespace App\Domains\Tenant\Controllers\AdminApp;
+
+use App\Domains\Auth\Models\User;
+use App\Domains\Tenant\Models\Tenant;
+use App\Domains\Tenant\Requests\AdminApp\UpdateWebsiteExtrasRequest;
+use App\Domains\Tenant\Resources\AdminApp\WebsiteExtrasResource;
+use App\Domains\Tenant\Services\TenantInformationService;
+use App\Domains\Tenant\Services\WebsiteExtraService;
+use App\Http\Controllers\Controller;
+use Illuminate\Http\Request;
+
+class WebsiteExtraController extends Controller
+{
+    public function __construct(
+        protected WebsiteExtraService $websiteExtraService,
+        protected TenantInformationService $tenantInformationService,
+    ) {}
+
+    public function show(Request $request): WebsiteExtrasResource
+    {
+        return WebsiteExtrasResource::make(
+            $this->loadTenant($request->user())
+        );
+    }
+
+    public function update(UpdateWebsiteExtrasRequest $request): WebsiteExtrasResource
+    {
+        $tenant = $request->user()->tenant()->firstOrFail();
+
+        $this->websiteExtraService->replaceForTenant(
+            $tenant,
+            $request->validated('extras', [])
+        );
+
+        return WebsiteExtrasResource::make(
+            $this->loadTenant($request->user())
+        );
+    }
+
+    private function loadTenant(User $user): Tenant
+    {
+        $tenant = $user->tenant()->firstOrFail();
+
+        return $this->tenantInformationService->load($tenant, [
+            'websiteType.extras',
+        ]);
+    }
+}
diff --git a/app/Domains/Tenant/Requests/AdminApp/UpdateWebsiteExtrasRequest.php b/app/Domains/Tenant/Requests/AdminApp/UpdateWebsiteExtrasRequest.php
new file mode 100644
index 0000000..c063648
--- /dev/null
+++ b/app/Domains/Tenant/Requests/AdminApp/UpdateWebsiteExtrasRequest.php
@@ -0,0 +1,24 @@
+<?php
+
+namespace App\Domains\Tenant\Requests\AdminApp;
+
+use App\Domains\Tenant\Services\WebsiteExtraService;
+use Illuminate\Foundation\Http\FormRequest;
+
+class UpdateWebsiteExtrasRequest extends FormRequest
+{
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    /**
+     * @return array<string, mixed>
+     */
+    public function rules(): array
+    {
+        return app(WebsiteExtraService::class)->requestRules(
+            $this->user()?->tenant?->website_type_code
+        );
+    }
+}
diff --git a/app/Domains/Tenant/Resources/AdminApp/WebsiteExtrasResource.php b/app/Domains/Tenant/Resources/AdminApp/WebsiteExtrasResource.php
new file mode 100644
index 0000000..e979d0d
--- /dev/null
+++ b/app/Domains/Tenant/Resources/AdminApp/WebsiteExtrasResource.php
@@ -0,0 +1,67 @@
+<?php
+
+namespace App\Domains\Tenant\Resources\AdminApp;
+
+use App\Domains\Attachable\Models\Attachment;
+use App\Domains\Tenant\Models\Tenant;
+use Illuminate\Http\Request;
+use Illuminate\Http\Resources\Json\JsonResource;
+
+/**
+ * @mixin Tenant
+ */
+class WebsiteExtrasResource extends JsonResource
+{
+    /**
+     * @return array<string, mixed>
+     */
+    public function toArray(Request $request): array
+    {
+        $websiteExtras = $this->websiteExtras->keyBy(
+            fn ($extra) => $extra->websiteTypeExtra->nombre
+        );
+
+        return [
+            'website_type' => $this->websiteType ? [
+                'codigo' => $this->websiteType->codigo,
+                'nombre' => $this->websiteType->nombre,
+            ] : null,
+            'definitions' => $this->websiteType?->extras
+                ->mapWithKeys(fn ($definition) => [
+                    $definition->nombre => [
+                        'descripcion' => $definition->descripcion,
+                        'is_required' => $definition->is_required,
+                        'request_rules' => $definition->config_schema['request_rules'] ?? [],
+                    ],
+                ]) ?? [],
+            'extras' => $websiteExtras->mapWithKeys(fn ($extra) => [
+                $extra->websiteTypeExtra->nombre => $this->formatConfig(
+                    $extra->resolvedConfig(),
+                    fn (Attachment $attachment): string => $attachment->key
+                ),
+            ]),
+            'resolved_extras' => $websiteExtras->mapWithKeys(fn ($extra) => [
+                $extra->websiteTypeExtra->nombre => $this->formatConfig(
+                    $extra->resolvedConfig(),
+                    fn (Attachment $attachment): string => $attachment->getTemporaryUrl(1440)
+                ),
+            ]),
+        ];
+    }
+
+    private function formatConfig(mixed $value, callable $formatAttachment): mixed
+    {
+        if ($value instanceof Attachment) {
+            return $formatAttachment($value);
+        }
+
+        if (! is_array($value)) {
+            return $value;
+        }
+
+        return array_map(
+            fn (mixed $item): mixed => $this->formatConfig($item, $formatAttachment),
+            $value
+        );
+    }
+}
diff --git a/app/Domains/Tenant/Services/WebsiteExtraService.php b/app/Domains/Tenant/Services/WebsiteExtraService.php
index 443ff25..ecd10e8 100644
--- a/app/Domains/Tenant/Services/WebsiteExtraService.php
+++ b/app/Domains/Tenant/Services/WebsiteExtraService.php
@@ -10,6 +10,7 @@ use App\Domains\Tenant\Models\Tenant;
 use App\Domains\Tenant\Models\WebsiteType;
 use App\Domains\Tenant\Models\WebsiteTypeExtra;
 use Illuminate\Support\Collection;
+use Illuminate\Support\Facades\DB;
 use Illuminate\Support\Facades\Validator;
 use Illuminate\Support\Str;
 use Illuminate\Validation\ValidationException;
@@ -118,6 +119,21 @@ class WebsiteExtraService
         $tenant->unsetRelation('websiteExtras');
     }
 
+    /**
+     * Replace all configured extras for a tenant.
+     *
+     * @param  array<string, mixed>  $extras
+     */
+    public function replaceForTenant(Tenant $tenant, array $extras): void
+    {
+        DB::transaction(function () use ($tenant, $extras): void {
+            $tenant->websiteExtras()->delete();
+            $this->createForTenant($tenant, $extras);
+        });
+
+        $tenant->unsetRelation('websiteExtras');
+    }
+
     /**
      * @return Collection<int, WebsiteTypeExtra>
      */
diff --git a/app/Domains/Tenant/routes/adminapp.php b/app/Domains/Tenant/routes/adminapp.php
new file mode 100644
index 0000000..14ae745
--- /dev/null
+++ b/app/Domains/Tenant/routes/adminapp.php
@@ -0,0 +1,13 @@
+<?php
+
+use App\Domains\Tenant\Controllers\AdminApp\WebsiteExtraController;
+use Illuminate\Support\Facades\Route;
+
+Route::prefix('v1/adminapp/tenant')
+    ->middleware(['auth:sanctum', 'adminapp.tenant'])
+    ->group(function (): void {
+        Route::get('website-extras', [WebsiteExtraController::class, 'show'])
+            ->name('adminapp.tenant.website-extras.show');
+        Route::put('website-extras', [WebsiteExtraController::class, 'update'])
+            ->name('adminapp.tenant.website-extras.update');
+    });
diff --git a/app/Domains/Tenant/routes/api.php b/app/Domains/Tenant/routes/api.php
index 69464a8..cc12f08 100644
--- a/app/Domains/Tenant/routes/api.php
+++ b/app/Domains/Tenant/routes/api.php
@@ -8,3 +8,5 @@ Route::get('tenants/bootstrap/{dominio}', BootstrapTenantController::class)
     ->where('dominio', '.*');
 
 Route::apiResource('tenants', TenantController::class);
+
+require __DIR__.'/adminapp.php';
diff --git a/app/Http/Middleware/EnsureAdminAppTenant.php b/app/Http/Middleware/EnsureAdminAppTenant.php
new file mode 100644
index 0000000..83c5c68
--- /dev/null
+++ b/app/Http/Middleware/EnsureAdminAppTenant.php
@@ -0,0 +1,30 @@
+<?php
+
+namespace App\Http\Middleware;
+
+use App\Domains\Authorization\Enums\RoleCode;
+use Closure;
+use Illuminate\Auth\Access\AuthorizationException;
+use Illuminate\Http\Request;
+use Symfony\Component\HttpFoundation\Response;
+
+class EnsureAdminAppTenant
+{
+    /**
+     * Ensure the authenticated user is an AdminApp user bound to a tenant.
+     */
+    public function handle(Request $request, Closure $next): Response
+    {
+        $user = $request->user();
+
+        if (
+            ! $user
+            || $user->rol_codigo !== RoleCode::AdminApp->value
+            || ! $user->tenant_codigo
+        ) {
+            throw new AuthorizationException;
+        }
+
+        return $next($request);
+    }
+}
diff --git a/bootstrap/app.php b/bootstrap/app.php
index f240d99..01e3e9d 100644
--- a/bootstrap/app.php
+++ b/bootstrap/app.php
@@ -2,6 +2,7 @@
 
 use App\Domains\Auth\Exceptions\AccountLockedException;
 use App\Domains\Ticket\Exceptions\TicketNotAvailableException;
+use App\Http\Middleware\EnsureAdminAppTenant;
 use App\Http\Middleware\SetApiLocale;
 use Illuminate\Auth\Access\AuthorizationException;
 use Illuminate\Auth\AuthenticationException;
@@ -21,6 +22,9 @@ return Application::configure(basePath: dirname(__DIR__))
         health: '/up',
     )
     ->withMiddleware(function (Middleware $middleware): void {
+        $middleware->alias([
+            'adminapp.tenant' => EnsureAdminAppTenant::class,
+        ]);
         $middleware->encryptCookies(except: [
             'guest_token',
         ]);
diff --git a/tests/Feature/Tenant/AdminAppWebsiteExtraControllerTest.php b/tests/Feature/Tenant/AdminAppWebsiteExtraControllerTest.php
new file mode 100644
index 0000000..a783a2d
--- /dev/null
+++ b/tests/Feature/Tenant/AdminAppWebsiteExtraControllerTest.php
@@ -0,0 +1,155 @@
+<?php
+
+namespace Tests\Feature\Tenant;
+
+use App\Domains\Auth\Models\User;
+use App\Domains\Authorization\Enums\RoleCode;
+use App\Domains\Tenant\Models\Tenant;
+use App\Domains\Tenant\Models\WebsiteType;
+use Database\Seeders\AuthorizationSeeder;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Laravel\Sanctum\Sanctum;
+use Tests\TestCase;
+
+class AdminAppWebsiteExtraControllerTest extends TestCase
+{
+    use RefreshDatabase;
+
+    private WebsiteType $websiteType;
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        $this->seed(AuthorizationSeeder::class);
+
+        $this->websiteType = WebsiteType::query()->create([
+            'codigo' => 'test-store',
+            'nombre' => 'Test Store',
+        ]);
+
+        $this->websiteType->extras()->create([
+            'nombre' => 'contactConfig',
+            'descripcion' => 'Datos de contacto visibles en la tienda.',
+            'is_required' => false,
+            'config_schema' => [
+                'request_rules' => [
+                    '$' => 'required|array',
+                    'phone' => 'required|string|max:30',
+                ],
+                'transforms' => [],
+                'database_rules' => [
+                    '$' => 'required|array',
+                    'phone' => 'required|string|max:30',
+                ],
+            ],
+        ]);
+    }
+
+    public function test_authentication_is_required(): void
+    {
+        $this->getJson('/api/v1/adminapp/tenant/website-extras')
+            ->assertUnauthorized();
+    }
+
+    public function test_a_customer_cannot_access_adminapp_website_extras(): void
+    {
+        $customer = User::factory()->create([
+            'rol_codigo' => RoleCode::User->value,
+            'tenant_codigo' => null,
+        ]);
+
+        Sanctum::actingAs($customer);
+
+        $this->getJson('/api/v1/adminapp/tenant/website-extras')
+            ->assertForbidden();
+    }
+
+    public function test_adminapp_user_can_read_definitions_and_current_values(): void
+    {
+        $tenant = $this->createTenant('acme');
+        $definition = $this->websiteType->extras()->firstOrFail();
+        $tenant->websiteExtras()->create([
+            'website_type_extra_id' => $definition->id,
+            'config' => ['phone' => '+54 341 555 0101'],
+        ]);
+
+        Sanctum::actingAs($this->createAdminAppUser($tenant));
+
+        $this->getJson('/api/v1/adminapp/tenant/website-extras')
+            ->assertOk()
+            ->assertJsonPath('data.website_type.codigo', 'test-store')
+            ->assertJsonPath('data.definitions.contactConfig.is_required', false)
+            ->assertJsonPath('data.extras.contactConfig.phone', '+54 341 555 0101')
+            ->assertJsonPath('data.resolved_extras.contactConfig.phone', '+54 341 555 0101');
+    }
+
+    public function test_adminapp_user_replaces_only_its_tenant_extras(): void
+    {
+        $tenant = $this->createTenant('acme');
+        $otherTenant = $this->createTenant('other');
+        $definition = $this->websiteType->extras()->firstOrFail();
+
+        $tenant->websiteExtras()->create([
+            'website_type_extra_id' => $definition->id,
+            'config' => ['phone' => 'old'],
+        ]);
+        $otherTenant->websiteExtras()->create([
+            'website_type_extra_id' => $definition->id,
+            'config' => ['phone' => 'untouched'],
+        ]);
+
+        Sanctum::actingAs($this->createAdminAppUser($tenant));
+
+        $this->putJson('/api/v1/adminapp/tenant/website-extras', [
+            'extras' => [
+                'contactConfig' => [
+                    'phone' => '+54 341 555 9999',
+                ],
+            ],
+        ])
+            ->assertOk()
+            ->assertJsonPath('data.extras.contactConfig.phone', '+54 341 555 9999');
+
+        $this->assertSame(
+            ['phone' => '+54 341 555 9999'],
+            $tenant->websiteExtras()->firstOrFail()->config
+        );
+        $this->assertSame(
+            ['phone' => 'untouched'],
+            $otherTenant->websiteExtras()->firstOrFail()->config
+        );
+    }
+
+    public function test_update_rejects_extras_not_supported_by_the_website_type(): void
+    {
+        $tenant = $this->createTenant('acme');
+        Sanctum::actingAs($this->createAdminAppUser($tenant));
+
+        $this->putJson('/api/v1/adminapp/tenant/website-extras', [
+            'extras' => [
+                'unknown' => ['enabled' => true],
+            ],
+        ])
+            ->assertUnprocessable()
+            ->assertJsonValidationErrors('extras');
+    }
+
+    private function createTenant(string $code): Tenant
+    {
+        return Tenant::query()->create([
+            'codigo' => $code,
+            'nombre' => ucfirst($code),
+            'dominio' => "{$code}.test",
+            'website_type_code' => $this->websiteType->codigo,
+        ]);
+    }
+
+    private function createAdminAppUser(Tenant $tenant): User
+    {
+        return User::factory()->create([
+            'rol_codigo' => RoleCode::AdminApp->value,
+            'tenant_codigo' => $tenant->codigo,
+        ]);
+    }
+}