diff --git a/app/Http/Controllers/Api/ApplicationsController.php b/app/Http/Controllers/Api/ApplicationsController.php
index a6056f82f..3c94ee57f 100644
--- a/app/Http/Controllers/Api/ApplicationsController.php
+++ b/app/Http/Controllers/Api/ApplicationsController.php
@@ -1141,7 +1141,7 @@ private function create_application(Request $request, $type)
                 $request->offsetUnset('docker_compose_domains');
             }
             if ($dockerComposeDomainsJson->count() > 0) {
-                $application->docker_compose_domains = $dockerComposeDomainsJson;
+                $application->docker_compose_domains = json_encode($dockerComposeDomainsJson);
             }
             $repository_url_parsed = Url::fromString($request->git_repository);
             $git_host = $repository_url_parsed->getHost();
@@ -1382,7 +1382,7 @@ private function create_application(Request $request, $type)
                 $request->offsetUnset('docker_compose_domains');
             }
             if ($dockerComposeDomainsJson->count() > 0) {
-                $application->docker_compose_domains = $dockerComposeDomainsJson;
+                $application->docker_compose_domains = json_encode($dockerComposeDomainsJson);
             }
             $application->fqdn = $fqdn;
             $application->git_repository = str($gitRepository)->trim()->toString();
@@ -1595,7 +1595,7 @@ private function create_application(Request $request, $type)
                 $request->offsetUnset('docker_compose_domains');
             }
             if ($dockerComposeDomainsJson->count() > 0) {
-                $application->docker_compose_domains = $dockerComposeDomainsJson;
+                $application->docker_compose_domains = json_encode($dockerComposeDomainsJson);
             }
             $application->fqdn = $fqdn;
             $application->private_key_id = $privateKey->id;
diff --git a/bootstrap/helpers/parsers.php b/bootstrap/helpers/parsers.php
index 999919991..ff1d6563e 100644
--- a/bootstrap/helpers/parsers.php
+++ b/bootstrap/helpers/parsers.php
@@ -501,6 +501,40 @@ function applicationParser(Application $resource, int $pull_request_id = 0, ?int
                         'is_preview' => false,
                     ]);
                 }
+
+            }
+
+            // Also populate docker_compose_domains for dockercompose apps from direct SERVICE_* declarations.
+            if ($resource->build_pack === 'dockercompose' && ($key->startsWith('SERVICE_FQDN_') || $key->startsWith('SERVICE_URL_'))) {
+                $parsed = parseServiceEnvironmentVariable($key->value());
+                $normalizedServiceName = str($parsed['service_name'])->replace('-', '_')->replace('.', '_')->value();
+                $serviceExists = false;
+                foreach (array_keys($services) as $serviceNameKey) {
+                    if (str($serviceNameKey)->replace('-', '_')->replace('.', '_')->value() === $normalizedServiceName) {
+                        $serviceExists = true;
+                        break;
+                    }
+                }
+                if ($serviceExists) {
+                    $domains = collect(json_decode(data_get($resource, 'docker_compose_domains') ?: '[]'));
+                    $domainExists = data_get($domains->get($normalizedServiceName), 'domain');
+                    if (is_null($domainExists)) {
+                        $serviceNameForDomain = str($parsed['service_name'])->replace('_', '-')->value();
+                        $domainValue = generateUrl(server: $server, random: "$serviceNameForDomain-$uuid");
+                        if ($value && get_class($value) === Illuminate\Support\Stringable::class && $value->startsWith('/')) {
+                            $path = $value->value();
+                            if ($path !== '/') {
+                                $domainValue = "$domainValue$path";
+                            }
+                        }
+                        if ($parsed['port'] && is_numeric($parsed['port'])) {
+                            $domainValue = "$domainValue:{$parsed['port']}";
+                        }
+                        $domains->put($normalizedServiceName, ['domain' => $domainValue]);
+                        $resource->docker_compose_domains = $domains->toJson();
+                        $resource->save();
+                    }
+                }
             }
         }
 
@@ -608,7 +642,7 @@ function applicationParser(Application $resource, int $pull_request_id = 0, ?int
 
                         // Only add domain if the service exists
                         if ($serviceExists) {
-                            $domains = collect(json_decode(data_get($resource, 'docker_compose_domains'))) ?? collect([]);
+                            $domains = collect(json_decode(data_get($resource, 'docker_compose_domains') ?: '[]'));
                             $domainExists = data_get($domains->get($serviceName), 'domain');
 
                             // Update domain using URL with port if applicable
diff --git a/tests/Feature/ApplicationParserDockerComposeDomainsTest.php b/tests/Feature/ApplicationParserDockerComposeDomainsTest.php
new file mode 100644
index 000000000..00ae2d2ff
--- /dev/null
+++ b/tests/Feature/ApplicationParserDockerComposeDomainsTest.php
@@ -0,0 +1,289 @@
+<?php
+
+use App\Models\Application;
+use App\Models\Environment;
+use App\Models\PrivateKey;
+use App\Models\Project;
+use App\Models\Server;
+use App\Models\ServerSetting;
+use App\Models\StandaloneDocker;
+use App\Models\Team;
+use App\Models\User;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use phpseclib3\Crypt\EC;
+
+uses(RefreshDatabase::class);
+
+beforeEach(function () {
+    $this->user = User::factory()->create();
+    $this->team = Team::factory()->create();
+    $this->user->teams()->attach($this->team);
+
+    $this->project = Project::factory()->create(['team_id' => $this->team->id]);
+    $this->environment = Environment::factory()->create([
+        'project_id' => $this->project->id,
+    ]);
+
+    $ecKey = EC::createKey('Ed25519');
+    $privateKeyContent = $ecKey->toString('OpenSSH');
+
+    $privateKey = PrivateKey::create([
+        'name' => 'test-key',
+        'private_key' => $privateKeyContent,
+        'team_id' => $this->team->id,
+    ]);
+
+    $this->server = Server::factory()->create([
+        'team_id' => $this->team->id,
+        'private_key_id' => $privateKey->id,
+    ]);
+
+    ServerSetting::create([
+        'server_id' => $this->server->id,
+        'wildcard_domain' => 'http://127.0.0.1.sslip.io',
+    ]);
+
+    $this->destination = StandaloneDocker::factory()->create([
+        'server_id' => $this->server->id,
+        'network' => 'test-network-'.fake()->uuid(),
+    ]);
+});
+
+test('applicationParser populates docker_compose_domains for KEY-based SERVICE_FQDN variables', function () {
+    $dockerCompose = <<<'YAML'
+services:
+  backend:
+    image: myapp/backend:latest
+    environment:
+      - SERVICE_FQDN_BACKEND_8000=${BACKEND_URL}
+  frontend:
+    image: myapp/frontend:latest
+    environment:
+      - SERVICE_FQDN_FRONTEND=${FRONTEND_URL}
+YAML;
+
+    $application = Application::factory()->create([
+        'environment_id' => $this->environment->id,
+        'destination_id' => $this->destination->id,
+        'destination_type' => StandaloneDocker::class,
+        'build_pack' => 'dockercompose',
+        'docker_compose_raw' => $dockerCompose,
+        'fqdn' => null,
+        'docker_compose_domains' => null,
+    ]);
+
+    applicationParser($application);
+
+    $application->refresh();
+
+    $domains = json_decode($application->docker_compose_domains, true);
+
+    expect($domains)->not->toBeNull()
+        ->and($domains)->toBeArray()
+        ->and($domains)->toHaveKey('backend')
+        ->and($domains['backend'])->toHaveKey('domain')
+        ->and($domains['backend']['domain'])->toStartWith('http://')
+        ->and($domains['backend']['domain'])->not->toBeEmpty();
+});
+
+test('applicationParser populates docker_compose_domains for KEY-based SERVICE_FQDN without port', function () {
+    $dockerCompose = <<<'YAML'
+services:
+  frontend:
+    image: myapp/frontend:latest
+    environment:
+      - SERVICE_FQDN_FRONTEND=${FRONTEND_URL}
+YAML;
+
+    $application = Application::factory()->create([
+        'environment_id' => $this->environment->id,
+        'destination_id' => $this->destination->id,
+        'destination_type' => StandaloneDocker::class,
+        'build_pack' => 'dockercompose',
+        'docker_compose_raw' => $dockerCompose,
+        'fqdn' => null,
+        'docker_compose_domains' => null,
+    ]);
+
+    applicationParser($application);
+
+    $application->refresh();
+
+    $domains = json_decode($application->docker_compose_domains, true);
+
+    expect($domains)->not->toBeNull()
+        ->and($domains)->toHaveKey('frontend')
+        ->and($domains['frontend'])->toHaveKey('domain');
+});
+
+test('applicationParser does not populate docker_compose_domains for non-dockercompose build_pack', function () {
+    $dockerCompose = <<<'YAML'
+services:
+  backend:
+    image: myapp/backend:latest
+    environment:
+      - SERVICE_FQDN_BACKEND_8000=${BACKEND_URL}
+YAML;
+
+    $application = Application::factory()->create([
+        'environment_id' => $this->environment->id,
+        'destination_id' => $this->destination->id,
+        'destination_type' => StandaloneDocker::class,
+        'build_pack' => 'dockerfile',
+        'docker_compose_raw' => $dockerCompose,
+        'fqdn' => null,
+        'docker_compose_domains' => null,
+    ]);
+
+    applicationParser($application);
+
+    $application->refresh();
+
+    // For non-dockercompose, docker_compose_domains should remain empty
+    $domains = json_decode($application->docker_compose_domains, true);
+    expect($domains)->toBeNull();
+});
+
+test('applicationParser populates docker_compose_domains for KEY-based SERVICE_URL variables', function () {
+    $dockerCompose = <<<'YAML'
+services:
+  frontend:
+    image: myapp/frontend:latest
+    environment:
+      - SERVICE_URL_FRONTEND=/ui
+YAML;
+
+    $application = Application::factory()->create([
+        'environment_id' => $this->environment->id,
+        'destination_id' => $this->destination->id,
+        'destination_type' => StandaloneDocker::class,
+        'build_pack' => 'dockercompose',
+        'docker_compose_raw' => $dockerCompose,
+        'fqdn' => null,
+        'docker_compose_domains' => null,
+    ]);
+
+    applicationParser($application);
+
+    $application->refresh();
+
+    $domains = json_decode($application->docker_compose_domains, true);
+
+    expect($domains)->not->toBeNull()
+        ->and($domains)->toHaveKey('frontend')
+        ->and($domains['frontend']['domain'])->toStartWith('http://')
+        ->and($domains['frontend']['domain'])->toEndWith('/ui');
+});
+
+test('applicationParser preserves existing docker_compose_domains entries', function () {
+    $dockerCompose = <<<'YAML'
+services:
+  backend:
+    image: myapp/backend:latest
+    environment:
+      - SERVICE_FQDN_BACKEND_8000=${BACKEND_URL}
+  frontend:
+    image: myapp/frontend:latest
+    environment:
+      - SERVICE_URL_FRONTEND=/ui
+YAML;
+
+    $application = Application::factory()->create([
+        'environment_id' => $this->environment->id,
+        'destination_id' => $this->destination->id,
+        'destination_type' => StandaloneDocker::class,
+        'build_pack' => 'dockercompose',
+        'docker_compose_raw' => $dockerCompose,
+        'fqdn' => null,
+        'docker_compose_domains' => json_encode([
+            'frontend' => ['domain' => 'https://existing.example.com'],
+        ]),
+    ]);
+
+    applicationParser($application);
+
+    $application->refresh();
+
+    $domains = json_decode($application->docker_compose_domains, true);
+
+    expect($domains['frontend']['domain'])->toBe('https://existing.example.com')
+        ->and($domains)->toHaveKey('backend')
+        ->and($domains['backend']['domain'])->toStartWith('http://');
+});
+
+test('applicationParser handles other docker compose domain shapes without regressions', function () {
+    $createApplication = function (string $dockerCompose, ?string $dockerComposeDomains = null): Application {
+        return Application::factory()->create([
+            'environment_id' => $this->environment->id,
+            'destination_id' => $this->destination->id,
+            'destination_type' => StandaloneDocker::class,
+            'build_pack' => 'dockercompose',
+            'docker_compose_raw' => $dockerCompose,
+            'fqdn' => null,
+            'docker_compose_domains' => $dockerComposeDomains,
+        ]);
+    };
+
+    $valueBasedCompose = <<<'YAML'
+services:
+  backend:
+    image: myapp/backend:latest
+  frontend:
+    image: myapp/frontend:latest
+    environment:
+      API_URL: ${SERVICE_URL_BACKEND}
+YAML;
+
+    $valueBasedApplication = $createApplication($valueBasedCompose);
+    applicationParser($valueBasedApplication);
+    $valueBasedApplication->refresh();
+    $valueBasedDomains = json_decode($valueBasedApplication->docker_compose_domains, true);
+
+    expect($valueBasedDomains)->toHaveKey('backend')
+        ->and($valueBasedDomains['backend']['domain'])->toStartWith('http://')
+        ->and($valueBasedDomains)->not->toHaveKey('frontend');
+
+    $mapStyleCompose = <<<'YAML'
+services:
+  frontend:
+    image: myapp/frontend:latest
+    environment:
+      SERVICE_URL_FRONTEND: /ui
+YAML;
+
+    $mapStyleApplication = $createApplication($mapStyleCompose);
+    applicationParser($mapStyleApplication);
+    $mapStyleApplication->refresh();
+    $mapStyleDomains = json_decode($mapStyleApplication->docker_compose_domains, true);
+
+    expect($mapStyleDomains)->toHaveKey('frontend')
+        ->and($mapStyleDomains['frontend']['domain'])->toEndWith('/ui');
+
+    $missingServiceCompose = <<<'YAML'
+services:
+  worker:
+    image: myapp/worker:latest
+    environment:
+      SERVICE_URL_API: /api
+YAML;
+
+    $missingServiceApplication = $createApplication($missingServiceCompose);
+    applicationParser($missingServiceApplication);
+    $missingServiceApplication->refresh();
+
+    expect(json_decode($missingServiceApplication->docker_compose_domains, true))->toBeNull();
+
+    $plainCompose = <<<'YAML'
+services:
+  worker:
+    image: myapp/worker:latest
+    environment:
+      FOO: bar
+YAML;
+
+    $plainApplication = $createApplication($plainCompose);
+    applicationParser($plainApplication);
+    $plainApplication->refresh();
+
+    expect(json_decode($plainApplication->docker_compose_domains, true))->toBeNull();
+});