diff --git a/fastapi_startkit/src/fastapi_startkit/fastapi/commands/serve_command.py b/fastapi_startkit/src/fastapi_startkit/fastapi/commands/serve_command.py
index be268cd5..2c847c79 100644
--- a/fastapi_startkit/src/fastapi_startkit/fastapi/commands/serve_command.py
+++ b/fastapi_startkit/src/fastapi_startkit/fastapi/commands/serve_command.py
@@ -1,6 +1,8 @@
-from fastapi_startkit.console.command import Command
 from cleo.helpers import option
 
+from fastapi_startkit.console.command import Command
+from fastapi_startkit.support import Uri
+
 
 class ServeCommand(Command):
     name = "serve"
@@ -42,15 +44,40 @@ def handle(self):
         from fastapi_startkit import Config
         from fastapi_startkit.container import Container
 
-        # Resolve server settings: CLI flag > fastapi config > uvicorn default (None)
-        cfg_host = Config.get("fastapi.host", "127.0.0.1")
-        cfg_port = Config.get("fastapi.port", 8000)
         cfg_reload = Config.get("fastapi.reload", True)
         cfg_reload_dirs = Config.get("fastapi.reload_dirs") or None
         cfg_reload_excludes = Config.get("fastapi.reload_excludes") or None
 
-        host = self.option("host") or cfg_host
-        port = int(self.option("port") or cfg_port)
+        # 1. Start from hardcoded defaults
+        host: str = "127.0.0.1"
+        port: int = 8000
+
+        # 2. Override with APP_URL (lowest env-level source)
+        app_url: str | None = Config.get("fastapi.app_url")
+        if app_url:
+            normalized = app_url if "://" in app_url else f"http://{app_url}"
+            uri = Uri.of(normalized)
+            if uri.host():
+                host = uri.host()
+            if uri.port() is not None:
+                port = uri.port()
+
+        # 3. Override with APP_HOST / APP_PORT (higher than APP_URL)
+        cfg_host: str | None = Config.get("fastapi.host")
+        cfg_port: int | None = Config.get("fastapi.port")
+        if cfg_host:
+            host = cfg_host
+        if cfg_port is not None:
+            port = int(cfg_port)
+
+        # 4. Override with CLI flags (highest priority)
+        cli_host: str | None = self.option("host")
+        cli_port: str | None = self.option("port")
+        if cli_host:
+            host = cli_host
+        if cli_port:
+            port = int(cli_port)
+
         reload = cfg_reload if self.option("reload") is None else self.option("reload")
         app = self.option("app")
 
diff --git a/fastapi_startkit/src/fastapi_startkit/fastapi/config/fastapi.py b/fastapi_startkit/src/fastapi_startkit/fastapi/config/fastapi.py
index f85534c4..4f699dad 100644
--- a/fastapi_startkit/src/fastapi_startkit/fastapi/config/fastapi.py
+++ b/fastapi_startkit/src/fastapi_startkit/fastapi/config/fastapi.py
@@ -7,12 +7,14 @@
 class FastAPIConfig:
     """Server configuration for the uvicorn/FastAPI serve command.
 
-    All fields can be overridden via environment variables or by publishing a
-    ``config/fastapi.py`` file in the application root.
+    All fields are raw environment values — no parsing or defaults applied here.
+    Resolution logic (APP_HOST / APP_PORT → APP_URL → 127.0.0.1 / 8000)
+    lives in ServeCommand.
     """
 
-    host: str = dataclasses.field(default_factory=lambda: env("APP_HOST", "127.0.0.1"))
-    port: int = dataclasses.field(default_factory=lambda: env("APP_PORT", 8000))
+    host: str | None = dataclasses.field(default_factory=lambda: env("APP_HOST"))
+    port: int | None = dataclasses.field(default_factory=lambda: env("APP_PORT"))
+    app_url: str | None = dataclasses.field(default_factory=lambda: env("APP_URL"))
     reload: bool = dataclasses.field(default_factory=lambda: env("APP_RELOAD", True))
     reload_dirs: list | None = None
     reload_excludes: list = dataclasses.field(
diff --git a/fastapi_startkit/tests/fastapi/test_fastapi_config.py b/fastapi_startkit/tests/fastapi/test_fastapi_config.py
new file mode 100644
index 00000000..5d38afbd
--- /dev/null
+++ b/fastapi_startkit/tests/fastapi/test_fastapi_config.py
@@ -0,0 +1,52 @@
+"""Tests for FastAPIConfig raw values."""
+
+from fastapi_startkit.fastapi.config.fastapi import FastAPIConfig
+
+
+class TestFastAPIConfigDefaults:
+    """FastAPIConfig stores raw env values — no defaults or resolution here."""
+
+    def test_host_is_falsy_without_env(self, monkeypatch):
+        monkeypatch.delenv("APP_HOST", raising=False)
+        assert not FastAPIConfig().host
+
+    def test_port_is_falsy_without_env(self, monkeypatch):
+        monkeypatch.delenv("APP_PORT", raising=False)
+        assert not FastAPIConfig().port
+
+    def test_app_url_is_falsy_without_env(self, monkeypatch):
+        monkeypatch.delenv("APP_URL", raising=False)
+        assert not FastAPIConfig().app_url
+
+    def test_default_reload_is_true(self, monkeypatch):
+        monkeypatch.delenv("APP_RELOAD", raising=False)
+        assert FastAPIConfig().reload is True
+
+    def test_default_reload_dirs_is_none(self):
+        assert FastAPIConfig().reload_dirs is None
+
+    def test_default_reload_excludes(self):
+        excludes = FastAPIConfig().reload_excludes
+        assert "*.log" in excludes
+        assert "tests/*" in excludes
+        assert "node_modules/*" in excludes
+
+
+class TestFastAPIConfigEnvVars:
+    """FastAPIConfig reads raw env values without defaults."""
+
+    def test_app_host(self, monkeypatch):
+        monkeypatch.setenv("APP_HOST", "0.0.0.0")
+        assert FastAPIConfig().host == "0.0.0.0"
+
+    def test_app_port(self, monkeypatch):
+        monkeypatch.setenv("APP_PORT", "9000")
+        assert FastAPIConfig().port == 9000
+
+    def test_app_url(self, monkeypatch):
+        monkeypatch.setenv("APP_URL", "http://myapp.com:9000")
+        assert FastAPIConfig().app_url == "http://myapp.com:9000"
+
+    def test_app_reload_false(self, monkeypatch):
+        monkeypatch.setenv("APP_RELOAD", "False")
+        assert FastAPIConfig().reload is False