diff --git a/cmd/ydropbox/main.go b/cmd/ydropbox/main.go
index c2d3881..ea1f973 100644
--- a/cmd/ydropbox/main.go
+++ b/cmd/ydropbox/main.go
@@ -1,7 +1,38 @@
 package main
 
-import "log"
+import (
+	"flag"
+	"log"
+	"os"
+	"path/filepath"
+	"yoresee_dropbox/internal/app"
+)
 
 func main() {
-	log.Println("yDropbox starting...")
+	addr := flag.String("addr", "127.0.0.1:8999", "Listen address")
+	workspace := flag.String("workspace", "./workspace", "Workspace directory")
+	token := flag.String("token", "", "Access token")
+	flag.Parse()
+
+	if *token == "" {
+		*token = os.Getenv("YDROPBOX_TOKEN")
+	}
+	if *token == "" {
+		log.Fatal("Token required: --token or YDROPBOX_TOKEN env")
+	}
+
+	absWorkspace, _ := filepath.Abs(*workspace)
+	os.MkdirAll(filepath.Join(absWorkspace, "inbox"), 0755)
+	os.MkdirAll(filepath.Join(absWorkspace, "outbox"), 0755)
+	os.MkdirAll(filepath.Join(absWorkspace, ".ydropbox"), 0755)
+
+	cfg := app.Config{
+		Addr:      *addr,
+		Workspace: absWorkspace,
+		Token:     *token,
+	}
+
+	if err := app.Run(cfg); err != nil {
+		log.Fatal(err)
+	}
 }
diff --git a/internal/app/app.go b/internal/app/app.go
index 4879f7a..8043f11 100644
--- a/internal/app/app.go
+++ b/internal/app/app.go
@@ -1 +1,42 @@
 package app
+
+import (
+	"log"
+	"net/http"
+	"path/filepath"
+	"time"
+	"yoresee_dropbox/internal/scanner"
+	"yoresee_dropbox/internal/server"
+	"yoresee_dropbox/internal/store"
+)
+
+type Config struct {
+	Addr      string
+	Workspace string
+	Token     string
+}
+
+func NewHandler(cfg Config) (http.Handler, *store.Store, error) {
+	dbPath := filepath.Join(cfg.Workspace, ".ydropbox", "db.sqlite")
+	s, err := store.Open(dbPath)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	sc := scanner.New(s, cfg.Workspace, 10*time.Second)
+	sc.Start()
+
+	srv := server.New(s, cfg.Token, cfg.Workspace)
+	return srv.Handler(), s, nil
+}
+
+func Run(cfg Config) error {
+	handler, s, err := NewHandler(cfg)
+	if err != nil {
+		return err
+	}
+	defer s.Close()
+
+	log.Printf("Listening on %s", cfg.Addr)
+	return http.ListenAndServe(cfg.Addr, handler)
+}