diff --git a/backend/models/objects.go b/backend/models/objects.go
new file mode 100644
index 0000000..74e8513
--- /dev/null
+++ b/backend/models/objects.go
@@ -0,0 +1,59 @@
+package models
+
+import "time"
+
+type User struct {
+	Name    string `json:"name"`
+	IsAdmin bool   `json:"is_admin"`
+}
+
+type MIME struct {
+	Name      string `json:"name"`
+	Extension string `json:"extension"`
+}
+
+type Category struct {
+	ID        string    `json:"id"`
+	Name      string    `json:"name"`
+	Color     string    `json:"color"`
+	CreatedAt time.Time `json:"created_at"`
+	Creator   User      `json:"creator"`
+}
+
+type File struct {
+	ID        string    `json:"id"`
+	Name      string    `json:"name"`
+	MIME      MIME      `json:"mime"`
+	CreatedAt time.Time `json:"created_at"`
+	Creator   User      `json:"creator"`
+}
+
+type Tag struct {
+	ID        string    `json:"id"`
+	Name      string    `json:"name"`
+	Color     string    `json:"color"`
+	Category  Category  `json:"category"`
+	CreatedAt time.Time `json:"created_at"`
+	Creator   User      `json:"creator"`
+}
+
+type Autotag struct {
+	TriggerTag Tag  `json:"trigger_tag"`
+	AddTag     Tag  `json:"add_tag"`
+	IsActive   bool `json:"is_active"`
+}
+
+type Pool struct {
+	ID        string    `json:"id"`
+	Name      string    `json:"name"`
+	CreatedAt time.Time `json:"created_at"`
+	Creator   User      `json:"creator"`
+}
+
+type Session struct {
+	ID           int       `json:"id"`
+	UserAgent    string    `json:"user_agent"`
+	StartedAt    time.Time `json:"started_at"`
+	ExpiresAt    time.Time `json:"expires_at"`
+	LastActivity time.Time `json:"last_activity"`
+}