diff --git a/internal/api/client.go b/internal/api/client.go
index 0ec49f3..dd466d3 100644
--- a/internal/api/client.go
+++ b/internal/api/client.go
@@ -115,10 +115,11 @@ type Credential struct {
 
 // Variable represents an n8n variable
 type Variable struct {
-	ID    string `json:"id,omitempty"`
-	Key   string `json:"key"`
-	Value string `json:"value"`
-	Type  string `json:"type,omitempty"`
+	ID        string `json:"id,omitempty"`
+	Key       string `json:"key"`
+	Value     string `json:"value"`
+	Type      string `json:"type,omitempty"`
+	ProjectID string `json:"projectId,omitempty"`
 }
 
 // ListResult contains paginated list results
@@ -683,8 +684,8 @@ func (c *Client) TriggerWebhook(path, method string) ([]byte, error) {
 
 // --- Variables ---
 
-// ListVariables returns all variables
-func (c *Client) ListVariables(limit int, cursor string) ([]Variable, error) {
+// ListVariables returns all variables, optionally filtered by project.
+func (c *Client) ListVariables(limit int, cursor string, projectID string) ([]Variable, error) {
 	params := url.Values{}
 	if limit > 0 {
 		params.Set("limit", strconv.Itoa(limit))
@@ -692,6 +693,9 @@ func (c *Client) ListVariables(limit int, cursor string) ([]Variable, error) {
 	if cursor != "" {
 		params.Set("cursor", cursor)
 	}
+	if projectID != "" {
+		params.Set("projectId", projectID)
+	}
 
 	path := "/variables"
 	if len(params) > 0 {
@@ -713,9 +717,12 @@ func (c *Client) ListVariables(limit int, cursor string) ([]Variable, error) {
 	return resp.Data, nil
 }
 
-// CreateVariable creates a new variable
-func (c *Client) CreateVariable(key, value string) error {
+// CreateVariable creates a new variable, optionally scoped to a project.
+func (c *Client) CreateVariable(key, value, projectID string) error {
 	body := map[string]string{"key": key, "value": value}
+	if projectID != "" {
+		body["projectId"] = projectID
+	}
 	_, err := c.request(http.MethodPost, "/variables", body)
 	return err
 }
diff --git a/internal/cmd/variable/variable.go b/internal/cmd/variable/variable.go
index e4d26c9..7a76f4a 100644
--- a/internal/cmd/variable/variable.go
+++ b/internal/cmd/variable/variable.go
@@ -20,6 +20,8 @@ func NewVariableCmd() *cobra.Command {
 		Long:    `List, create, update, and delete n8n environment variables.`,
 	}
 
+	cmd.PersistentFlags().String("project", "", "Project ID (omit for global variables)")
+
 	cmd.AddCommand(newListCmd())
 	cmd.AddCommand(newGetCmd())
 	cmd.AddCommand(newCreateCmd())
@@ -53,7 +55,8 @@ func newListCmd() *cobra.Command {
 				return err
 			}
 
-			vars, err := client.ListVariables(0, "")
+			projectID, _ := cmd.Flags().GetString("project")
+			vars, err := client.ListVariables(0, "", projectID)
 			if err != nil {
 				return fmt.Errorf("failed to list variables: %w", err)
 			}
@@ -68,14 +71,34 @@ func newListCmd() *cobra.Command {
 				return nil
 			}
 
-			fmt.Printf("%-8s  %-40s  %s\n", "ID", "KEY", "VALUE")
-			fmt.Printf("%-8s  %-40s  %s\n", strings.Repeat("-", 8), strings.Repeat("-", 40), strings.Repeat("-", 50))
+			hasProject := false
+			for _, v := range vars {
+				if v.ProjectID != "" {
+					hasProject = true
+					break
+				}
+			}
+
+			if hasProject {
+				fmt.Printf("%-8s  %-18s  %-40s  %s\n", "ID", "PROJECT", "KEY", "VALUE")
+				fmt.Printf("%-8s  %-18s  %-40s  %s\n",
+					strings.Repeat("-", 8), strings.Repeat("-", 18),
+					strings.Repeat("-", 40), strings.Repeat("-", 50))
+			} else {
+				fmt.Printf("%-8s  %-40s  %s\n", "ID", "KEY", "VALUE")
+				fmt.Printf("%-8s  %-40s  %s\n", strings.Repeat("-", 8), strings.Repeat("-", 40), strings.Repeat("-", 50))
+			}
+
 			for _, v := range vars {
 				value := v.Value
 				if len(value) > 50 {
 					value = value[:47] + "..."
 				}
-				fmt.Printf("%-8s  %-40s  %s\n", v.ID, v.Key, value)
+				if hasProject {
+					fmt.Printf("%-8s  %-18s  %-40s  %s\n", v.ID, v.ProjectID, v.Key, value)
+				} else {
+					fmt.Printf("%-8s  %-40s  %s\n", v.ID, v.Key, value)
+				}
 			}
 
 			return nil
@@ -96,7 +119,8 @@ func newGetCmd() *cobra.Command {
 				return err
 			}
 
-			vars, err := client.ListVariables(0, "")
+			projectID, _ := cmd.Flags().GetString("project")
+			vars, err := client.ListVariables(0, "", projectID)
 			if err != nil {
 				return fmt.Errorf("failed to list variables: %w", err)
 			}
@@ -147,7 +171,8 @@ special shell characters (e.g. n8nctl var create key --value 'b!xyz').`,
 				return fmt.Errorf("value is required: pass as second argument or use --value")
 			}
 
-			if err := client.CreateVariable(key, value); err != nil {
+			projectID, _ := cmd.Flags().GetString("project")
+			if err := client.CreateVariable(key, value, projectID); err != nil {
 				return fmt.Errorf("failed to create variable: %w", err)
 			}
 
@@ -188,8 +213,9 @@ special shell characters (e.g. n8nctl var update key --value 'b!xyz').`,
 				return fmt.Errorf("value is required: pass as second argument or use --value")
 			}
 
-			// Resolve key to ID
-			vars, err := client.ListVariables(0, "")
+			// Resolve key to ID within the given project scope.
+			projectID, _ := cmd.Flags().GetString("project")
+			vars, err := client.ListVariables(0, "", projectID)
 			if err != nil {
 				return fmt.Errorf("failed to list variables: %w", err)
 			}
@@ -224,8 +250,9 @@ func newDeleteCmd() *cobra.Command {
 				return err
 			}
 
-			// Resolve key to ID
-			vars, err := client.ListVariables(0, "")
+			// Resolve key to ID within the given project scope.
+			projectID, _ := cmd.Flags().GetString("project")
+			vars, err := client.ListVariables(0, "", projectID)
 			if err != nil {
 				return fmt.Errorf("failed to list variables: %w", err)
 			}