diff --git a/cmd/cmd.go b/cmd/cmd.go
index c7c5b4e..3713103 100644
--- a/cmd/cmd.go
+++ b/cmd/cmd.go
@@ -15,6 +15,7 @@ import (
 	"github.com/itnpeople/cbctl/app"
 	"github.com/itnpeople/cbctl/cmd/mcks"
 	"github.com/itnpeople/cbctl/cmd/spider"
+	"github.com/itnpeople/cbctl/cmd/tumblebug"
 )
 
 const (
@@ -105,6 +106,7 @@ func NewCBCtlCommand(o CBCtlOptions) *cobra.Command {
 	cmds.AddCommand(spider.NewCmdCredential(output))
 	cmds.AddCommand(spider.NewCmdRegion(output))
 	cmds.AddCommand(spider.NewCmdConnection(output))
+	cmds.AddCommand(tumblebug.NewCmdMCIS(output))
 	cmds.AddCommand(NewCmdPlugin(o.IOStreams))
 
 	cobra.OnInitialize(func() {
diff --git a/cmd/tumblebug/mcis.go b/cmd/tumblebug/mcis.go
new file mode 100644
index 0000000..eac926e
--- /dev/null
+++ b/cmd/tumblebug/mcis.go
@@ -0,0 +1,183 @@
+package tumblebug
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/go-resty/resty/v2"
+	"github.com/spf13/cobra"
+
+	"github.com/itnpeople/cbctl/app"
+	"github.com/itnpeople/cbctl/utils"
+)
+
+// a struct to support command
+type ConnectionOptions struct {
+	app.Output
+	RootUrl   string
+	Namespace string
+	Name      string
+	HTTP      *resty.Request
+}
+
+// returns initialized Options
+func NewConnectionOptions(output app.Output) *ConnectionOptions {
+	return &ConnectionOptions{
+		Output: output,
+	}
+}
+
+// completes all the required options
+func (o *ConnectionOptions) Complete(cmd *cobra.Command) error {
+	o.RootUrl = utils.NVL(o.RootUrl, app.Config.GetCurrentContext().Urls.Tumblebug)
+	if !strings.HasPrefix(o.RootUrl, "http://") && !strings.HasPrefix(o.RootUrl, "https://") {
+		return fmt.Errorf("Invalid Tumblebug ROOT URL (%s)", o.RootUrl)
+	}
+	o.Namespace = utils.NVL(o.Namespace, app.Config.GetCurrentContext().Namespace)
+	if o.Namespace == "" {
+		return fmt.Errorf("Invalid namespace")
+	}
+	o.HTTP = resty.New().SetDisableWarn(true).R().SetBasicAuth("default", "default")
+	return nil
+}
+
+// validates the provided options
+func (o *ConnectionOptions) Validate(args []string) error {
+	if len(args) > 0 {
+		o.Name = utils.NVL(o.Name, args[0])
+	}
+	if o.Name == "" {
+		return fmt.Errorf("Invalid name")
+	}
+	return nil
+}
+
+// returns a cobra command
+func NewCmdMCIS(output app.Output) *cobra.Command {
+	o := NewConnectionOptions(output)
+	cmds := &cobra.Command{
+		Use:   "mcis",
+		Short: "Cloud Infra.",
+		Run: func(c *cobra.Command, args []string) {
+			c.Help()
+		},
+	}
+	cmds.PersistentFlags().StringVar(&o.RootUrl, "url", "", "Tumblebug ROOT URL (http://localhost:1323/tumblebug)")
+	cmds.PersistentFlags().StringVarP(&o.Namespace, "namespace", "n", "", "cloud-barista namespace for cluster list")
+	cmds.PersistentFlags().StringVar(&o.Name, "name", "", "name of MCIS")
+
+	// list
+	cmds.AddCommand(&cobra.Command{
+		Use:   "list",
+		Short: "Get MCISs.",
+		Run: func(c *cobra.Command, args []string) {
+			app.ValidateError(o.Complete(c))
+			app.ValidateError(func() error {
+				if resp, err := o.HTTP.Get(fmt.Sprintf("%s/ns/%s/mcis", o.RootUrl, o.Namespace)); err != nil {
+					return err
+				} else {
+					o.Output.Write(resp.Body())
+				}
+				return nil
+			}())
+		},
+	})
+
+	// get
+	cmds.AddCommand(&cobra.Command{
+		Use:   "get",
+		Short: "Get a MCISs.",
+		Run: func(c *cobra.Command, args []string) {
+			app.ValidateError(o.Complete(c))
+			app.ValidateError(o.Validate(args))
+			app.ValidateError(func() error {
+				if resp, err := o.HTTP.Get(fmt.Sprintf("%s/ns/%s/mcis/%s", o.RootUrl, o.Namespace, o.Name)); err != nil {
+					return err
+				} else {
+					o.Output.Write(resp.Body())
+				}
+				return nil
+			}())
+		},
+	})
+
+	// delete
+	cmds.AddCommand(&cobra.Command{
+		Use:   "delete",
+		Short: "Delete a MCISs.",
+		Run: func(c *cobra.Command, args []string) {
+			app.ValidateError(o.Complete(c))
+			app.ValidateError(o.Validate(args))
+			app.ValidateError(func() error {
+				if resp, err := o.HTTP.Delete(fmt.Sprintf("%s/ns/%s/mcis/%s?action=terminate", o.RootUrl, o.Namespace, o.Name)); err != nil {
+					return err
+				} else {
+					o.Output.Write(resp.Body())
+				}
+				if resp, err := o.HTTP.Delete(fmt.Sprintf("%s/ns/%s/mcis/%s?action=refine", o.RootUrl, o.Namespace, o.Name)); err != nil {
+					return err
+				} else {
+					o.Output.Write(resp.Body())
+				}
+
+				if resp, err := o.HTTP.Delete(fmt.Sprintf("%s/ns/%s/mcis/%s", o.RootUrl, o.Namespace, o.Name)); err != nil {
+					return err
+				} else {
+					o.Output.Write(resp.Body())
+				}
+				return nil
+			}())
+		},
+	})
+
+	// delete
+	cmds.AddCommand(&cobra.Command{
+		Use:   "clean",
+		Short: "clean-up MCISs.",
+		Run: func(c *cobra.Command, args []string) {
+			app.ValidateError(o.Complete(c))
+			app.ValidateError(func() error {
+
+				// mcis
+				if resp, err := o.HTTP.Delete(fmt.Sprintf("%s/ns/%s/mcis", o.RootUrl, o.Namespace)); err != nil {
+					return err
+				} else {
+					o.Output.Write(resp.Body())
+				}
+				// vpc
+				if resp, err := o.HTTP.Delete(fmt.Sprintf("%s/ns/%s/resources/vNet", o.RootUrl, o.Namespace)); err != nil {
+					return err
+				} else {
+					o.Output.Write(resp.Body())
+				}
+				// securityGroup
+				if resp, err := o.HTTP.Delete(fmt.Sprintf("%s/ns/%s/resources/securityGroup", o.RootUrl, o.Namespace)); err != nil {
+					return err
+				} else {
+					o.Output.Write(resp.Body())
+				}
+				// sshKey
+				if resp, err := o.HTTP.Delete(fmt.Sprintf("%s/ns/%s/resources/sshKey", o.RootUrl, o.Namespace)); err != nil {
+					return err
+				} else {
+					o.Output.Write(resp.Body())
+				}
+				// image
+				if resp, err := o.HTTP.Delete(fmt.Sprintf("%s/ns/%s/resources/image", o.RootUrl, o.Namespace)); err != nil {
+					return err
+				} else {
+					o.Output.Write(resp.Body())
+				}
+				// spec
+				if resp, err := o.HTTP.Delete(fmt.Sprintf("%s/ns/%s/resources/spec", o.RootUrl, o.Namespace)); err != nil {
+					return err
+				} else {
+					o.Output.Write(resp.Body())
+				}
+				return nil
+			}())
+		},
+	})
+
+	return cmds
+}