diff --git a/getcid/cmd/main.go b/getcid/cmd/main.go
new file mode 100644
index 0000000..a87c5a5
--- /dev/null
+++ b/getcid/cmd/main.go
@@ -0,0 +1,12 @@
+package main
+
+import (
+	"os"
+
+	"github.com/starlinglab/integrity-v2/getcid"
+	"github.com/starlinglab/integrity-v2/util"
+)
+
+func main() {
+	util.Fatal(getcid.Run(os.Args[1:]))
+}
diff --git a/getcid/getcid.go b/getcid/getcid.go
new file mode 100644
index 0000000..25cbbd4
--- /dev/null
+++ b/getcid/getcid.go
@@ -0,0 +1,25 @@
+package getcid
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/starlinglab/integrity-v2/util"
+)
+
+func Run(args []string) error {
+	if len(args) != 1 {
+		return fmt.Errorf("specify the path to one file")
+	}
+	f, err := os.Open(args[0])
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+	cid, err := util.CalculateFileCid(f)
+	if err != nil {
+		return err
+	}
+	fmt.Println(cid)
+	return nil
+}
diff --git a/main.go b/main.go
index d313794..47709c3 100644
--- a/main.go
+++ b/main.go
@@ -8,7 +8,9 @@ import (
 	"github.com/starlinglab/integrity-v2/attr"
 	"github.com/starlinglab/integrity-v2/dummy"
 	exportproof "github.com/starlinglab/integrity-v2/export-proof"
+	"github.com/starlinglab/integrity-v2/getcid"
 	injectc2pa "github.com/starlinglab/integrity-v2/inject-c2pa"
+	"github.com/starlinglab/integrity-v2/register"
 	"github.com/starlinglab/integrity-v2/upload"
 	"github.com/starlinglab/integrity-v2/util"
 	"github.com/starlinglab/integrity-v2/webhook"
@@ -33,6 +35,10 @@ func run(cmd string, args []string) (bool, error) {
 		err = webhook.Run(args)
 	case "upload":
 		err = upload.Run(args)
+	case "register":
+		err = register.Run(args)
+	case "getcid":
+		err = getcid.Run(args)
 	case "-h", "--help", "help":
 		fmt.Println(helpText)
 	default: