diff --git a/main.go b/main.go
index 8ffb79c..99f9c85 100644
--- a/main.go
+++ b/main.go
@@ -32,9 +32,10 @@ type ErrorResponse struct {
 }
 
 type ExternalSpecResponse struct {
-	Success       bool   `json:"success"`
-	Agent         string `json:"agent"`
-	Specification string `json:"specification"`
+	Success       bool     `json:"success"`
+	Agent         string   `json:"agent"`
+	Specification string   `json:"specification"`
+	Commands      []string `json:"commands"`
 }
 
 type ExternalPublicKeyResponse struct {
@@ -107,6 +108,10 @@ func buildExternalSpecCommand() *cli.Command {
 				Success:       true,
 				Agent:         "external-signer-pkc11/0.1.0",
 				Specification: "External/1.0.0-alpha",
+				Commands: []string{
+					"external_public_key",
+					"external_sign",
+				},
 			}
 			printResponseSlient(externalSpecResponse)
 			return nil