diff --git a/caddy/directives.go b/caddy/directives.go
index 87f6233d..fd524508 100644
--- a/caddy/directives.go
+++ b/caddy/directives.go
@@ -69,6 +69,15 @@ var directiveOrder = []directive{
 	{"browse", setup.Browse},
 }
 
+// Directives returns the list of directives in order of priority.
+func Directives() []string {
+	directives := make([]string, len(directiveOrder))
+	for i, d := range directiveOrder {
+		directives[i] = d.name
+	}
+	return directives
+}
+
 // RegisterDirective adds the given directive to caddy's list of directives.
 // Pass the name of a directive you want it to be placed after,
 // otherwise it will be placed at the bottom of the stack.
diff --git a/main.go b/main.go
index b509b12f..abb1b3f3 100644
--- a/main.go
+++ b/main.go
@@ -36,6 +36,7 @@ func init() {
 	flag.StringVar(&revoke, "revoke", "", "Hostname for which to revoke the certificate")
 	flag.StringVar(&caddy.Root, "root", caddy.DefaultRoot, "Root path to default site")
 	flag.BoolVar(&version, "version", false, "Show version")
+	flag.BoolVar(&directives, "directives", false, "List supported directives")
 }
 
 func main() {
@@ -77,6 +78,12 @@ func main() {
 		}
 		os.Exit(0)
 	}
+	if directives {
+		for _, d := range caddy.Directives() {
+			fmt.Println(d)
+		}
+		os.Exit(0)
+	}
 
 	// Set CPU cap
 	err := setCPU(cpu)
@@ -212,11 +219,12 @@ const appName = "Caddy"
 
 // Flags that control program flow or startup
 var (
-	conf    string
-	cpu     string
-	logfile string
-	revoke  string
-	version bool
+	conf       string
+	cpu        string
+	logfile    string
+	revoke     string
+	version    bool
+	directives bool
 )
 
 // Build information obtained with the help of -ldflags