diff --git a/lib/lib.go b/lib/lib.go
index b92c297..5c911b3 100644
--- a/lib/lib.go
+++ b/lib/lib.go
@@ -53,6 +53,17 @@ type Context interface {
 
 // message, address
 
+type MsgHead interface {
+	Action() string
+}
+
+type Message interface {
+	MsgHead
+	Head() MsgHead
+	Sender() Address
+	Payload() Payload
+}
+
 type Address interface {
 	fmt.Stringer
 	Url() string
@@ -62,9 +73,9 @@ type Address interface {
 	SetInteraction(string, string)
 }
 
-type Message interface {
-	Action() string
-	Sender() Address
+type Payload interface {
+	fmt.Stringer
+	//Data() interface{}
 }
 
 // action
diff --git a/lib/message/address.go b/lib/message/address.go
index dbb71ae..a44507e 100644
--- a/lib/message/address.go
+++ b/lib/message/address.go
@@ -3,6 +3,8 @@ package message
 import (
 	"fmt"
 	"strings"
+
+	"git.sr.ht/~cco/go-scopes/lib"
 )
 
 // Address implementation
@@ -36,13 +38,13 @@ func (addr *address) SetInteraction(sid, iid string) {
 	addr.iid = iid
 }
 
-func SimpleAddress(srv string) *address {
+func SimpleAddress(srv string) lib.Address {
 	return &address{
 		srv: srv,
 	}
 }
 
-func ParseAddress(s string) *address {
+func ParseAddress(s string) lib.Address {
 	addr := address{}
 	p := strings.SplitN(s, "#", 2)
 	if len(p) > 1 {
diff --git a/lib/message/message.go b/lib/message/message.go
index 7a623cb..accf767 100644
--- a/lib/message/message.go
+++ b/lib/message/message.go
@@ -8,6 +8,10 @@ import (
 
 type strMessage string
 
+func (msg strMessage) Head() lib.MsgHead {
+	return msg
+}
+
 func (msg strMessage) Action() string {
 	return string(msg)
 }
@@ -16,7 +20,11 @@ func (msg strMessage) Sender() lib.Address {
 	return nil
 }
 
-func StrMessage(action string) strMessage {
+func (msg strMessage) Payload() lib.Payload {
+	return nil
+}
+
+func StrMessage(action string) lib.Message {
 	return strMessage(action)
 }
 
diff --git a/server/server.go b/server/server.go
index 8e02ad9..0caca3e 100644
--- a/server/server.go
+++ b/server/server.go
@@ -19,7 +19,7 @@ type ServerState struct {
 }
 
 func Start(ctx lib.Context) {
-	gin.SetMode(gin.ReleaseMode)
+	//gin.SetMode(gin.ReleaseMode)
 	lib.GetCfg[*Cfg](ctx).BaseCfg.WithDoneHandler(HandleDone)
 	Serve(ctx)
 	lib.RunCtx(ctx, core.Listen)
@@ -33,6 +33,7 @@ func HandleDone(ctx lib.Context) bool {
 func Serve(ctx lib.Context) {
 	//r := gin.Default()
 	r := gin.New()
+	r.Use(gin.Recovery())
 	r.Use(Logger(ctx))
 	r.GET("/*action", func(c *gin.Context) {
 		c.String(http.StatusOK, "Hello World")
diff --git a/tests/unit_test.go b/tests/unit_test.go
index 79da687..6fe874a 100644
--- a/tests/unit_test.go
+++ b/tests/unit_test.go
@@ -12,6 +12,7 @@ import (
 func TestUnit(tb *tbase.T) {
 	t := testing.SetUp(tb)
 	t.Run("address", AddressTest)
+	t.Run("strmsg", StrMessageTest)
 }
 
 func AddressTest(t *testing.T) {
@@ -33,3 +34,10 @@ func AddressTest(t *testing.T) {
 	ad1.SetInteraction("1abc", "2cde")
 	t.AssertEqual(fmt.Sprint(ad1), "https://scopes.cy7.eu#worker/1abc/2cde")
 }
+
+func StrMessageTest(t *testing.T) {
+	t.AssertEqual(message.Quit.Action(), "quit")
+	var msg lib.Message = message.StrMessage("doit")
+	t.AssertEqual(msg.Action(), "doit")
+	t.AssertEqual(msg.Head().Action(), "doit")
+}