diff --git a/adapter/adapter.go b/adapter/adapter.go
index 6de7fb92..411069fb 100644
--- a/adapter/adapter.go
+++ b/adapter/adapter.go
@@ -165,6 +165,8 @@ func (p *Proxy) MarshalJSON() ([]byte, error) {
 	mapping["udp"] = p.SupportUDP()
 	mapping["xudp"] = p.SupportXUDP()
 	mapping["tfo"] = p.SupportTFO()
+	mapping["mptcp"] = p.SupportMPTCP()
+	mapping["smux"] = p.SupportSMUX()
 	return json.Marshal(mapping)
 }
 
diff --git a/adapter/outbound/base.go b/adapter/outbound/base.go
index ae8c4651..93e8d979 100644
--- a/adapter/outbound/base.go
+++ b/adapter/outbound/base.go
@@ -95,6 +95,16 @@ func (b *Base) SupportTFO() bool {
 	return b.tfo
 }
 
+// SupportMPTCP implements C.ProxyAdapter
+func (b *Base) SupportMPTCP() bool {
+	return b.mpTcp
+}
+
+// SupportSMUX implements C.ProxyAdapter
+func (b *Base) SupportSMUX() bool {
+	return false
+}
+
 // IsL3Protocol implements C.ProxyAdapter
 func (b *Base) IsL3Protocol(metadata *C.Metadata) bool {
 	return false
diff --git a/adapter/outbound/singmux.go b/adapter/outbound/singmux.go
index 67267744..5cc4e748 100644
--- a/adapter/outbound/singmux.go
+++ b/adapter/outbound/singmux.go
@@ -97,6 +97,10 @@ func (s *SingMux) SupportUOT() bool {
 	return true
 }
 
+func (s *SingMux) SupportSMUX() bool {
+	return true
+}
+
 func closeSingMux(s *SingMux) {
 	_ = s.client.Close()
 }
diff --git a/adapter/outbound/wireguard.go b/adapter/outbound/wireguard.go
index 03145c37..ca732baa 100644
--- a/adapter/outbound/wireguard.go
+++ b/adapter/outbound/wireguard.go
@@ -625,6 +625,20 @@ func (r *refProxyAdapter) SupportTFO() bool {
 	return false
 }
 
+func (r *refProxyAdapter) SupportMPTCP() bool {
+	if r.proxyAdapter != nil {
+		return r.proxyAdapter.SupportMPTCP()
+	}
+	return false
+}
+
+func (r *refProxyAdapter) SupportSMUX() bool {
+	if r.proxyAdapter != nil {
+		return r.proxyAdapter.SupportSMUX()
+	}
+	return false
+}
+
 func (r *refProxyAdapter) MarshalJSON() ([]byte, error) {
 	if r.proxyAdapter != nil {
 		return r.proxyAdapter.MarshalJSON()
diff --git a/constant/adapters.go b/constant/adapters.go
index c7b73a06..2bbcffba 100644
--- a/constant/adapters.go
+++ b/constant/adapters.go
@@ -106,6 +106,8 @@ type ProxyAdapter interface {
 	SupportUDP() bool
 	SupportXUDP() bool
 	SupportTFO() bool
+	SupportMPTCP() bool
+	SupportSMUX() bool
 	MarshalJSON() ([]byte, error)
 
 	// Deprecated: use DialContextWithDialer and ListenPacketWithDialer instead.