diff --git a/v2alpha/cmd/goupnp2srvgen/main.go b/v2alpha/cmd/goupnp2srvgen/main.go
index 08aefe9..7ed7b65 100644
--- a/v2alpha/cmd/goupnp2srvgen/main.go
+++ b/v2alpha/cmd/goupnp2srvgen/main.go
@@ -81,7 +81,7 @@ func run() error {
 	// as well as necessary for extended types.
 	typeMap := types.TypeMap().Clone()
 	typeMap[soapActionInterface] = typedesc.TypeDesc{
-		GoType: reflect.TypeOf((*soap.SOAPAction)(nil)).Elem(),
+		GoType: reflect.TypeOf((*soap.Action)(nil)).Elem(),
 	}
 
 	for _, m := range manifests.DCPS {
diff --git a/v2alpha/soap/client/client.go b/v2alpha/soap/client/client.go
index a0958e0..c608188 100644
--- a/v2alpha/soap/client/client.go
+++ b/v2alpha/soap/client/client.go
@@ -9,6 +9,7 @@ import (
 	"io"
 	"net/http"
 
+	"github.com/huin/goupnp/v2alpha/soap"
 	"github.com/huin/goupnp/v2alpha/soap/envelope"
 )
 
@@ -85,19 +86,17 @@ func (c *Client) Do(
 	return ParseResponseAction(resp, actionOut)
 }
 
-// PerformAction makes a SOAP request, with the given `argsIn` as input
-// arguments, and `argsOut` to capture the output arguments into.
-// `serviceType` is the SOAP service type URN, `actionName` is the action to
-// call.
+// PerformAction makes a SOAP request, with the given action.
 //
-// This is a convenience for calling `Client.Do` without creating `*Action` values.
+// This is a convenience for calling `Client.Do` without creating
+// `*envelope.Action` values.
 func PerformAction(
 	ctx context.Context, c *Client,
-	serviceType, actionName string,
-	argsIn, argsOut any,
+	action soap.Action,
 ) error {
-	actionIn := envelope.NewSendAction(serviceType, actionName, argsIn)
-	actionOut := &envelope.Action{Args: argsOut}
+	actionIn := envelope.NewSendAction(
+		action.ServiceType(), action.ActionName(), action.RefRequest())
+	actionOut := &envelope.Action{Args: action.RefResponse()}
 	return c.Do(ctx, actionIn, actionOut)
 }
 
diff --git a/v2alpha/soap/client/client_test.go b/v2alpha/soap/client/client_test.go
index e749c27..29bde61 100644
--- a/v2alpha/soap/client/client_test.go
+++ b/v2alpha/soap/client/client_test.go
@@ -8,9 +8,25 @@ import (
 	"testing"
 	"time"
 
+	"github.com/huin/goupnp/v2alpha/soap"
 	"github.com/huin/goupnp/v2alpha/soap/envelope"
 )
 
+const serviceType = "fake:service:type"
+const actionName = "ActionName"
+
+type Action struct {
+	req  ActionArgs
+	resp ActionReply
+}
+
+var _ soap.Action = &Action{}
+
+func (a *Action) ServiceType() string { return serviceType }
+func (a *Action) ActionName() string  { return actionName }
+func (a *Action) RefRequest() any     { return &a.req }
+func (a *Action) RefResponse() any    { return &a.resp }
+
 type ActionArgs struct {
 	Name string
 }
@@ -81,7 +97,7 @@ func TestPerformAction(t *testing.T) {
 
 	service := &fakeSoapServer{
 		responses: map[actionKey]*envelope.Action{
-			{"/endpointpath", "\"http://example.com/endpointns#Foo\""}: {
+			{"/endpointpath", fmt.Sprintf("\"%s#%s\"", serviceType, actionName)}: {
 				Args: &ActionReply{Greeting: "Hello, World!"},
 			},
 		},
@@ -91,13 +107,14 @@ func TestPerformAction(t *testing.T) {
 
 	c := New(ts.URL + "/endpointpath")
 
-	reply := &ActionReply{}
+	a := &Action{
+		req: ActionArgs{Name: "World"},
+	}
 
-	if err := PerformAction(ctx, c, "http://example.com/endpointns", "Foo",
-		&ActionArgs{Name: "World"}, reply); err != nil {
+	if err := PerformAction(ctx, c, a); err != nil {
 		t.Errorf("got error: %v, want success", err)
 	} else {
-		if got, want := reply.Greeting, "Hello, World!"; got != want {
+		if got, want := a.resp.Greeting, "Hello, World!"; got != want {
 			t.Errorf("got %q, want %q", got, want)
 		}
 	}
diff --git a/v2alpha/soap/soap.go b/v2alpha/soap/soap.go
index b7f2311..4204f8a 100644
--- a/v2alpha/soap/soap.go
+++ b/v2alpha/soap/soap.go
@@ -1,9 +1,9 @@
 // Package soap defines basic types used by SOAP packages.
 package soap
 
-// SOAPAction defines the interface for the convenience self-describing action request/response
+// Action defines the interface for the convenience self-describing action request/response
 // struct types.
-type SOAPAction interface {
+type Action interface {
 	// ServiceType returns Service type, e.g. "urn:schemas-upnp-org:service:Foo:1".
 	ServiceType() string
 	// ActionName returns Action name, e.g. "SetBar".