diff --git a/cmd/server/v1.go b/cmd/server/v1.go
index af9b72c..5ff35ea 100644
--- a/cmd/server/v1.go
+++ b/cmd/server/v1.go
@@ -3,6 +3,7 @@ package main
 import (
 	"fmt"
 	"net/http"
+	"path"
 	"strings"
 )
 
@@ -11,5 +12,15 @@ func isV1(r *http.Request) bool {
 }
 
 func (s *S) serveV1(w http.ResponseWriter, r *http.Request) error {
-	return fmt.Errorf("not impl: v1")
+	switch path.Join(r.Method, r.URL.Path) {
+	case "PUT/v1/state/" + s.Session(r).ID + "/party":
+		return s.serveV1PutParty(w, r)
+	default:
+		http.NotFound(w, r)
+	}
+	return nil
+}
+
+func (s *S) serveV1PutParty(w http.ResponseWriter, r *http.Request) error {
+	return fmt.Errorf("not impl")
 }