diff --git a/internal/api/merch/origins.go b/internal/api/merch/origins.go
new file mode 100644
index 0000000..e29f0dc
--- /dev/null
+++ b/internal/api/merch/origins.go
@@ -0,0 +1,27 @@
+package merch
+
+import "encoding/json"
+
+type Origin int
+
+const (
+	surugaya = (iota + 1) * 1000
+	mandarake
+)
+
+var Origins = [...]string{
+	"surugaya",
+	"mandarake",
+}
+
+func (o Origin) String() string {
+	index := (int(o) / 1000) - 1
+	if index < 0 || index >= len(Origins) {
+		return "unknown"
+	}
+	return Origins[index]
+}
+
+func (o Origin) MarshalJSON() ([]byte, error) {
+	return json.Marshal(o.String())
+}