diff --git a/nip05/nip05.go b/nip05/nip05.go
index f2551e2..18bc00e 100644
--- a/nip05/nip05.go
+++ b/nip05/nip05.go
@@ -19,6 +19,10 @@ type WellKnownResponse struct {
 	NIP46  map[string][]string `json:"nip46,omitempty"`
 }
 
+func IsValidIdentifier(input string) bool {
+	return NIP05_REGEX.MatchString(input)
+}
+
 func ParseIdentifier(fullname string) (name string, domain string, err error) {
 	res := NIP05_REGEX.FindStringSubmatch(fullname)
 	if len(res) == 0 {