diff --git a/dnsapi/dns_regru.sh b/dnsapi/dns_regru.sh
new file mode 100644
index 00000000..cd93189f
--- /dev/null
+++ b/dnsapi/dns_regru.sh
@@ -0,0 +1,205 @@
+#!/usr/bin/env sh
+
+#
+#CF_Key="sdfsdfsdfljlbjkljlkjsdfoiwje"
+#
+#CF_Email="xxxx@sss.com"
+
+CF_Api="https://api.cloudflare.com/client/v4"
+
+########  Public functions #####################
+
+#Usage: add  _acme-challenge.www.domain.com   "XKrxpRBosdIKFzxW_CT3KLZNf6q0HG9i01zxXp5CPBs"
+dns_cf_add() {
+  fulldomain=$1
+  txtvalue=$2
+
+  CF_Key="${CF_Key:-$(_readaccountconf_mutable CF_Key)}"
+  CF_Email="${CF_Email:-$(_readaccountconf_mutable CF_Email)}"
+  if [ -z "$CF_Key" ] || [ -z "$CF_Email" ]; then
+    CF_Key=""
+    CF_Email=""
+    _err "You didn't specify a Cloudflare api key and email yet."
+    _err "You can get yours from here https://dash.cloudflare.com/profile."
+    return 1
+  fi
+
+  if ! _contains "$CF_Email" "@"; then
+    _err "It seems that the CF_Email=$CF_Email is not a valid email address."
+    _err "Please check and retry."
+    return 1
+  fi
+
+  #save the api key and email to the account conf file.
+  _saveaccountconf_mutable CF_Key "$CF_Key"
+  _saveaccountconf_mutable CF_Email "$CF_Email"
+
+  _debug "First detect the root zone"
+  if ! _get_root "$fulldomain"; then
+    _err "invalid domain"
+    return 1
+  fi
+  _debug _domain_id "$_domain_id"
+  _debug _sub_domain "$_sub_domain"
+  _debug _domain "$_domain"
+
+  _debug "Getting txt records"
+  _cf_rest GET "zones/${_domain_id}/dns_records?type=TXT&name=$fulldomain"
+
+  if ! printf "%s" "$response" | grep \"success\":true >/dev/null; then
+    _err "Error"
+    return 1
+  fi
+
+  # For wildcard cert, the main root domain and the wildcard domain have the same txt subdomain name, so
+  # we can not use updating anymore.
+  #  count=$(printf "%s\n" "$response" | _egrep_o "\"count\":[^,]*" | cut -d : -f 2)
+  #  _debug count "$count"
+  #  if [ "$count" = "0" ]; then
+  _info "Adding record"
+  if _cf_rest POST "zones/$_domain_id/dns_records" "{\"type\":\"TXT\",\"name\":\"$fulldomain\",\"content\":\"$txtvalue\",\"ttl\":120}"; then
+    if _contains "$response" "$txtvalue"; then
+      _info "Added, OK"
+      return 0
+    elif _contains "$response" "The record already exists"; then
+      _info "Already exists, OK"
+      return 0
+    else
+      _err "Add txt record error."
+      return 1
+    fi
+  fi
+  _err "Add txt record error."
+  return 1
+  #  else
+  #    _info "Updating record"
+  #    record_id=$(printf "%s\n" "$response" | _egrep_o "\"id\":\"[^\"]*\"" | cut -d : -f 2 | tr -d \" | head -n 1)
+  #    _debug "record_id" "$record_id"
+  #
+  #    _cf_rest PUT "zones/$_domain_id/dns_records/$record_id" "{\"id\":\"$record_id\",\"type\":\"TXT\",\"name\":\"$fulldomain\",\"content\":\"$txtvalue\",\"zone_id\":\"$_domain_id\",\"zone_name\":\"$_domain\"}"
+  #    if [ "$?" = "0" ]; then
+  #      _info "Updated, OK"
+  #      return 0
+  #    fi
+  #    _err "Update error"
+  #    return 1
+  #  fi
+
+}
+
+#fulldomain txtvalue
+dns_cf_rm() {
+  fulldomain=$1
+  txtvalue=$2
+
+  CF_Key="${CF_Key:-$(_readaccountconf_mutable CF_Key)}"
+  CF_Email="${CF_Email:-$(_readaccountconf_mutable CF_Email)}"
+  if [ -z "$CF_Key" ] || [ -z "$CF_Email" ]; then
+    CF_Key=""
+    CF_Email=""
+    _err "You didn't specify a Cloudflare api key and email yet."
+    _err "You can get yours from here https://dash.cloudflare.com/profile."
+    return 1
+  fi
+
+  _debug "First detect the root zone"
+  if ! _get_root "$fulldomain"; then
+    _err "invalid domain"
+    return 1
+  fi
+  _debug _domain_id "$_domain_id"
+  _debug _sub_domain "$_sub_domain"
+  _debug _domain "$_domain"
+
+  _debug "Getting txt records"
+  _cf_rest GET "zones/${_domain_id}/dns_records?type=TXT&name=$fulldomain&content=$txtvalue"
+
+  if ! printf "%s" "$response" | grep \"success\":true >/dev/null; then
+    _err "Error"
+    return 1
+  fi
+
+  count=$(printf "%s\n" "$response" | _egrep_o "\"count\":[^,]*" | cut -d : -f 2)
+  _debug count "$count"
+  if [ "$count" = "0" ]; then
+    _info "Don't need to remove."
+  else
+    record_id=$(printf "%s\n" "$response" | _egrep_o "\"id\":\"[^\"]*\"" | cut -d : -f 2 | tr -d \" | head -n 1)
+    _debug "record_id" "$record_id"
+    if [ -z "$record_id" ]; then
+      _err "Can not get record id to remove."
+      return 1
+    fi
+    if ! _cf_rest DELETE "zones/$_domain_id/dns_records/$record_id"; then
+      _err "Delete record error."
+      return 1
+    fi
+    _contains "$response" '"success":true'
+  fi
+
+}
+
+####################  Private functions below ##################################
+#_acme-challenge.www.domain.com
+#returns
+# _sub_domain=_acme-challenge.www
+# _domain=domain.com
+# _domain_id=sdjkglgdfewsdfg
+_get_root() {
+  domain=$1
+  i=1
+  p=1
+  while true; do
+    h=$(printf "%s" "$domain" | cut -d . -f $i-100)
+    _debug h "$h"
+    if [ -z "$h" ]; then
+      #not valid
+      return 1
+    fi
+
+    if ! _cf_rest GET "zones?name=$h"; then
+      return 1
+    fi
+
+    if _contains "$response" "\"name\":\"$h\"" || _contains "$response" '"total_count":1'; then
+      _domain_id=$(echo "$response" | _egrep_o "\[.\"id\":\"[^\"]*\"" | _head_n 1 | cut -d : -f 2 | tr -d \")
+      if [ "$_domain_id" ]; then
+        _sub_domain=$(printf "%s" "$domain" | cut -d . -f 1-$p)
+        _domain=$h
+        return 0
+      fi
+      return 1
+    fi
+    p=$i
+    i=$(_math "$i" + 1)
+  done
+  return 1
+}
+
+_cf_rest() {
+  m=$1
+  ep="$2"
+  data="$3"
+  _debug "$ep"
+
+  email_trimmed=$(echo $CF_Email | tr -d '"')
+  key_trimmed=$(echo $CF_Key | tr -d '"')
+
+  export _H1="X-Auth-Email: $email_trimmed"
+  export _H2="X-Auth-Key: $key_trimmed"
+  export _H3="Content-Type: application/json"
+
+  if [ "$m" != "GET" ]; then
+    _debug data "$data"
+    response="$(_post "$data" "$CF_Api/$ep" "" "$m")"
+  else
+    response="$(_get "$CF_Api/$ep")"
+  fi
+
+  if [ "$?" != "0" ]; then
+    _err "error $ep"
+    return 1
+  fi
+  _debug2 response "$response"
+  return 0
+}