diff --git a/dnsapi/dns_wts.sh b/dnsapi/dns_wts.sh
index 8b137891..5ef60f8f 100644
--- a/dnsapi/dns_wts.sh
+++ b/dnsapi/dns_wts.sh
@@ -1 +1,157 @@
+#!/usr/bin/env sh
+# shellcheck disable=SC2034
+dns_wts_info='Wärner Technologie Services
+Site: Waerner-TechServices.de
+Docs: github.com/acmesh-official/acme.sh/wiki/dnsapi2#dns_wts
+Options:
+ WTS_API_Token API Token
+Issues: github.com/acmesh-official/acme.sh/issues/4419
+Author: Lukas Wärner (CEO)
+'
 
+WTS_API="https://wts-api.de/hosting/domain"
+
+########  Public functions ######################
+
+#Usage: dns_wts_add _acme-challenge.domain.waerner-techservices.de "XKrxpRBosdIKFzxW_CT3KLZNf6q0HG9i01zxXp5CPBs"
+dns_wts_add() {
+  fulldomain=$1
+  txtvalue=$2
+
+  WTS_API_Token="${WTS_API_Token:-$(_readaccountconf_mutable WTS_API_Token)}"
+  if [ -z "$WTS_API_Token" ]; then
+    _err "You must export variable: WTS_API_Token"
+    _err "The API Key for your WTS account is necessary."
+    _err "You can look it up in your WTS account."
+    return 1
+  fi
+
+  # Now save the credentials.
+  _saveaccountconf_mutable WTS_API_Token "$WTS_API_Token"
+
+  if ! _get_root "$fulldomain"; then
+    _err "invalid domain" "$fulldomain"
+    return 1
+  fi
+  _debug _sub_domain "$_sub_domain"
+  _debug _domain "$_domain"
+
+  # convert to lower case
+  _domain="$(echo "$_domain" | _lower_case)"
+  _sub_domain="$(echo "$_sub_domain" | _lower_case)"
+  # Now add the TXT record
+  _info "Trying to add TXT record"
+  if _WTS_rest "POST" "add_record=$_domain&praefix=$_sub_domain&type=TXT&content=$txtvalue"; then
+    _info "TXT record has been successfully added."
+    return 0
+  else
+    _err "Errors happened during adding the TXT record, response=$_response"
+    return 1
+  fi
+
+}
+
+#Usage: fulldomain txtvalue
+#Usage: dns_wts_rm _acme-challenge.domain.waerner-techservices.de "XKrxpRBosdIKFzxW_CT3KLZNf6q0HG9i01zxXp5CPBs"
+#Remove the txt record after validation.
+dns_wts_rm() {
+  fulldomain=$1
+  txtvalue=$2
+
+  WTS_API_Token="${WTS_API_Token:-$(_readaccountconf_mutable WTS_API_Token)}"
+  if [ -z "$WTS_API_Token" ]; then
+    _err "You must export variable: WTS_API_Token"
+    _err "The API Key for your WTS account is necessary."
+    _err "You can look it up in your WTS account."
+    return 1
+  fi
+
+  if ! _get_root "$fulldomain"; then
+    _err "invalid domain" "$fulldomain"
+    return 1
+  fi
+  _debug _sub_domain "$_sub_domain"
+  _debug _domain "$_domain"
+
+  # convert to lower case
+  _domain="$(echo "$_domain" | _lower_case)"
+  _sub_domain="$(echo "$_sub_domain" | _lower_case)"
+  # Now delete the TXT record
+  _info "Trying to delete TXT record"
+  if _WTS_rest "DELETE" "del_record=$_domain&praefix=$_sub_domain&type=TXT&content=$txtvalue"; then
+    _info "TXT record has been successfully deleted."
+    return 0
+  else
+    _err "Errors happened during deleting the TXT record, response=$_response"
+    return 1
+  fi
+
+}
+
+####################  Private functions below ##################################
+#_acme-challenge.www.domain.com
+#returns
+# _sub_domain=_acme-challenge.www
+# _domain=domain.com
+_get_root() {
+  domain="$1"
+  i=1
+  p=1
+
+  _WTS_get "get_domains"
+  domain_data=$_response
+
+  while true; do
+    h=$(printf "%s" "$domain" | cut -d . -f "$i"-100)
+    if [ -z "$h" ]; then
+      #not valid
+      return 1
+    fi
+
+    #if _contains "$domain_data" "\""$h"\"\:"; then
+    if _contains "$domain_data" "\"""$h""\"\:"; then
+      _sub_domain=$(printf "%s" "$domain" | cut -d . -f 1-"$p")
+      _domain="$h"
+      return 0
+    fi
+    p=$i
+    i=$(_math "$i" + 1)
+  done
+  return 1
+}
+
+#send get request to api
+# $1 has to set the api-function
+_WTS_get() {
+  url="$WTS_API?$1"
+  export _H1="Authorization: Bearer $WTS_API_Token"
+
+  _response=$(_get "$url")
+  _response="$(echo "$_response" | _normalizeJson)"
+
+  if _contains "$_response" "429 Too Many Requests"; then
+    _info "API throttled, sleeping to reset the limit"
+    _sleep 10
+    _response=$(_get "$url")
+    _response="$(echo "$_response" | _normalizeJson)"
+  fi
+}
+
+_WTS_rest() {
+  url="$WTS_API"
+  export _H1="Authorization: Bearer $WTS_API_Token"
+  export _H2="Content-Type: application/x-www-form-urlencoded"
+  _response=$(_post "$2" "$url" "" "$1")
+
+  if _contains "$_response" "429 Too Many Requests"; then
+    _info "API throttled, sleeping to reset the limit"
+    _sleep 10
+    _response=$(_post "$2" "$url" "" "$1")
+  fi
+
+  if ! _contains "$_response" "\"info\":\"success\""; then
+    return 1
+  fi
+  _debug2 response "$_response"
+  return 0
+}