diff --git a/dnsapi/dns_do.sh b/dnsapi/dns_do.sh
new file mode 100755
index 00000000..43ce678f
--- /dev/null
+++ b/dnsapi/dns_do.sh
@@ -0,0 +1,167 @@
+#!/usr/bin/env sh
+
+# DNS API for Domain-Offensive / Resellerinterface / Domainrobot
+
+# DO_PID="KD-1234567"
+# DO_PW="cdfkjl3n2"
+
+DO_URL="https://soap.resellerinterface.de/"
+
+########  Public functions #####################
+
+#Usage: dns_myapi_add   _acme-challenge.www.domain.com   "XKrxpRBosdIKFzxW_CT3KLZNf6q0HG9i01zxXp5CPBs"
+dns_do_add() {
+  fulldomain=$1
+  txtvalue=$2
+  _cookiejar="$(_mktemp)"
+  if _dns_do_authenticate; then
+    _info "Adding TXT record to ${_domain} as ${fulldomain}"
+    _dns_do_soap createRR origin "${_domain}" name "${fulldomain}" type TXT data "${txtvalue}" ttl 300
+    if _contains "${response}" '>success<'; then
+      return 0
+    fi
+    _err "Could not create resource record, check logs"
+  fi
+  return 1
+}
+
+#fulldomain
+dns_do_rm() {
+  fulldomain=$1
+  _cookiejar="$(_mktemp)"
+  if _dns_do_authenticate; then
+    if _dns_do_list_rrs; then
+      for _rrid in ${_rr_list}; do
+        _info "Deleting resource record $_rrid for $_domain"
+        _dns_do_soap deleteRR origin "${_domain}" rrid "${_rrid}"
+        if ! _contains "${response}" '>success<'; then
+          _err "Could not delete resource record for ${_domain}, id ${_rrid}"
+        fi
+      done
+      return 0
+    fi
+  fi
+  return 1
+}
+
+####################  Private functions below ##################################
+_dns_do_authenticate() {
+  _info "Authenticating as ${DO_PID}"
+  _dns_do_soap authPartner partner "${DO_PID}" password "${DO_PW}"
+  if _contains "${response}" '>success<'; then
+    _get_root "$fulldomain"
+    _debug "_domain $_domain"
+    return 0
+  else
+    _err "Authentication failed, check logs"
+  fi
+  return 1
+}
+
+_dns_do_list_rrs() {
+  _dns_do_soap getRRList origin "${_domain}"
+  if ! _contains "${response}" 'SOAP-ENC:Array'; then
+    _err "getRRList origin ${_domain} failed"
+    return 1
+  fi
+  _rr_list="$(echo "${response}" \
+    | tr -d "\n\r\t" \
+    | sed -e 's/<item xsi:type="ns2:Map">/\n/g' \
+    | grep -F ">${fulldomain}</value>" \
+    | sed -e 's/<item>/\n\0/g' \
+    | grep -F '>id</key>' \
+    | sed -re 's/.*<value[^>]*>([^<]+)<\/value>.*/\1/')"
+  [ "${_rr_list}" ]
+}
+
+_dns_do_soap() {
+  func="$1"
+  shift
+  # put the parameters to xml
+  body="<tns:${func} xmlns:tns=\"${DO_URL}\">"
+  while [ "$1" ] ; do
+    _k="$1"
+    shift
+    _v="$1"
+    shift
+    body="$body<$_k>$_v</$_k>"
+  done
+  body="$body</tns:${func}>"
+  _debug2 "SOAP request ${body}"
+
+  # build SOAP XML
+  _xml='<?xml version="1.0" encoding="UTF-8"?>
+<env:Envelope xmlns:env="http://schemas.xmlsoap.org/soap/envelope/">
+  <env:Body>'"$body"'</env:Body>
+</env:Envelope>'
+
+  # set SOAP headers
+  _H1="SOAPAction: ${DO_URL}#${func}"
+  # add cookie header if present
+  [ -s "${_cookiejar}" ] && _H2="$(cat "${_cookiejar}")"
+
+  if ! response="$(_post "${_xml}" "${DO_URL}")"; then
+    _err "Error <$1>"
+    return 1
+  fi
+  _debug2 "SOAP response $response"
+
+  # retrieve cookie header
+  grep -F 'Set-Cookie:' "$HTTP_HEADER" | sed -re 's/^Set-(Cookie: [^;]+).*/\1/' | head -1 > "${_cookiejar}"
+
+  return 0
+}
+
+_get_root() {
+  domain=$1
+  i=1
+
+  _all_domains="$(_mktemp)"
+  _dns_do_soap getDomainList
+  echo "${response}" | tr -d "\n\r\t " | grep -Eo 'domain</key><value[^>]+>[^<]+' | sed -re 's/^domain<\/key><value[^>]+>//g' > "${_all_domains}"
+
+  while true; do
+    h=$(printf "%s" "$domain" | cut -d . -f $i-100)
+    if [ -z "$h" ]; then
+      return 1
+    fi
+
+    if grep -qF "$h" "${_all_domains}"; then
+      _domain="$h"
+      return 0
+    fi
+
+    i=$(_math $i + 1)
+  done
+  _debug "$domain not found"
+
+  return 1
+}
+
+_info() {
+  if [ -z "$2" ]; then
+    echo "[$(date)] $1"
+  else
+    echo "[$(date)] $1='$2'"
+  fi
+}
+
+_err() {
+  _info "$@" >&2
+  return 1
+}
+
+_debug() {
+  if [ -z "$DEBUG" ]; then
+    return
+  fi
+  _err "$@"
+  return 0
+}
+
+_debug2() {
+  if [ "$DEBUG" ] && [ "$DEBUG" -ge "2" ]; then
+    _debug "$@"
+  fi
+  return
+}