diff --git a/README.md b/README.md
index b33f8636..c8aeeb0f 100644
--- a/README.md
+++ b/README.md
@@ -293,6 +293,7 @@ You don't have to do anything manually!
 1. Linode.com API
 1. FreeDNS (https://freedns.afraid.org/)
 1. cyon.ch
+1. Domain-Offensive/Resellerinterface/Domainrobot API
 
 **More APIs coming soon...**
 
diff --git a/dnsapi/README.md b/dnsapi/README.md
index fd88d579..7df7142a 100644
--- a/dnsapi/README.md
+++ b/dnsapi/README.md
@@ -323,6 +323,19 @@ acme.sh --issue --dns dns_cyon -d example.com -d www.example.com
 
 The `CY_Username`, `CY_Password` and `CY_OTP_Secret` will be saved in `~/.acme.sh/account.conf` and will be reused when needed.
 
+## 17. Use Domain-Offensive/Resellerinterface/Domainrobot API
+
+You will need your login credentials (Partner ID+Password) to the Resellerinterface, and export them before you run `acme.sh`:
+```
+export DO_PID="KD-1234567"
+export DO_PW="cdfkjl3n2"
+```
+
+Ok, let's issue a cert now:
+```
+acme.sh --issue --dns dns_do -d example.com -d www.example.com
+```
+
 # Use custom API
 
 If your API is not supported yet, you can write your own DNS API.
diff --git a/dnsapi/dns_do.sh b/dnsapi/dns_do.sh
new file mode 100755
index 00000000..3a2f8f49
--- /dev/null
+++ b/dnsapi/dns_do.sh
@@ -0,0 +1,148 @@
+#!/usr/bin/env sh
+
+# DNS API for Domain-Offensive / Resellerinterface / Domainrobot
+
+# Report bugs at https://github.com/seidler2547/acme.sh/issues
+
+# set these environment variables to match your customer ID and password:
+# 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
+  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
+  if _dns_do_authenticate; then
+    if _dns_do_list_rrs; then
+      _dns_do_had_error=0
+      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
+          _dns_do_had_error=1
+          _err "Could not delete resource record for ${_domain}, id ${_rrid}"
+        fi
+      done
+      return $_dns_do_had_error
+    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 $_domain"
+    return 0
+  else
+    _err "Authentication failed, are DO_PID and DO_PW set correctly?"
+  fi
+  return 1
+}
+
+_dns_do_list_rrs() {
+  _dns_do_soap getRRList origin "${_domain}"
+  if ! _contains "${response}" 'SOAP-ENC:Array'; then
+    _err "getRRList origin ${_domain} failed"
+    return 1
+  fi
+  _rr_list="$(echo "${response}" \
+    | tr -d "\n\r\t" \
+    | sed -e 's/<item xsi:type="ns2:Map">/\n/g' \
+    | grep ">$(_regexcape "$fulldomain")</value>" \
+    | sed -e 's/<\/item>/\n/g' \
+    | grep '>id</key><value' \
+    | _egrep_o '>[0-9]{1,16}<' \
+    | tr -d '><')"
+  [ "${_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
+  export _H1="SOAPAction: ${DO_URL}#${func}"
+
+  if ! response="$(_post "${_xml}" "${DO_URL}")"; then
+    _err "Error <$1>"
+    return 1
+  fi
+  _debug2 "SOAP response $response"
+
+  # retrieve cookie header
+  _H2="$(_egrep_o 'Cookie: [^;]+' <"$HTTP_HEADER" | _head_n 1)"
+  export _H2
+
+  return 0
+}
+
+_get_root() {
+  domain=$1
+  i=1
+
+  _dns_do_soap getDomainList
+  _all_domains="$(echo "${response}" \
+    | tr -d "\n\r\t " \
+    | _egrep_o 'domain</key><value[^>]+>[^<]+' \
+    | sed -e 's/^domain<\/key><value[^>]*>//g')"
+
+  while true; do
+    h=$(printf "%s" "$domain" | cut -d . -f $i-100)
+    if [ -z "$h" ]; then
+      return 1
+    fi
+
+    if _contains "${_all_domains}" "^$(_regexcape "$h")\$"; then
+      _domain="$h"
+      return 0
+    fi
+
+    i=$(_math $i + 1)
+  done
+  _debug "$domain not found"
+
+  return 1
+}
+
+_regexcape() {
+  echo "$1" | sed -e 's/\([]\.$*^[]\)/\\\1/g'
+}