diff --git a/README.md b/README.md
index 7d4353c..e8f9464 100644
--- a/README.md
+++ b/README.md
@@ -339,6 +339,7 @@ You don't have to do anything manually!
 1. Dyn Managed DNS API
 1. Yandex PDD API (https://pdd.yandex.ru)
 1. Hurricane Electric DNS service (https://dns.he.net)
+1. INWX (https://www.inwx.de/)
 
 
 And: 
diff --git a/dnsapi/README.md b/dnsapi/README.md
index cff59c7..768f69a 100644
--- a/dnsapi/README.md
+++ b/dnsapi/README.md
@@ -602,6 +602,23 @@ The `HE_Username` and `HE_Password` settings will be saved in `~/.acme.sh/accoun
 
 Please report any issues to https://github.com/angel333/acme.sh or to <me@ondrejsimek.com>.
 
+## 31. Use INWX
+
+INWX offers an xmlrpc api with your standard login credentials, set them like so:
+
+```
+export INWX_User="yourusername"
+export INWX_Password="password"
+```
+
+Then you can issue your certificates with:
+
+```
+acme.sh --issue --dns dns_inwx -d example.com -d www.example.com
+```
+
+The `INWX_User` and `INWX_Password` settings will be saved in `~/.acme.sh/account.conf` and will be reused when needed.
+
 # Use custom API
 
 If your API is not supported yet, you can write your own DNS API.
diff --git a/dnsapi/dns_inwx.sh b/dnsapi/dns_inwx.sh
new file mode 100755
index 0000000..db5b18c
--- /dev/null
+++ b/dnsapi/dns_inwx.sh
@@ -0,0 +1,365 @@
+#!/usr/local/bin/bash
+
+#
+#INWX_User="username"
+#
+#INWX_Password="password"
+
+INWX_Api="https://api.domrobot.com/xmlrpc/"
+
+########  Public functions #####################
+
+#Usage: add  _acme-challenge.www.domain.com   "XKrxpRBosdIKFzxW_CT3KLZNf6q0HG9i01zxXp5CPBs"
+dns_inwx_add() {
+  fulldomain=$1
+  txtvalue=$2
+
+  INWX_User="${INWX_User:-$(_readaccountconf_mutable INWX_User)}"
+  INWX_Password="${INWX_Password:-$(_readaccountconf_mutable INWX_Password)}"
+  if [ -z "$INWX_User" ] || [ -z "$INWX_Password" ]; then
+    INWX_User=""
+    INWX_Password=""
+    _err "You don't specify inwx user and password yet."
+    _err "Please create you key and try again."
+    return 1
+  fi
+
+  #save the api key and email to the account conf file.
+  _saveaccountconf_mutable INWX_User "$INWX_User"
+  _saveaccountconf_mutable INWX_Password "$INWX_Password"
+
+  _debug "First detect the root zone"
+  if ! _get_root "$fulldomain"; then
+    _err "invalid domain"
+    return 1
+  fi
+  _debug _sub_domain "$_sub_domain"
+  _debug _domain "$_domain"
+
+  _debug "Getting txt records"
+
+
+  printf -v xml_content  '<?xml version="1.0" encoding="UTF-8"?>
+  <methodCall>
+  <methodName>nameserver.info</methodName>
+  <params>
+   <param>
+    <value>
+     <struct>
+      <member>
+       <name>domain</name>
+       <value>
+        <string>%s</string>
+       </value>
+      </member>
+      <member>
+       <name>type</name>
+       <value>
+        <string>TXT</string>
+       </value>
+      </member>
+      <member>
+       <name>name</name>
+       <value>
+        <string>%s</string>
+       </value>
+      </member>
+     </struct>
+    </value>
+   </param>
+  </params>
+  </methodCall>' $_domain $_sub_domain
+  response="$(_post "$xml_content" "$INWX_Api" "" "POST")"
+
+  if ! printf "%s" "$response" | grep "Command completed successfully" > /dev/null; then
+    _err "Error could net get txt records"
+    return 1
+  fi
+
+  if ! printf "%s" "$response" | grep "count" -q; then
+    _info "Adding record"
+    _inwx_add_record $_domain $_sub_domain $txtvalue
+  else
+    _record_id=$(printf '%s' $response |  sed -nE 's/.*(<member><name>record){1}(.*)(<name>id<\/name><value><int>)([0-9]+){1}.*/\4/p')
+    _info "Updating record"
+    _inwx_update_record $_record_id $txtvalue
+  fi
+
+}
+
+#fulldomain txtvalue
+dns_inwx_rm() {
+
+  fulldomain=$1
+  txtvalue=$2
+
+  INWX_User="${INWX_User:-$(_readaccountconf_mutable INWX_User)}"
+  INWX_Password="${INWX_Password:-$(_readaccountconf_mutable INWX_Password)}"
+  if [ -z "$INWX_User" ] || [ -z "$INWX_Password" ]; then
+    INWX_User=""
+    INWX_Password=""
+    _err "You don't specify inwx user and password yet."
+    _err "Please create you key and try again."
+    return 1
+  fi
+
+  #save the api key and email to the account conf file.
+  _saveaccountconf_mutable INWX_User "$INWX_User"
+  _saveaccountconf_mutable INWX_Password "$INWX_Password"
+
+  _debug "First detect the root zone"
+  if ! _get_root "$fulldomain"; then
+    _err "invalid domain"
+    return 1
+  fi
+  _debug _sub_domain "$_sub_domain"
+  _debug _domain "$_domain"
+
+  _debug "Getting txt records"
+
+
+  printf -v xml_content  '<?xml version="1.0" encoding="UTF-8"?>
+  <methodCall>
+  <methodName>nameserver.info</methodName>
+  <params>
+   <param>
+    <value>
+     <struct>
+      <member>
+       <name>domain</name>
+       <value>
+        <string>%s</string>
+       </value>
+      </member>
+      <member>
+       <name>type</name>
+       <value>
+        <string>TXT</string>
+       </value>
+      </member>
+      <member>
+       <name>name</name>
+       <value>
+        <string>%s</string>
+       </value>
+      </member>
+     </struct>
+    </value>
+   </param>
+  </params>
+  </methodCall>' $_domain $_sub_domain
+  response="$(_post "$xml_content" "$INWX_Api" "" "POST")"
+
+  if ! printf "%s" "$response" | grep "Command completed successfully" > /dev/null; then
+    _err "Error could not get txt records"
+    return 1
+  fi
+
+  if ! printf "%s" "$response" | grep "count" -q; then
+    _info "Do not need to delete record"
+  else
+    _record_id=$(printf '%s' $response |  sed -nE 's/.*(<member><name>record){1}(.*)(<name>id<\/name><value><int>)([0-9]+){1}.*/\4/p')
+    _info "Deleting record"
+    _inwx_delete_record $_record_id
+  fi
+
+
+}
+
+####################  Private functions below ##################################
+
+_inwx_login() {
+
+  printf -v xml_content '<?xml version="1.0" encoding="UTF-8"?>
+  <methodCall>
+  <methodName>account.login</methodName>
+  <params>
+   <param>
+    <value>
+     <struct>
+      <member>
+       <name>user</name>
+       <value>
+        <string>%s</string>
+       </value>
+      </member>
+      <member>
+       <name>pass</name>
+       <value>
+        <string>%s</string>
+       </value>
+      </member>
+     </struct>
+    </value>
+   </param>
+  </params>
+  </methodCall>' $INWX_User $INWX_Password
+
+  response="$(_post "$xml_content" "$INWX_Api" "" "POST")"
+  
+  printf "Cookie: %s" "$(grep "domrobot=" "$HTTP_HEADER" | grep "^Set-Cookie:" | _tail_n 1 | _egrep_o 'domrobot=[^;]*;' | tr -d ';')"
+
+}
+
+_get_root() {
+  domain=$1 
+  _debug "get root"
+
+  domain=$1
+  i=2
+  p=1
+
+
+  export _H1=$(_inwx_login)
+  printf -v xml_content '<?xml version="1.0" encoding="UTF-8"?>
+  <methodCall>
+  <methodName>nameserver.list</methodName>
+  </methodCall>'
+  
+  response="$(_post "$xml_content" "$INWX_Api" "" "POST")"
+  while true; do
+    h=$(printf "%s" "$domain" | cut -d . -f $i-100)
+    _debug h "$h"
+    if [ -z "$h" ]; then
+      #not valid
+      return 1
+    fi
+
+    if _contains "$response" "$h"; then
+      _sub_domain=$(printf "%s" "$domain" | cut -d . -f 1-$p)
+      _domain="$h"
+      return 0
+    fi
+    p=$i
+    i=$(_math "$i" + 1)
+  done
+  return 1
+
+}
+
+_inwx_delete_record() {
+  record_id=$1
+  printf -v xml_content '<?xml version="1.0" encoding="UTF-8"?>
+  <methodCall>
+  <methodName>nameserver.deleteRecord</methodName>
+  <params>
+   <param>
+    <value>
+     <struct>
+      <member>
+       <name>id</name>
+       <value>
+        <int>%s</int>
+       </value>
+      </member>
+     </struct>
+    </value>
+   </param>
+  </params>
+  </methodCall>' $record_id
+  
+  response="$(_post "$xml_content" "$INWX_Api" "" "POST")"
+  
+  if ! printf "%s" "$response" | grep "Command completed successfully" >/dev/null; then
+    _err "Error"
+    return 1
+  fi
+  return 0
+  
+  
+}
+
+_inwx_update_record() {
+  record_id=$1
+  txtval=$2
+  printf -v xml_content '<?xml version="1.0" encoding="UTF-8"?>
+  <methodCall>
+  <methodName>nameserver.updateRecord</methodName>
+  <params>
+   <param>
+    <value>
+     <struct>
+      <member>
+       <name>content</name>
+       <value>
+        <string>%s</string>
+       </value>
+      </member>
+      <member>
+       <name>id</name>
+       <value>
+        <int>%s</int>
+       </value>
+      </member>
+     </struct>
+    </value>
+   </param>
+  </params>
+  </methodCall>' $txtval $record_id
+  
+  
+  response="$(_post "$xml_content" "$INWX_Api" "" "POST")"
+  
+  if ! printf "%s" "$response" | grep "Command completed successfully" >/dev/null; then
+    _err "Error"
+    return 1
+  fi
+  return 0
+  
+}
+
+_inwx_add_record() {
+
+  domain=$1
+  sub_domain=$2
+  txtval=$3
+
+  _debug domain: $domain
+  _debug value: $txtval
+  _debug subd: $sub_domain
+
+  printf -v xml_content '<?xml version="1.0" encoding="UTF-8"?>
+  <methodCall>
+  <methodName>nameserver.createRecord</methodName>
+  <params>
+   <param>
+    <value>
+     <struct>
+      <member>
+       <name>domain</name>
+       <value>
+        <string>%s</string>
+       </value>
+      </member>
+      <member>
+       <name>type</name>
+       <value>
+        <string>TXT</string>
+       </value>
+      </member>
+      <member>
+       <name>content</name>
+       <value>
+        <string>%s</string>
+       </value>
+      </member>
+      <member>
+       <name>name</name>
+       <value>
+        <string>%s</string>
+       </value>
+      </member>
+     </struct>
+    </value>
+   </param>
+  </params>
+  </methodCall>' $domain $txtval $sub_domain
+  
+  response="$(_post "$xml_content" "$INWX_Api" "" "POST")"
+  
+  if ! printf "%s" "$response" | grep "Command completed successfully" >/dev/null; then
+    _err "Error"
+    return 1
+  fi
+  return 0
+}