diff --git a/README.md b/README.md
index d247707..0ba5eeb 100644
--- a/README.md
+++ b/README.md
@@ -324,6 +324,7 @@ You don't have to do anything manually!
 1. DNSPod.com API (https://www.dnspod.com)
 1. Google Cloud DNS API
 1. ConoHa (https://www.conoha.jp)
+1. netcup DNS API (https://www.netcup.de)
 
 And: 
 
diff --git a/dnsapi/README.md b/dnsapi/README.md
index 15c5026..47862d6 100644
--- a/dnsapi/README.md
+++ b/dnsapi/README.md
@@ -876,6 +876,7 @@ acme.sh --issue --dns dns_tele3 -d example.com -d *.example.com
 ```
 
 The TELE3_Key and TELE3_Secret will be saved in ~/.acme.sh/account.conf and will be reused when needed.
+
 ## 47. Use Euserv.eu API
 
 First you need to login to your euserv.eu account and activate your API Administration (API Verwaltung).
@@ -953,7 +954,22 @@ acme.sh --issue --dns dns_conoha -d example.com -d www.example.com
 
 The `CONOHA_Username`, `CONOHA_Password`, `CONOHA_TenantId` and `CONOHA_IdentityServiceApi` will be saved in `~/.acme.sh/account.conf` and will be reused when needed.
 
-=======
+## 51. Use netcup DNS API to automatically issue cert
+
+First you need to login in your CCP account to get your API Key and API Password.
+```
+export NC_Apikey="<Apikey>"
+export NC_Apipw="<Apipassword>"
+export NC_CID="<Customernumber>"
+```
+
+Now, let's issue a cert:
+```
+acme.sh --issue --dns dns_netcup -d example.com -d www.example.com
+```
+
+The `NC_Apikey`,`NC_Apipw` and `NC_CID` 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_netcup.sh b/dnsapi/dns_netcup.sh
new file mode 100644
index 0000000..2273eb7
--- /dev/null
+++ b/dnsapi/dns_netcup.sh
@@ -0,0 +1,133 @@
+#!/usr/bin/env sh
+#developed by linux-insideDE
+
+NC_Apikey="${NC_Apikey:-$(_readaccountconf_mutable NC_Apikey)}"
+NC_Apipw="${NC_Apipw:-$(_readaccountconf_mutable NC_Apipw)}"
+NC_CID="${NC_CID:-$(_readaccountconf_mutable NC_CID)}"
+end="https://ccp.netcup.net/run/webservice/servers/endpoint.php?JSON"
+client=""
+
+dns_netcup_add() {
+  login
+  if [ "$NC_Apikey" = "" ] || [ "$NC_Apipw" = "" ] || [ "$NC_CID" = "" ]; then
+    _err "No Credentials given"
+    return 1
+  fi
+  _saveaccountconf_mutable NC_Apikey "$NC_Apikey"
+  _saveaccountconf_mutable NC_Apipw "$NC_Apipw"
+  _saveaccountconf_mutable NC_CID "$NC_CID"
+  fulldomain=$1
+  txtvalue=$2
+  domain=""
+  exit=$(echo "$fulldomain" | tr -dc '.' | wc -c)
+  exit=$(_math "$exit" + 1)
+  i=$exit
+
+  while
+    [ "$exit" -gt 0 ]
+  do
+    tmp=$(echo "$fulldomain" | cut -d'.' -f"$exit")
+    if [ "$(_math "$i" - "$exit")" -eq 0 ]; then
+      domain="$tmp"
+    else
+      domain="$tmp.$domain"
+    fi
+    if [ "$(_math "$i" - "$exit")" -ge 1 ]; then
+      msg=$(_post "{\"action\": \"updateDnsRecords\", \"param\": {\"apikey\": \"$NC_Apikey\", \"apisessionid\": \"$sid\", \"customernumber\": \"$NC_CID\",\"clientrequestid\": \"$client\" , \"domainname\": \"$domain\", \"dnsrecordset\": { \"dnsrecords\": [ {\"id\": \"\", \"hostname\": \"$fulldomain.\", \"type\": \"TXT\", \"priority\": \"\", \"destination\": \"$txtvalue\", \"deleterecord\": \"false\", \"state\": \"yes\"} ]}}}" "$end" "" "POST")
+      _debug "$msg"
+      if [ "$(_getfield "$msg" "5" | sed 's/"statuscode"://g')" != 5028 ]; then
+        if [ "$(_getfield "$msg" "4" | sed s/\"status\":\"//g | sed s/\"//g)" != "success" ]; then
+          _err "$msg"
+          return 1
+        else
+          break
+        fi
+      fi
+    fi
+    exit=$(_math "$exit" - 1)
+  done
+  logout
+}
+
+dns_netcup_rm() {
+  login
+  fulldomain=$1
+  txtvalue=$2
+
+  domain=""
+  exit=$(echo "$fulldomain" | tr -dc '.' | wc -c)
+  exit=$(_math "$exit" + 1)
+  i=$exit
+  rec=""
+
+  while
+    [ "$exit" -gt 0 ]
+  do
+    tmp=$(echo "$fulldomain" | cut -d'.' -f"$exit")
+    if [ "$(_math "$i" - "$exit")" -eq 0 ]; then
+      domain="$tmp"
+    else
+      domain="$tmp.$domain"
+    fi
+    if [ "$(_math "$i" - "$exit")" -ge 1 ]; then
+      msg=$(_post "{\"action\": \"infoDnsRecords\", \"param\": {\"apikey\": \"$NC_Apikey\", \"apisessionid\": \"$sid\", \"customernumber\": \"$NC_CID\", \"domainname\": \"$domain\"}}" "$end" "" "POST")
+      rec=$(echo "$msg" | sed 's/\[//g' | sed 's/\]//g' | sed 's/{\"serverrequestid\".*\"dnsrecords\"://g' | sed 's/},{/};{/g' | sed 's/{//g' | sed 's/}//g')
+      _debug "$msg"
+      if [ "$(_getfield "$msg" "5" | sed 's/"statuscode"://g')" != 5028 ]; then
+        if [ "$(_getfield "$msg" "4" | sed s/\"status\":\"//g | sed s/\"//g)" != "success" ]; then
+          _err "$msg"
+          return 1
+        else
+          break
+        fi
+      fi
+    fi
+    exit=$(_math "$exit" - 1)
+  done
+
+  ida=0000
+  idv=0001
+  ids=0000000000
+  i=1
+  while
+    [ "$i" -ne 0 ]
+  do
+    specrec=$(_getfield "$rec" "$i" ";")
+    idv="$ida"
+    ida=$(_getfield "$specrec" "1" "," | sed 's/\"id\":\"//g' | sed 's/\"//g')
+    txtv=$(_getfield "$specrec" "5" "," | sed 's/\"destination\":\"//g' | sed 's/\"//g')
+    i=$(_math "$i" + 1)
+    if [ "$txtvalue" = "$txtv" ]; then
+      i=0
+      ids="$ida"
+    fi
+    if [ "$ida" = "$idv" ]; then
+      i=0
+    fi
+  done
+  msg=$(_post "{\"action\": \"updateDnsRecords\", \"param\": {\"apikey\": \"$NC_Apikey\", \"apisessionid\": \"$sid\", \"customernumber\": \"$NC_CID\",\"clientrequestid\": \"$client\" , \"domainname\": \"$domain\", \"dnsrecordset\": { \"dnsrecords\": [ {\"id\": \"$ids\", \"hostname\": \"$fulldomain.\", \"type\": \"TXT\", \"priority\": \"\", \"destination\": \"$txtvalue\", \"deleterecord\": \"TRUE\", \"state\": \"yes\"} ]}}}" "$end" "" "POST")
+  _debug "$msg"
+  if [ "$(_getfield "$msg" "4" | sed s/\"status\":\"//g | sed s/\"//g)" != "success" ]; then
+    _err "$msg"
+    return 1
+  fi
+  logout
+}
+
+login() {
+  tmp=$(_post "{\"action\": \"login\", \"param\": {\"apikey\": \"$NC_Apikey\", \"apipassword\": \"$NC_Apipw\", \"customernumber\": \"$NC_CID\"}}" "$end" "" "POST")
+  sid=$(_getfield "$tmp" "8" | sed s/\"responsedata\":\{\"apisessionid\":\"//g | sed 's/\"\}\}//g')
+  _debug "$tmp"
+  if [ "$(_getfield "$msg" "4" | sed s/\"status\":\"//g | sed s/\"//g)" != "success" ]; then
+    _err "$msg"
+    return 1
+  fi
+}
+logout() {
+  tmp=$(_post "{\"action\": \"logout\", \"param\": {\"apikey\": \"$NC_Apikey\", \"apisessionid\": \"$sid\", \"customernumber\": \"$NC_CID\"}}" "$end" "" "POST")
+  _debug "$tmp"
+  if [ "$(_getfield "$msg" "4" | sed s/\"status\":\"//g | sed s/\"//g)" != "success" ]; then
+    _err "$msg"
+    return 1
+  fi
+}