diff --git a/dnsapi/dns_opnsense.sh b/dnsapi/dns_opnsense.sh
new file mode 100755
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+++ b/dnsapi/dns_opnsense.sh
@@ -0,0 +1,273 @@
+#!/usr/bin/env sh
+
+#OPNsense Bind API
+#https://docs.opnsense.org/development/api.html
+#
+#OPNs_Host="opnsense.example.com"
+#OPNs_Port="443"
+# optional, defaults to 443 if unset
+#OPNs_Key="qocfU9RSbt8vTIBcnW8bPqCrpfAHMDvj5OzadE7Str+rbjyCyk7u6yMrSCHtBXabgDDXx/dY0POUp7ZA"
+#OPNs_Token="pZEQ+3ce8dDlfBBdg3N8EpqpF5I1MhFqdxX06le6Gl8YzyQvYCfCzNaFX9O9+IOSyAs7X71fwdRiZ+Lv"
+#OPNs_Api_Insecure=0
+# optional, defaults to 0 if unset
+# Set 1 for insecure and 0 for secure -> difference is whether ssl cert is checked for validity (0) or whether it is just accepted (1)
+
+########  Public functions #####################
+#Usage: add _acme-challenge.www.domain.com "123456789ABCDEF0000000000000000000000000000000000000"
+#fulldomain
+#txtvalue
+OPNs_DefaultPort=443
+OPNs_DefaultApi_Insecure=0
+
+dns_opnsense_add() {
+  fulldomain=$1
+  txtvalue=$2
+
+  _opns_check_auth || return 1
+
+  if ! set_record "$fulldomain" "$txtvalue"; then
+    return 1
+  fi
+
+  return 0
+}
+
+#fulldomain
+dns_opnsense_rm() {
+  fulldomain=$1
+  txtvalue=$2
+
+  _opns_check_auth || return 1
+
+  if ! rm_record "$fulldomain" "$txtvalue"; then
+    return 1
+  fi
+
+  return 0
+}
+
+set_record() {
+  fulldomain=$1
+  new_challenge=$2
+  _info "Adding record $fulldomain with challenge: $new_challenge"
+
+  _debug "Detect root zone"
+  if ! _get_root "$fulldomain"; then
+    _err "invalid domain"
+    return 1
+  fi
+
+  _debug _domain "$_domain"
+  _debug _host "$_host"
+  _debug _domainid "$_domainid"
+  _return_str=""
+  _record_string=""
+  _build_record_string "$_domainid" "$_host" "$new_challenge"
+  _uuid=""
+  if _existingchallenge "$_domain" "$_host" "$new_challenge"; then
+    # Update
+    if _opns_rest "POST" "/record/setRecord/${_uuid}" "$_record_string"; then
+      _return_str="$response"
+    else
+      return 1
+    fi
+
+  else
+    #create
+    if _opns_rest "POST" "/record/addRecord" "$_record_string"; then
+      _return_str="$response"
+    else
+      return 1
+    fi
+  fi
+
+  if echo "$_return_str" | _egrep_o "\"result\":\"saved\"" >/dev/null; then
+    _opns_rest "POST" "/service/reconfigure" "{}"
+    _debug "Record created"
+  else
+    _err "Error creating record $_record_string"
+    return 1
+  fi
+
+  return 0
+}
+
+rm_record() {
+  fulldomain=$1
+  new_challenge="$2"
+  _info "Remove record $fulldomain with challenge: $new_challenge"
+
+  _debug "Detect root zone"
+  if ! _get_root "$fulldomain"; then
+    _err "invalid domain"
+    return 1
+  fi
+
+  _debug _domain "$_domain"
+  _debug _host "$_host"
+  _debug _domainid "$_domainid"
+  _uuid=""
+  if _existingchallenge "$_domain" "$_host" "$new_challenge"; then
+    # Delete
+    if _opns_rest "POST" "/record/delRecord/${_uuid}" "\{\}"; then
+      if echo "$_return_str" | _egrep_o "\"result\":\"deleted\"" >/dev/null; then
+        _opns_rest "POST" "/service/reconfigure" "{}"
+        _debug "Record deleted"
+      else
+        _err "Error deleting record $_host from domain $fulldomain"
+        return 1
+      fi
+    else
+      _err "Error deleting record $_host from domain $fulldomain"
+      return 1
+    fi
+  else
+    _info "Record not found, nothing to remove"
+  fi
+
+  return 0
+}
+
+####################  Private functions below ##################################
+#_acme-challenge.www.domain.com
+#returns
+# _domainid=domid
+#_domain=domain.com
+_get_root() {
+  domain=$1
+  i=2
+  p=1
+  if _opns_rest "GET" "/domain/get"; then
+    _domain_response="$response"
+  else
+    return 1
+  fi
+
+  while true; do
+    h=$(printf "%s" "$domain" | cut -d . -f $i-100)
+    if [ -z "$h" ]; then
+      #not valid
+      return 1
+    fi
+    _debug h "$h"
+    id=$(echo "$_domain_response" | _egrep_o "\"[^\"]*\":{\"enabled\":\"1\",\"type\":{\"master\":{\"value\":\"master\",\"selected\":1},\"slave\":{\"value\":\"slave\",\"selected\":0}},\"masterip\":\"[^\"]*\",\"domainname\":\"${h}\"" | cut -d ':' -f 1 | cut -d '"' -f 2)
+
+    if [ -n "$id" ]; then
+      _debug id "$id"
+      _host=$(printf "%s" "$domain" | cut -d . -f 1-$p)
+      _domain="${h}"
+      _domainid="${id}"
+      return 0
+    fi
+    p=$i
+    i=$(_math $i + 1)
+  done
+  _debug "$domain not found"
+
+  return 1
+}
+
+_opns_rest() {
+  method=$1
+  ep=$2
+  data=$3
+  #Percent encode user and token
+  key=$(echo "$OPNs_Key" | tr -d "\n\r" | _url_encode)
+  token=$(echo "$OPNs_Token" | tr -d "\n\r" | _url_encode)
+
+  opnsense_url="https://${key}:${token}@${OPNs_Host}:${OPNs_Port:-$OPNs_DefaultPort}/api/bind${ep}"
+  export _H1="Content-Type: application/json"
+  _debug2 "Try to call api: https://${OPNs_Host}:${OPNs_Port:-$OPNs_DefaultPort}/api/bind${ep}"
+  if [ ! "$method" = "GET" ]; then
+    _debug data "$data"
+    export _H1="Content-Type: application/json"
+    response="$(_post "$data" "$opnsense_url" "" "$method")"
+  else
+    export _H1=""
+    response="$(_get "$opnsense_url")"
+  fi
+
+  if [ "$?" != "0" ]; then
+    _err "error $ep"
+    return 1
+  fi
+  _debug2 response "$response"
+
+  return 0
+}
+
+_build_record_string() {
+  _record_string="{\"record\":{\"enabled\":\"1\",\"domain\":\"$1\",\"name\":\"$2\",\"type\":\"TXT\",\"value\":\"$3\"}}"
+}
+
+_existingchallenge() {
+  if _opns_rest "GET" "/record/searchRecord"; then
+    _record_response="$response"
+  else
+    return 1
+  fi
+  _uuid=""
+  _uuid=$(echo "$_record_response" | _egrep_o "\"uuid\":\"[^\"]*\",\"enabled\":\"[01]\",\"domain\":\"$1\",\"name\":\"$2\",\"type\":\"TXT\",\"value\":\"$3\"" | cut -d ':' -f 2 | cut -d '"' -f 2)
+
+  if [ -n "$_uuid" ]; then
+    _debug uuid "$_uuid"
+    return 0
+  fi
+  _debug "${2}.$1{1} record not found"
+
+  return 1
+}
+
+_opns_check_auth() {
+  OPNs_Host="${OPNs_Host:-$(_readaccountconf_mutable OPNs_Host)}"
+  OPNs_Port="${OPNs_Port:-$(_readaccountconf_mutable OPNs_Port)}"
+  OPNs_Key="${OPNs_Key:-$(_readaccountconf_mutable OPNs_Key)}"
+  OPNs_Token="${OPNs_Token:-$(_readaccountconf_mutable OPNs_Token)}"
+  OPNs_Api_Insecure="${OPNs_Api_Insecure:-$(_readaccountconf_mutable OPNs_Api_Insecure)}"
+
+  if [ -z "$OPNs_Host" ]; then
+    _err "You don't specify OPNsense address."
+    return 1
+  else
+    _saveaccountconf_mutable OPNs_Host "$OPNs_Host"
+  fi
+
+  if ! printf '%s' "$OPNs_Port" | grep '^[0-9]*$' >/dev/null; then
+    _err 'OPNs_Port specified but not numeric value'
+    return 1
+  elif [ -z "$OPNs_Port" ]; then
+    _info "OPNSense port not specified. Defaulting to using port $OPNs_DefaultPort"
+  else
+    _saveaccountconf_mutable OPNs_Port "$OPNs_Port"
+  fi
+
+  if ! printf '%s' "$OPNs_Api_Insecure" | grep '^[01]$' >/dev/null; then
+    _err 'OPNs_Api_Insecure specified but not 0/1 value'
+    return 1
+  elif [ -n "$OPNs_Api_Insecure" ]; then
+    _saveaccountconf_mutable OPNs_Api_Insecure "$OPNs_Api_Insecure"
+  fi
+  export HTTPS_INSECURE="${OPNs_Api_Insecure:-$OPNs_DefaultApi_Insecure}"
+
+  if [ -z "$OPNs_Key" ]; then
+    _err "you have not specified your OPNsense api key id."
+    _err "Please set OPNs_Key and try again."
+    return 1
+  else
+    _saveaccountconf_mutable OPNs_Key "$OPNs_Key"
+  fi
+
+  if [ -z "$OPNs_Token" ]; then
+    _err "you have not specified your OPNsense token."
+    _err "Please create OPNs_Token and try again."
+    return 1
+  else
+    _saveaccountconf_mutable OPNs_Token "$OPNs_Token"
+  fi
+
+  if ! _opns_rest "GET" "/general/get"; then
+    _err "Call to OPNsense API interface failed. Unable to access OPNsense API."
+    return 1
+  fi
+  return 0
+}