diff --git a/dnsapi/dns_pdnsMysql.sh b/dnsapi/dns_pdnsMysql.sh
new file mode 100644
index 00000000..b4e6ff49
--- /dev/null
+++ b/dnsapi/dns_pdnsMysql.sh
@@ -0,0 +1,172 @@
+#!/usr/bin/env sh
+
+#PowerDNS Mysql backend
+#
+#
+PDNS_Host="example.com"
+PDNS_Port=3306
+PDNS_User="username"
+PDNS_Pass="password"
+PDNS_Database="powerdns"
+PDNS_Ttl=60
+
+DEFAULT_PDNS_TTL=60
+
+########  Public functions #####################
+#Usage: add _acme-challenge.www.domain.com "123456789ABCDEF0000000000000000000000000000000000000"
+#fulldomain
+#txtvalue
+dns_pdnsMysql_add() {
+  fulldomain=$1
+  txtvalue=$2
+
+  if [ -z "$PDNS_Host" ]; then
+    PDNS_Url=""
+    _err "You didn't specify PowerDNS Mysql address."
+    _err "Please set PDNS_Host and try again."
+    return 1
+  fi
+
+  if [ -z "$PDNS_Port" ]; then
+    PDNS_Url=""
+    _err "You didn't specify PowerDNS Mysql Port."
+    _err "Please set PDNS_Port and try again."
+    return 1
+  fi
+
+  if [ -z "$PDNS_User" ]; then
+    PDNS_User=""
+    _err "You didn't specify PowerDNS Mysql username."
+    _err "Please set PDNS_User and try again."
+    return 1
+  fi
+
+  if [ -z "$PDNS_Pass" ]; then
+    PDNS_Pass=""
+    _err "You didn't specify PowerDNS Mysql password."
+    _err "Please set PDNS_Pass and try again."
+    return 1
+  fi
+
+  if [ -z "$PDNS_Database" ]; then
+    PDNS_Database=""
+    _err "You didn't specify PowerDNS Mysql database."
+    _err "Please set PDNS_Database and try again."
+    return 1
+  fi
+
+  if [ -z "$PDNS_Ttl" ]; then
+    PDNS_Ttl="$DEFAULT_PDNS_TTL"
+  fi
+
+  #save the api addr and key to the account conf file.
+  _saveaccountconf PDNS_Host "$PDNS_Host"
+  _saveaccountconf PDNS_Port "$PDNS_Port"
+  _saveaccountconf PDNS_User "$PDNS_User"
+  _saveaccountconf PDNS_Pass "$PDNS_Pass"
+  _saveaccountconf PDNS_Database "$PDNS_Database"
+  
+  if [ "$PDNS_Ttl" != "$DEFAULT_PDNS_TTL" ]; then
+    _saveaccountconf PDNS_Ttl "$PDNS_Ttl"
+  fi
+
+  _debug "Detect root zone"
+  if ! _get_root "$fulldomain"; then
+    _err "invalid domain"
+    return 1
+  fi
+  _debug _domain "$_domain"
+
+  if ! set_record "$_domain" "$fulldomain" "$txtvalue"; then
+    return 1
+  fi
+
+  return 0
+}
+
+#fulldomain
+dns_pdnsMysql_rm() {
+  fulldomain=$1
+
+  _debug "Detect root zone"
+  if ! _get_root "$fulldomain"; then
+    _err "invalid domain"
+    return 1
+  fi
+  _debug _domain "$_domain"
+
+  if ! rm_record "$_domain" "$fulldomain"; then
+    return 1
+  fi
+
+  return 0
+}
+
+set_record() {
+  _info "Adding record"
+  root=$1
+  full=$2
+  txtvalue=$3
+  _domain_id=$(mysql -ss "-h${PDNS_Host}" "-P${PDNS_Port}" "-u${PDNS_User}" "-p${PDNS_Pass}" -e "SELECT id FROM ${PDNS_Database}.domains WHERE name='${root}'")
+  # insert challenge.
+  mysql -ss "-h${PDNS_Host}" "-P${PDNS_Port}" "-u${PDNS_User}" "-p${PDNS_Pass}" -e "INSERT INTO ${PDNS_Database}.records (domain_id,name, content, type,ttl,prio) VALUES \
+	  (${_domain_id},'${full}','${txtvalue}','TXT',60,NULL);"
+
+  if ! notify_slaves "$root"; then
+    return 1
+  fi
+
+  return 0
+}
+
+rm_record() {
+  _info "Remove record"
+  root=$1
+  full=$2
+
+  mysql -ss "-h${PDNS_Host}" "-P${PDNS_Port}" "-u${PDNS_User}" "-p${PDNS_Pass}" -e "DELETE FROM ${PDNS_Database}.records WHERE name='${full}' AND type='TXT';"
+
+  if ! notify_slaves "$root"; then
+    return 1
+  fi
+
+  return 0
+}
+
+notify_slaves() {
+  root=$1
+  # hack set last_check to null to force update. #
+  mysql -ss "-h${PDNS_Host}" "-P${PDNS_Port}" "-u${PDNS_User}" "-p${PDNS_Pass}" -e "UPDATE ${PDNS_Database}.domains SET last_check=NULL WHERE name='${root}';"
+
+  return 0
+}
+
+####################  Private functions below ##################################
+#_acme-challenge.www.domain.com
+#returns
+# _domain=domain.com
+_get_root() {
+  domain=$1
+  i=1
+  _pdns_domains=$(mysql -ss "-h${PDNS_Host}" "-P${PDNS_Port}" "-u${PDNS_User}" "-p${PDNS_Pass}" -e "SELECT name FROM ${PDNS_Database}.domains")
+  if [ -z "$_pdns_domains" ]; then
+    return 1
+  fi
+
+  while true; do
+    h=$(printf "%s" "$domain" | cut -d . -f $i-100)
+    if [ -z "$h" ]; then
+      return 1
+    fi
+
+    if _contains "$_pdns_domains" "$h"; then
+      _domain="$h"
+      return 0
+    fi
+
+    i=$(_math $i + 1)
+  done
+  _debug "$domain not found"
+
+  return 1
+}