diff --git a/dnsapi/dns_joker.sh b/dnsapi/dns_joker.sh
new file mode 100644
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+++ b/dnsapi/dns_joker.sh
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+#!/usr/bin/env sh
+
+# Joker.com API for acme.sh
+#
+# This script adds the necessary TXT record to a domain in Joker.com.
+#
+# You must activate Dynamic DNS in Joker.com DNS configuration first.
+# Username and password below refer to Dynamic DNS authentication,
+# not your Joker.com login credentials.
+# See: https://joker.com/faq/content/11/427/en/what-is-dynamic-dns-dyndns.html
+#
+# NOTE: This script does not support wildcard certificates, because
+# Joker.com API does not support adding two TXT records with the same
+# subdomain. Adding the second record will overwrite the first one.
+# See: https://joker.com/faq/content/6/496/en/let_s-encrypt-support.html
+#   "... this request will replace all TXT records for the specified
+#    label by the provided content"
+#
+# Author: aattww (https://github.com/aattww/)
+#
+# JOKER_USERNAME="xxxx"
+# JOKER_PASSWORD="xxxx"
+
+JOKER_API="https://svc.joker.com/nic/replace"
+
+########  Public functions #####################
+
+#Usage: dns_joker_add  _acme-challenge.www.domain.com   "XKrxpRBosdIKFzxW_CT3KLZNf6q0HG9i01zxXp5CPBs"
+dns_joker_add() {
+  fulldomain=$1
+  txtvalue=$2
+
+  JOKER_USERNAME="${JOKER_USERNAME:-$(_readaccountconf_mutable JOKER_USERNAME)}"
+  JOKER_PASSWORD="${JOKER_PASSWORD:-$(_readaccountconf_mutable JOKER_PASSWORD)}"
+
+  if [ -z "$JOKER_USERNAME" ] || [ -z "$JOKER_PASSWORD" ]; then
+    _err "No Joker.com username and password specified."
+    return 1
+  fi
+
+  _saveaccountconf_mutable JOKER_USERNAME "$JOKER_USERNAME"
+  _saveaccountconf_mutable JOKER_PASSWORD "$JOKER_PASSWORD"
+
+  if ! _get_root "$fulldomain"; then
+    _err "Invalid domain"
+    return 1
+  fi
+
+  _info "Adding TXT record"
+  if _joker_rest "username=$JOKER_USERNAME&password=$JOKER_PASSWORD&zone=$_domain&label=$_sub_domain&type=TXT&value=$txtvalue"; then
+    if _startswith "$response" "OK"; then
+      _info "Added, OK"
+      return 0
+    fi
+  fi
+  _err "Error adding TXT record."
+  return 1
+}
+
+#fulldomain txtvalue
+dns_joker_rm() {
+  fulldomain=$1
+  txtvalue=$2
+
+  JOKER_USERNAME="${JOKER_USERNAME:-$(_readaccountconf_mutable JOKER_USERNAME)}"
+  JOKER_PASSWORD="${JOKER_PASSWORD:-$(_readaccountconf_mutable JOKER_PASSWORD)}"
+
+  if ! _get_root "$fulldomain"; then
+    _err "Invalid domain"
+    return 1
+  fi
+
+  _info "Removing TXT record"
+  # TXT record is removed by setting its value to empty.
+  if _joker_rest "username=$JOKER_USERNAME&password=$JOKER_PASSWORD&zone=$_domain&label=$_sub_domain&type=TXT&value="; then
+    if _startswith "$response" "OK"; then
+      _info "Removed, OK"
+      return 0
+    fi
+  fi
+  _err "Error removing TXT record."
+  return 1
+}
+
+####################  Private functions below ##################################
+#_acme-challenge.www.domain.com
+#returns
+# _sub_domain=_acme-challenge.www
+# _domain=domain.com
+_get_root() {
+  fulldomain=$1
+  i=1
+  while true; do
+    h=$(printf "%s" "$fulldomain" | cut -d . -f $i-100)
+    _debug h "$h"
+    if [ -z "$h" ]; then
+      return 1
+    fi
+
+    # Try to remove a test record. With correct root domain, username and password this will return "OK: ..." regardless
+    # of record in question existing or not. 
+    if _joker_rest "username=$JOKER_USERNAME&password=$JOKER_PASSWORD&zone=$h&label=jokerTXTUpdateTest&type=TXT&value="; then
+      if _startswith "$response" "OK"; then
+        _sub_domain="$(echo "$fulldomain" | sed "s/\\.$h\$//")"
+        _domain=$h
+        return 0
+      fi
+    fi
+
+    i=$(_math "$i" + 1)
+  done
+
+  _debug "Root domain not found"
+  return 1
+}
+
+_joker_rest() {
+  data="$1"
+  _debug data "$data"
+
+  response="$(_post "$data" "$JOKER_API" "" "POST")"
+
+  if [ "$?" != "0" ]; then
+    _err "Error POSTing"
+    return 1
+  fi
+  _debug response "$response"
+  return 0
+}