diff --git a/README.md b/README.md
index 8a12d9f..4c46c92 100644
--- a/README.md
+++ b/README.md
@@ -315,6 +315,7 @@ You don't have to do anything manually!
 1. zonomi.com DNS API
 1. DreamHost.com API
 1. DirectAdmin API
+1. KingHost (https://www.kinghost.com.br/)
 
 
 And: 
@@ -331,6 +332,8 @@ For more details: [How to use DNS API](dnsapi)
 
 # 8. Use DNS manual mode:
 
+See: https://github.com/Neilpang/acme.sh/wiki/dns-manual-mode first.
+
 If your dns provider doesn't support any api access, you can add the txt record by your hand.
 
 ```bash
diff --git a/acme.sh b/acme.sh
index c1298c4..da8e60c 100755
--- a/acme.sh
+++ b/acme.sh
@@ -1806,6 +1806,7 @@ _send_signed_request() {
   MAX_REQUEST_RETRY_TIMES=5
   _request_retry_times=0
   while [ "${_request_retry_times}" -lt "$MAX_REQUEST_RETRY_TIMES" ]; do
+    _request_retry_times=$(_math "$_request_retry_times" + 1)
     _debug3 _request_retry_times "$_request_retry_times"
     if [ -z "$_CACHED_NONCE" ]; then
       _headers=""
@@ -1836,7 +1837,11 @@ _send_signed_request() {
     fi
     nonce="$_CACHED_NONCE"
     _debug2 nonce "$nonce"
-
+    if [ -z "$nonce" ]; then
+      _info "Could not get nonce, let's try again."
+      _sleep 2
+      continue
+    fi
     if [ "$ACME_VERSION" = "2" ]; then
       if [ "$url" = "$ACME_NEW_ACCOUNT" ] || [ "$url" = "$ACME_REVOKE_CERT" ]; then
         protected="$JWK_HEADERPLACE_PART1$nonce\", \"url\": \"${url}$JWK_HEADERPLACE_PART2, \"jwk\": $jwk"'}'
@@ -1894,7 +1899,6 @@ _send_signed_request() {
 
     if _contains "$_body" "JWS has invalid anti-replay nonce"; then
       _info "It seems the CA server is busy now, let's wait and retry."
-      _request_retry_times=$(_math "$_request_retry_times" + 1)
       _sleep 5
       continue
     fi
diff --git a/deploy/keychain.sh b/deploy/keychain.sh
index a99ed46..d86b4d0 100644
--- a/deploy/keychain.sh
+++ b/deploy/keychain.sh
@@ -1,11 +1,5 @@
 #!/usr/bin/env sh
 
-#Here is a sample custom api script.
-#This file name is "myapi.sh"
-#So, here must be a method   myapi_deploy()
-#Which will be called by acme.sh to deploy the cert
-#returns 0 means success, otherwise error.
-
 ########  Public functions #####################
 
 #domain keyfile certfile cafile fullchain
diff --git a/dnsapi/README.md b/dnsapi/README.md
index 8b4a835..e459094 100644
--- a/dnsapi/README.md
+++ b/dnsapi/README.md
@@ -325,6 +325,8 @@ The `CY_Username`, `CY_Password` and `CY_OTP_Secret` will be saved in `~/.acme.s
 
 ## 17. Use Domain-Offensive/Resellerinterface/Domainrobot API
 
+ATTENTION: You need to be a registered Reseller to be able to use the ResellerInterface. As a normal user you can not use this method.
+
 You will need your login credentials (Partner ID+Password) to the Resellerinterface, and export them before you run `acme.sh`:
 ```
 export DO_PID="KD-1234567"
@@ -525,8 +527,9 @@ For issues, please report to https://github.com/raidenii/acme.sh/issues.
 
 ## 28. Use Name.com API
 
-You'll need to fill out the form at https://www.name.com/reseller/apply to apply
-for API username and token.
+Create your API token here: https://www.name.com/account/settings/api
+
+Note: `Namecom_Username` should be your Name.com username and not the token name.  If you accidentally run the script with the token name as the username see `~/.acme.sh/account.conf` to fix the issue
 
 ```
 export Namecom_Username="testuser"
@@ -784,6 +787,17 @@ acme.sh --issue --dns dns_da -d example.com -d www.example.com
 
 The `DA_Api` and `DA_Api_Insecure` will be saved in `~/.acme.sh/account.conf` and will be reused when needed.
 
+## 42. Use KingHost DNS API
+
+API access must be enabled at https://painel.kinghost.com.br/painel.api.php
+
+```
+export KINGHOST_Username="yourusername"
+export KINGHOST_Password="yourpassword"
+acme.sh --issue --dns dns_kinghost -d example.com -d *.example.com
+```
+
+The `KINGHOST_username` and `KINGHOST_Password` will be saved in `~/.acme.sh/account.conf` and will be reused when needed.
 
 # Use custom API
 
diff --git a/dnsapi/dns_dnsimple.sh b/dnsapi/dns_dnsimple.sh
index 0bfe2b9..0dd3918 100644
--- a/dnsapi/dns_dnsimple.sh
+++ b/dnsapi/dns_dnsimple.sh
@@ -39,34 +39,17 @@ dns_dnsimple_add() {
 
   _get_records "$_account_id" "$_domain" "$_sub_domain"
 
-  if [ "$_records_count" = "0" ]; then
-    _info "Adding record"
-    if _dnsimple_rest POST "$_account_id/zones/$_domain/records" "{\"type\":\"TXT\",\"name\":\"$_sub_domain\",\"content\":\"$txtvalue\",\"ttl\":120}"; then
-      if printf -- "%s" "$response" | grep "\"name\":\"$_sub_domain\"" >/dev/null; then
-        _info "Added"
-        return 0
-      else
-        _err "Unexpected response while adding text record."
-        return 1
-      fi
-    fi
-    _err "Add txt record error."
-  else
-    _info "Updating record"
-    _extract_record_id "$_records" "$_sub_domain"
-
-    if _dnsimple_rest \
-      PATCH \
-      "$_account_id/zones/$_domain/records/$_record_id" \
-      "{\"type\":\"TXT\",\"name\":\"$_sub_domain\",\"content\":\"$txtvalue\",\"ttl\":120}"; then
-
-      _info "Updated!"
+  _info "Adding record"
+  if _dnsimple_rest POST "$_account_id/zones/$_domain/records" "{\"type\":\"TXT\",\"name\":\"$_sub_domain\",\"content\":\"$txtvalue\",\"ttl\":120}"; then
+    if printf -- "%s" "$response" | grep "\"name\":\"$_sub_domain\"" >/dev/null; then
+      _info "Added"
       return 0
+    else
+      _err "Unexpected response while adding text record."
+      return 1
     fi
-
-    _err "Update error"
-    return 1
   fi
+  _err "Add txt record error."
 }
 
 # fulldomain
@@ -84,19 +67,19 @@ dns_dnsimple_rm() {
   fi
 
   _get_records "$_account_id" "$_domain" "$_sub_domain"
-  _extract_record_id "$_records" "$_sub_domain"
 
+  _extract_record_id "$_records" "$_sub_domain"
   if [ "$_record_id" ]; then
-
-    if _dnsimple_rest DELETE "$_account_id/zones/$_domain/records/$_record_id"; then
-      _info "removed record" "$_record_id"
-      return 0
-    fi
+    echo "$_record_id" | while read -r item; do
+      if _dnsimple_rest DELETE "$_account_id/zones/$_domain/records/$item"; then
+        _info "removed record" "$item"
+        return 0
+      else
+        _err "failed to remove record" "$item"
+        return 1
+      fi
+    done
   fi
-
-  _err "failed to remove record" "$_record_id"
-  return 1
-
 }
 
 ####################  Private functions bellow ##################################
diff --git a/dnsapi/dns_he.sh b/dnsapi/dns_he.sh
index f42d56a..d196fbe 100755
--- a/dnsapi/dns_he.sh
+++ b/dnsapi/dns_he.sh
@@ -143,7 +143,7 @@ _find_zone() {
 
     _debug "Looking for zone \"${_attempted_zone}\""
 
-    line_num="$(echo "$_zone_names" | grep -n "$_attempted_zone" | cut -d : -f 1)"
+    line_num="$(echo "$_zone_names" | grep -n "^$_attempted_zone" | cut -d : -f 1)"
 
     if [ "$line_num" ]; then
       _zone_id=$(echo "$_zone_ids" | sed -n "${line_num}p")
diff --git a/dnsapi/dns_kinghost.sh b/dnsapi/dns_kinghost.sh
new file mode 100644
index 0000000..898ab28
--- /dev/null
+++ b/dnsapi/dns_kinghost.sh
@@ -0,0 +1,107 @@
+#!/usr/bin/env sh
+
+############################################################
+# KingHost API support                                     #
+# http://api.kinghost.net/doc/                             #
+#                                                          #
+# Author: Felipe Keller Braz <felipebraz@kinghost.com.br>  #
+# Report Bugs here: https://github.com/kinghost/acme.sh    #
+#                                                          #
+# Values to export:                                        #
+# export KINGHOST_Username="email@provider.com"            #
+# export KINGHOST_Password="xxxxxxxxxx"                    #
+############################################################
+
+KING_Api="https://api.kinghost.net/acme"
+
+# Usage: add  _acme-challenge.www.domain.com   "XKrxpRBosdIKFzxW_CT3KLZNf6q0HG9i01zxXp5CPBs"
+# Used to add txt record
+dns_kinghost_add() {
+  fulldomain=$1
+  txtvalue=$2
+
+  KINGHOST_Username="${KINGHOST_Username:-$(_readaccountconf_mutable KINGHOST_Username)}"
+  KINGHOST_Password="${KINGHOST_Password:-$(_readaccountconf_mutable KINGHOST_Password)}"
+  if [ -z "$KINGHOST_Username" ] || [ -z "$KINGHOST_Password" ]; then
+    KINGHOST_Username=""
+    KINGHOST_Password=""
+    _err "You don't specify KingHost api password and email yet."
+    _err "Please create you key and try again."
+    return 1
+  fi
+
+  #save the credentials to the account conf file.
+  _saveaccountconf_mutable KINGHOST_Username "$KINGHOST_Username"
+  _saveaccountconf_mutable KINGHOST_Password "$KINGHOST_Password"
+
+  _debug "Getting txt records"
+  _kinghost_rest GET "dns" "name=$fulldomain&content=$txtvalue"
+
+  #This API call returns "status":"ok" if dns record does not exists
+  #We are creating a new txt record here, so we expect the "ok" status
+  if ! echo "$response" | grep '"status":"ok"' >/dev/null; then
+    _err "Error"
+    _err "$response"
+    return 1
+  fi
+
+  _kinghost_rest POST "dns" "name=$fulldomain&content=$txtvalue"
+  if ! echo "$response" | grep '"status":"ok"' >/dev/null; then
+    _err "Error"
+    _err "$response"
+    return 1
+  fi
+
+  return 0
+}
+
+# Usage: fulldomain txtvalue
+# Used to remove the txt record after validation
+dns_kinghost_rm() {
+  fulldomain=$1
+  txtvalue=$2
+
+  KINGHOST_Password="${KINGHOST_Password:-$(_readaccountconf_mutable KINGHOST_Password)}"
+  KINGHOST_Username="${KINGHOST_Username:-$(_readaccountconf_mutable KINGHOST_Username)}"
+  if [ -z "$KINGHOST_Password" ] || [ -z "$KINGHOST_Username" ]; then
+    KINGHOST_Password=""
+    KINGHOST_Username=""
+    _err "You don't specify KingHost api key and email yet."
+    _err "Please create you key and try again."
+    return 1
+  fi
+
+  _kinghost_rest DELETE "dns" "name=$fulldomain&content=$txtvalue"
+  if ! echo "$response" | grep '"status":"ok"' >/dev/null; then
+    _err "Error"
+    _err "$response"
+    return 1
+  fi
+
+  return 0
+}
+
+####################  Private functions below ##################################
+_kinghost_rest() {
+  method=$1
+  uri="$2"
+  data="$3"
+  _debug "$uri"
+
+  export _H1="X-Auth-Email: $KINGHOST_Username"
+  export _H2="X-Auth-Key: $KINGHOST_Password"
+
+  if [ "$method" != "GET" ]; then
+    _debug data "$data"
+    response="$(_post "$data" "$KING_Api/$uri.json" "" "$method")"
+  else
+    response="$(_get "$KING_Api/$uri.json?$data")"
+  fi
+
+  if [ "$?" != "0" ]; then
+    _err "error $uri"
+    return 1
+  fi
+  _debug2 response "$response"
+  return 0
+}