diff --git a/notify/matrix.sh b/notify/matrix.sh
new file mode 100644
index 00000000..cd8e0366
--- /dev/null
+++ b/notify/matrix.sh
@@ -0,0 +1,71 @@
+#!/usr/bin/env sh
+
+#Support Matrix API
+
+#MATRIX_SERVER_URL=""
+#MATRIX_API_TOKEN=""
+#MATRIX_ROOM_ID=""
+
+matrix_send() {
+  _subject="$1"
+  _content="$2"
+  _statusCode="$3" #0: success, 1: error 2($RENEW_SKIP): skipped
+  _debug "_statusCode" "$_statusCode"
+
+  MATRIX_SERVER_URL="${MATRIX_SERVER_URL:-$(_readaccountconf_mutable MATRIX_SERVER_URL)}"
+  if [ -z "$MATRIX_SERVER_URL" ]; then
+    MATRIX_SERVER_URL=""
+    _err "You didn't specify a Matrix homeserver URL MATRIX_SERVER_URL yet."
+    return 1
+  fi
+  _saveaccountconf_mutable MATRIX_SERVER_URL "$MATRIX_SERVER_URL"
+
+  MATRIX_API_TOKEN="${MATRIX_API_TOKEN:-$(_readaccountconf_mutable MATRIX_API_TOKEN)}"
+  if [ -z "$MATRIX_API_TOKEN" ]; then
+    MATRIX_API_TOKEN=""
+    _err "You didn't specify a Matrix private token MATRIX_API_TOKEN yet."
+    return 1
+  fi
+  _saveaccountconf_mutable MATRIX_API_TOKEN "$MATRIX_API_TOKEN"
+
+  MATRIX_ROOM_ID="${MATRIX_ROOM_ID:-$(_readaccountconf_mutable MATRIX_ROOM_ID)}"
+  if [ -z "$MATRIX_ROOM_ID" ]; then
+    MATRIX_ROOM_ID=""
+    _err "You didn't specify a Matrix room ID MATRIX_ROOM_ID yet."
+    return 1
+  fi
+  _saveaccountconf_mutable MATRIX_ROOM_ID "$MATRIX_ROOM_ID"
+
+  _h1="$_H1"
+  _h2="$_H2"
+  _h3="$_H3"
+  _h4="$_H4"
+  _h5="$_H5"
+
+  _H1="Accept: application/json"
+  _H2="Content-Type: application/json"
+  _H3="Authorization: Bearer $MATRIX_API_TOKEN"
+  unset _H4
+  unset _H5
+
+  _content="$(printf "*%s*\n%s" "$_subject" "$_content" | _json_encode)"
+  _data="{\"msgtype\": \"m.text\", \"body\": \"$_content\"}"
+
+  _post "$_data" "$MATRIX_SERVER_URL/_matrix/client/r0/rooms/$MATRIX_ROOM_ID/send/m.room.message"
+
+  _H1="$_h1"
+  _H2="$_h2"
+  _H3="$_h3"
+  _H4="$_h4"
+  _H5="$_h5"
+
+  # shellcheck disable=SC2154
+  if _contains "$response" "event_id"; then
+    _info "matrix send success."
+    return 0
+  fi
+
+  _err "matrix send error."
+  _err "$response"
+  return 1
+}