如题：
可实现32个监测点来检查服务器的可用性情况。
对于外贸类站点的检测很有帮助。
同时，这个站点也提供网站在线率数据。可用率数据。注册后可观察你使用的虚拟主机服务器的在线率了。
属于第三方的监测工具。
一直想拥有一个类似的监测网站。提供给广大站长使用。
废话不多多。上网址：
http://host-tracker.com/check_res_ajx/2102254-0/

功能介绍如下示：

Main Features of the System

• Possibility to receive error notifications both to your Email, ICQ, GTalk or cell-phone via SMS;
• Possibility to receive specified (daily, weekly, monthly, quarterly, yearly) reports;
• Accumulation of availability statistics with further reporting;
• Resource accessibility instant check.
• Uptime button;
• Distributed monitoring;
• Instant site check;
• Monitoring period – every 1/5/15/30/60 minutes;
• The HEAD/POST/GET HTTP-methods support;
• Keyword presence control of a page;

http://host-tracker.com

附：收费细则：http://host-tracker.com/order-page/