Not at all. When we monitor your site we are exactly like a regular user taking a look around your website once every few minutes. We access the pages you have given us and take detailed notes about what we see. This information is then gathered together into a report for you about your up and down time.
Normal websites are designed to withstand thousands of users visiting them every minute. If for some reason you encounter problems from the traffic our checking causes then your web host or server may be having serious problems. You should email us at firstname.lastname@example.org or use our online contact form immediately so we can solve the problem.