Add.ac was checked for uptime 5 times over 2 085 days beginning March 21, 2019, according to reports. The website add.ac returned a 200 ok response in 5 out of all tests conducted, proving operational on the last check on August 2, 2024. As of December 4, 2024, inspections revealed no instances of add.ac being unavailable. As of December 4, 2024, all received replies have confirmed that there are no errors in the responses. On August 2, 2024, add.ac's response time contrasted its average, being 2.544 seconds against 3.863 seconds.