In the timespan of 1 396 days starting March 16, 2021, cool.io was inspected for operability 5 times. Cool.io was reachable 5 times overall, according to the tests, with the most recent uptime occurring on November 20, 2022, receiving a code 200. None of the tests conducted as of January 10, 2025, found any instances of cool.io being unavailable. As of January 10, 2025, none of the received responses have shown any error status codes. Cool.io's 0.167 seconds response on November 20, 2022, differed from its average response time of 0.132 seconds.