The data indicates polyfill.io was inspected for availability 34 times in the 1 979 days following January 31, 2021. 13 times polyfill.io was accessible from total checks attempted, with the latest uptime on September 26, 2022, returning a 200 code. 58.82% of checks resulted in polyfill.io being inaccessible, occurring 20 times total, most recently on April 15, 2026. The most recent error observed among the 1 responses with errors was on June 19, 2026, coded as 401. According to records, polyfill.io responded in 0.263 seconds on June 19, 2026, compared to an average of 0.091 seconds.