Over the previous 1 559 day period beginning on August 29, 2021, there were 7 checks done on customs.gov.sg's availability. From tests, customs.gov.sg had 6 instances of uptime, the most recent of which occurred on January 8, 2025, with a 200 code. 14.29% of evaluations performed resulted in customs.gov.sg being unavailable, occurring 1 times, with October 26, 2025, being the most recent instance. As of December 6, 2025, no error responses had been noted in the replies that were received. On October 26, 2025, customs.gov.sg responded in — seconds, which contrasted with its average response time of 1.259 seconds.