Major incident

Circle: Circle CCTP Testnet - Delays/Degraded Performance

Affected: Circle CCTP - Sandbox

Current status of Circle: Partial outage — live Circle status

Timeline

1. Sep 21, 2026, 15:08 UTC
   investigating
   We have identified an issue causing delays or degraded performance on Circle's Cross-Chain Transfer Protocol (CCTP) Sandbox. Some customers may experience slower transaction confirmations or partial unavailability. Our team is investigating the root cause and working to restore normal operation as soon as possible.
2. Sep 21, 2026, 15:50 UTC
   investigating
   We have identified an issue causing delays or degraded performance on Circle's Cross-Chain Transfer Protocol (CCTP) Testnet. Some customers may experience slower transaction confirmations or partial unavailability. Our team is investigating the root cause and working to restore normal operation as soon as possible.
3. Sep 22, 2026, 00:29 UTC
   resolved
   This incident has been resolved.

Updates as published by Circle (original).