Ably: Elevated API Errors
Ably reported a major DDoS incident causing token-request errors across all Ably Realtime regions (503 responses) and intermittent ably.com unavailability. Recorded start: 2026-10-01 15:36 UTC; duration: 26 min, with token errors lasting approximately six minutes. Ably restored token-request service by increasing capacity and added targeted traffic-blocking and rate-limiting rules.
Machine-written from the archived incident (Sol). Check the timeline before relying on it.
Timeline of updates
- investigating
We're experiencing an elevated level of API errors and are currently looking into the issue.
- resolved
Between 15:30 UTC to 15:36 UTC there were elevated errors affecting token requests in all regions resulting in 503 error responses.
- postmortem
On October 1, a distributed denial-of-service \(DDoS\) attack caused elevated token-request errors across all Ably Realtime regions for approximately six minutes and intermittent unavailability of [ably.com](http://ably.com). We restored token-request service by increasing capacity and added targeted traffic-blocking and rate-limiting rules to mitigate the attack. We are strengthening endpoint protection and reviewing our firewall controls to reduce the risk of recurrence.
Rewindex changes for this incident
- Major incident: Elevated API Errors 2026-10-01 15:36 UTC
Impact, status and times are the vendor’s own, as last archived. View on stspg.io (opens in new tab). Ably profile · Recent Ably incidents · Markdown · JSON