Anthropic engineers resolved a service disruption that prevented users from logging into Claude.ai and several integrated tools on Sunday afternoon. The outage caused elevated error rates during the authentication process for approximately 48 minutes.
The incident began at 15:31 UTC. According to the company's official status page, the disruption lasted until 16:19 UTC.
The technical issue primarily affected the login process. Users attempting to access the platform encountered persistent errors when trying to authenticate their accounts.
Scope of Disruption
The disruption impacted a wide range of Anthropic's AI-driven products and developer tools. The Claude API (api.anthropic.com) experienced the same elevated error rates as the primary web interface.
Other affected services included Claude Code and Claude Cowork. The company also reported issues with Claude for Government and platform.claude.com, which was formerly known as console.anthropic.com.
Anthropic began investigating the issue at 15:40 UTC. The company's status page indicated that engineers identified the cause shortly thereafter.
The company provided a sequence of updates as the situation progressed. At 15:58 UTC, Anthropic reported that they were continuing to investigate elevated errors specifically affecting the login process.
"We have identified the issue affecting Claude.ai and Claude Code logins," the company stated in an update at 16:16 UTC. The company noted that staff were working to apply a fix.
The outage concluded at 16:19 UTC. The company officially confirmed the resolution and posted a final update at 16:35 UTC.
