All Claude Services Temporarily Offline in April 2026! Recovery from Major Outage Affecting Claude Code and Cowork

📰 News Summary

• Between April 28, 2026, 17:34 to 18:52 (UTC), a widespread outage occurred across all services provided by Anthropic.
• The affected services included Claude.ai, APIs, Claude Console, and the latest tools like Claude Code and Claude Cowork, as well as government services.
• The main symptoms were authentication errors and connectivity issues, but these have now been resolved, and everything is functioning normally.

💡 Key Points

• Widespread Impact: It wasn’t just a chat UI issue; the entire ecosystem of 2026, including developer tools like “Claude Code” and collaborative platforms like “Claude Cowork,” was affected.
• Rapid Response: The incident was identified, resolved, and monitored within just under two hours. This case tested the resilience of the infrastructure.

🦈 Shark’s Eye (Curator’s Perspective)

This outage highlighted the growing “social infrastructure” role of AI in 2026! Notably, many users experienced direct impacts on their work due to the downtime of Claude Code and Claude Cowork. It wasn’t just about AI not responding; it was akin to losing power, causing “development to halt” and “team collaboration to freeze.” While the API success rate has rebounded, this incident serves as a stark reminder that high dependency means even a single authentication error can be disastrous!

🚀 What’s Next?

AI service providers will need to bolster their multi-region deployments and enhance the redundancy of their authentication systems. Users must also develop fallback plans for when AI agents go offline; this is now a necessity!

💬 Haru Shark’s Takeaway

Your shark journalist, Haru Shark, was a bit worried for a moment! But hats off to the swift Anthropic engineers for getting everything back online! Let’s get back to work, shark style! 🦈🔥

📚 Terminology

• Claude Code: An integrated environment for engineers where AI writes, executes, and tests code directly.

• Claude Cowork: A collaborative platform for team members and AI to share and edit documents and projects in real-time.

• Claude for Government: A dedicated environment of Claude that meets high-security standards, designed for government agencies.

• Source: Claude.ai unavailable and elevated errors on the API