[Bug] Native app clients blocked by Cloudflare TLS fingerprinting on KBP datacenter

Bug Description
My wifi blocks Claude on my iOS and Android, macOS desktop apps. It says "Something went wrong" Here's a research: So the browser works but the apps don't — that narrows it down. Cloudflare is specifically blocking the native app HTTP clients while letting browsers through. This happens because: - Cloudflare uses TLS fingerprinting (JA3/JA4) to distinguish browsers from other clients - The native apps (iOS/Android/macOS) have a different TLS fingerprint and User-Agent than a browser - Cloudflare's rules at the KBP datacenter are flagging those as suspicious and issuing a challenge the apps can't solve You can't fix this on your end — it's a Cloudflare configuration issue on Anthropic's side. Workarounds: - VPN — routes you through a different Cloudflare datacenter with less aggressive rules - Mobile data — different IP, different datacenter To get it actually fixed: Report it to Anthropic support with these details: - cf-ray: 9f4027cac8132d30-KBP …
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