AIProxySwift is a Swift package that wraps client libraries for over a dozen AI providers including OpenAI, Gemini, Anthropic, Stability AI, and Replicate. It can route requests directly to providers or through the AIProxy backend for added security via certificate pinning, split-key encryption, and per-user/ip rate limiting. The library integrates with iCloud key-value storage for cross-device rate limiting and supports BYOK use cases.