I recently published a new package on npm that brings the Anthropic APIs to React Native without polyfills.

https://github.com/backmesh/anthropic-react-native

Today the library supports chat streaming, normal chat completions and file upload with more endpoints coming soon. The goal of the library is to follow the Node SDK wherever possible while taking advantage of React Native SSE for streaming where the Anthropic Node SDK does not work. Lmk what you think or if this will be useful to you!