The goal of this library is to use React Native SSE instead of polyfills to support calling the Anthropic API directly from React Native with streaming. The package uses the same types and API as the Anthropic Node SDK wherever possible.
Caution
You should never expose any secrets in the bundle of a web or mobile app. The correct usage of this client package is with a backend that proxies the Anthropic call while making sure access is secured. The baseURL parameter for this Anthropic client is thus mandatory. If you set the baseURL to https://api.anthropic.com/v1, you are basically exposing your Anthropic API key on the internet! This example in this repo uses Backmesh.
If you would like to contribute or request a feature, please join our Discord and ask questions in the #oss channel or create a pull request or issue.
Install the package
npm i anthropic-react-nativeAnd then instantiate the client:
import Anthropic from 'anthropic-react-native';
const client = new Anthropic({
baseURL:
'https://edge.backmesh.com/v1/proxy/PyHU4LvcdsQ4gm2xeniAFhMyuDl2/yWo35DdTROVMT52N0qs4/',
// The backmesh proxy uses your auth provider's JWT to authorize access
apiKey: supabase.auth.session().access_token,
});The streaming APIs uses an EventSource from react-native-sse under the hood to provide a required typed event callbacks for each of the Anthropic API Types.
client.messages.stream(
{
model: 'claude-3-5-sonnet-20240620',
messages: [{ role: 'user', content: userInput }],
max_tokens: 1024,
},
{
onError: (error) => {
console.error('SSE Error:', error); // Handle any errors here
},
onMessageStart: () => {
setUserInput('');
},
onContentBlockDelta: (ev: ContentBlockDeltaEvent) => {
if (ev.delta.type === 'text_delta')
setText((prevText) => prevText + (ev.delta as TextDelta).text);
},
onMessageStop: () => {
console.log('SSE connection for completion closed.'); // Handle when the connection is opened
},
}
);Check the example for more details
MIT