Anthropic Fetch

A minimal and opinionated Anthropic API client built on top of ai-fetch.

anthropic-fetch provides a streamlined interface for interacting with Anthropic's AI models, leveraging the consistent and minimal approach of ai-fetch.

Key Features:

• Fast and small client that doesn't patch fetch
• Supports all environments with native fetch: Node 18+, browsers, Deno, Cloudflare Workers, etc
• Consistent interface aligned with other ai-fetch derived clients
• Focused on chat completions and embeddings for Anthropic models

Install

npm install anthropic-fetch

This package requires node >= 18 or an environment with fetch support.

This package exports ESM. If your project uses CommonJS, consider switching to ESM or use the dynamic import() function.

Usage

import { AnthropicClient } from 'anthropic-fetch';
const client = new AnthropicClient({
apiKey: 'your-api-key-here',
});
// Generate a chat completion
const response = await client.createChatCompletion({
model: 'claude-3-opus-20240229',
messages: [{ role: 'user', content: 'Hello, Claude!' }],
});
console.log(response.choices[0].message.content);

The apiKey is optional and will be read from process.env.OPENAI_API_KEY if present.

API

The Anthropic Fetch API implements the following ai-fetch interfaces

// Generate a single chat completion
client.createChatCompletion(params: ChatParams): Promise<ChatResponse>;

// Stream a single completion via a ReadableStream
client.streamChatCompletion(params: ChatStreamParams): Promise<ChatStreamResponse>;

Type Definitions

The type definitions are available through TSServer, and can be found in the source code.

Derived from AI Fetch

anthropic-fetch is built on top of ai-fetch

License

MIT © Dexa