Anthropic Vertex TypeScript API Library

This library provides convenient access to the Anthropic Vertex API.

For the non-Vertex Anthropic API at api.anthropic.com, see @anthropic-ai/sdk.

Installation

npm install @anthropic-ai/vertex-sdk

Usage

import { AnthropicVertex } from '@anthropic-ai/vertex-sdk';

// Reads from the `CLOUD_ML_REGION` & `ANTHROPIC_VERTEX_PROJECT_ID` environment variables.
// Additionally goes through the standard `google-auth-library` flow.
const client = new AnthropicVertex();

async function main() {
  const result = await client.messages.create({
    messages: [
      {
        role: 'user',
        content: 'Hey Claude!',
      },
    ],
    model: 'claude-3-5-sonnet-v2@20241022',
    max_tokens: 300,
  });
  console.log(JSON.stringify(result, null, 2));
}

main();

For more details on how to use the SDK, see the README.md for the main Anthropic SDK which this library extends.

Authentication

This library supports multiple authentication methods:

Default authentication

The client automatically uses the default Google Cloud authentication flow:

import { AnthropicVertex } from '@anthropic-ai/vertex-sdk';

// Uses default authentication and environment variables
const client = new AnthropicVertex({
  region: 'us-central1',
  projectId: 'my-project-id',
});

Custom GoogleAuth configuration

You can customize the authentication using the googleAuth option:

import { AnthropicVertex } from '@anthropic-ai/vertex-sdk';
import { GoogleAuth } from 'google-auth-library';

const client = new AnthropicVertex({
  googleAuth: new GoogleAuth({
    scopes: 'https://www.googleapis.com/auth/cloud-platform',
    keyFile: '/path/to/service-account.json',
  }),
  region: 'us-central1',
  projectId: 'my-project-id',
});

Pre-configured AuthClient

For advanced use cases like impersonation, you can provide a pre-configured AuthClient:

import { AnthropicVertex } from '@anthropic-ai/vertex-sdk';
import { GoogleAuth, Impersonated } from 'google-auth-library';

// Create an impersonated credential
const authClient = new Impersonated({
  sourceClient: await new GoogleAuth().getClient(),
  targetPrincipal: '[email protected]',
  lifetime: 30,
  delegates: [],
  targetScopes: ['https://www.googleapis.com/auth/cloud-platform'],
});

const client = new AnthropicVertex({
  authClient,
  region: 'us-central1',
  projectId: 'my-project-id',
});

Requirements

TypeScript >= 4.5 is supported.

The following runtimes are supported:

• Node.js 18 LTS or later (non-EOL) versions.
• Deno v1.28.0 or higher, using import { AnthropicVertex } from "npm:@anthropic-ai/vertex-sdk".
• Bun 1.0 or later.
• Cloudflare Workers.
• Vercel Edge Runtime.
• Jest 28 or greater with the "node" environment ("jsdom" is not supported at this time).
• Nitro v2.6 or greater.

Note that React Native is not supported at this time.

If you are interested in other runtime environments, please open or upvote an issue on GitHub.