Anthropic SDK

The Anthropic SDKs work against Cloakray's Messages endpoint. Set the base URL to https://api.cloakray.com — without /v1, which the SDK adds — and use an Cloakray key.

TypeScript

npm install @anthropic-ai/sdk

import Anthropic from "@anthropic-ai/sdk";

const client = new Anthropic({
  baseURL: "https://api.cloakray.com",
  apiKey: process.env.CLOAKRAY_API_KEY,
});

const message = await client.messages.create({
  model: "claude-opus-4-8",
  max_tokens: 1024,
  messages: [{ role: "user", content: "Hello, Claude" }],
});

Python

pip install anthropic

import os
import anthropic

client = anthropic.Anthropic(base_url="https://api.cloakray.com", api_key=os.environ["CLOAKRAY_API_KEY"])

message = client.messages.create(
    model="claude-opus-4-8",
    max_tokens=1024,
    messages=[{"role": "user", "content": "Hello, Claude"}],
)

Without changing code

The SDKs read ANTHROPIC_BASE_URL and ANTHROPIC_API_KEY:

export ANTHROPIC_BASE_URL="https://api.cloakray.com"
export ANTHROPIC_API_KEY="ckr_..."

What works

messages.create and messages.stream, with tools, images, PDFs, extended thinking and prompt caching — see Anthropic Messages. The model can be any text model in the catalogue, not only Claude.

Token counting, the Message Batches API, the Files API and the Admin API are not offered.