Claude Agent SDK (TypeScript) on MagmaRouter

The TypeScript Claude Agent SDK starts the Claude Code binary under the hood, so it takes the same environment variables. There is no base-URL option on the SDK itself; you pass the environment through the query options.

Base URL: https://api.magmarouter.com
API key: Get one, starts sk-mr-
Example model: glm-5.3-xploded

Pass the environment through options.env

The SDK has no gateway-specific option. Its options.env replaces the child process environment, so spread process.env and add the Anthropic variables:

TypeScript

// npm install @anthropic-ai/claude-agent-sdk
import { query } from "@anthropic-ai/claude-agent-sdk";

for await (const message of query({
  prompt: "List the files in this repo",
  options: {
    env: {
      ...process.env,
      ANTHROPIC_BASE_URL: "https://api.magmarouter.com",
      ANTHROPIC_AUTH_TOKEN: process.env.MAGMAROUTER_API_KEY,
      ANTHROPIC_MODEL: "glm-5.3-xploded",
    },
  },
})) {
  console.log(message);
}

Set MAGMAROUTER_API_KEY in your own environment to a key from /chat. Every caveat from the Claude Code guide applies, including the tool-calling requirement.

Claude Agent SDK (TypeScript) on MagmaRouter

Pass the environment through options.env

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