Agent SDK

Run the Claude Agent SDK on any model

query() already reads ANTHROPIC_BASE_URL and ANTHROPIC_API_KEY. Point both at AnyRouter — no SDK fork.

The problem

What this is for

The Agent SDK is built for Anthropic's /messages API. Teams still want GPT, GLM, Llama, or a failover preset without rewriting the loop.

What to do

Three steps, then copy

1.Install @anthropic-ai/claude-agent-sdk.
2.Set ANTHROPIC_BASE_URL to https://anyrouter.dev/api and ANTHROPIC_API_KEY to your sk-ar key.
3.Pass model: "anyrouter/auto" (or any catalog id) in query() options.

query()

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

for await (const message of query({
  prompt: "List the files here and summarize the project.",
  options: {
    model: "anyrouter/auto",
    env: {
      ...process.env,
      ANTHROPIC_BASE_URL: "https://anyrouter.dev/api",
      ANTHROPIC_API_KEY: process.env.ANYROUTER_API_KEY ?? "",
    },
  },
})) {
  if (message.type === "result") console.log(message.result)
}

Ready to try it

The guide has the full walkthrough. Sign up if you still need a key.

Read the Agent SDK guide Start free

Run Claude Code through AnyRouter

Install the anyr CLI, then anyr claude — it injects the base URL, key, and model. Env vars are the fallback if you already run claude yourself.

Open

One AI SDK provider for the whole catalog

Install @anyr/ai-sdk-provider. generateText and streamText take a catalog id — including anyrouter/free.

Open

Keep the OpenAI SDK, change two fields

Override baseURL and apiKey. Model ids are owner/model strings across 209+ models.

Open