OpenAI SDK
OpenAI Node.js SDK はそのまま使用できます。インストール
- npm
- yarn
- pnpm
npm install openai
yarn add openai
pnpm add openai
基本的な使い方
import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://api.arouter.ai/v1",
apiKey: "lr_live_xxxx",
});
const response = await client.chat.completions.create({
model: "openai/gpt-5.4",
messages: [{ role: "user", content: "Hello!" }],
});
console.log(response.choices[0].message.content);
マルチプロバイダー
// OpenAI SDK 経由で Anthropic を使用
const response = await client.chat.completions.create({
model: "anthropic/claude-sonnet-4.6",
messages: [{ role: "user", content: "Hello!" }],
});
// OpenAI SDK 経由で DeepSeek を使用
const response = await client.chat.completions.create({
model: "deepseek/deepseek-v3.2",
messages: [{ role: "user", content: "Hello!" }],
});
ストリーミング
const stream = await client.chat.completions.create({
model: "openai/gpt-5.4",
messages: [{ role: "user", content: "詩を書いてください。" }],
stream: true,
});
for await (const chunk of stream) {
const content = chunk.choices[0]?.delta?.content;
if (content) process.stdout.write(content);
}
Anthropic SDK
Anthropic Node.js SDK はそのまま使用できます。インストール
- npm
- yarn
- pnpm
npm install @anthropic-ai/sdk
yarn add @anthropic-ai/sdk
pnpm add @anthropic-ai/sdk
基本的な使い方
import Anthropic from "@anthropic-ai/sdk";
const client = new Anthropic({
baseURL: "https://api.arouter.ai",
apiKey: "lr_live_xxxx",
});
const message = await client.messages.create({
model: "claude-sonnet-4.6",
max_tokens: 1024,
messages: [{ role: "user", content: "Hello!" }],
});
console.log(message.content[0].text);
ストリーミング
const stream = client.messages.stream({
model: "claude-sonnet-4.6",
max_tokens: 1024,
messages: [{ role: "user", content: "物語を話してください。" }],
});
for await (const event of stream) {
if (event.type === "content_block_delta" && event.delta.type === "text_delta") {
process.stdout.write(event.delta.text);
}
}
ARouter SDK
ファーストパーティの@arouter/sdk は key 管理や使用量追跡などの追加機能を提供します。
インストール
- npm
- yarn
- pnpm
npm install @arouter/sdk
yarn add @arouter/sdk
pnpm add @arouter/sdk
チャット補完
import { ARouter } from "@arouter/sdk";
const router = new ARouter({
apiKey: "lr_live_xxxx",
baseURL: "https://api.arouter.ai",
});
const response = await router.chatCompletion({
model: "openai/gpt-5.4",
messages: [{ role: "user", content: "Hello!" }],
});
console.log(response.choices[0].message.content);
ストリーミング
const stream = await router.chatCompletionStream({
model: "openai/gpt-5.4",
messages: [{ role: "user", content: "俳句を書いてください。" }],
});
for await (const chunk of stream) {
const content = chunk.choices[0]?.delta?.content;
if (content) process.stdout.write(content);
}
key 管理
管理キー（lr_mgmt_）を使用して API key を作成・管理します。
const mgmt = new ARouter({
apiKey: "lr_mgmt_xxxx",
baseURL: "https://api.arouter.ai",
});
const key = await mgmt.createKey({
name: "backend-service",
allowed_providers: ["openai", "anthropic"],
limit: 150,
limit_reset: "monthly",
});
console.log("API Key:", key.key);
const keys = await mgmt.listKeys();
console.log("Keys:", keys.data);
await mgmt.updateKey(key.data.hash, { disabled: true });
await mgmt.deleteKey(key.data.hash);
ウォレット JWT + x402 支払い
暗号ウォレットを持つ AI エージェントは SIWx で認証し、x402 でクレジットを支払えます。 SDK はウォレット JWT をキャッシュし、以降のリクエストの Bearer token として使用します。EVM（Base）
import { ARouter, withX402EvmPayment } from "@arouter/sdk";
import { privateKeyToAccount } from "viem/accounts";
const signer = privateKeyToAccount(process.env.EVM_PRIVATE_KEY as `0x${string}`);
const client = withX402EvmPayment(
new ARouter({ baseURL: "https://api.arouter.ai", apiKey: "" }),
signer,
);
const response = await client.chatCompletion({
model: "openai/gpt-5.4",
messages: [{ role: "user", content: "Hello" }],
});
Solana
import { ARouter, withX402SolanaPayment } from "@arouter/sdk";
const client = withX402SolanaPayment(
new ARouter({ baseURL: "https://api.arouter.ai", apiKey: "" }),
solanaSigner,
{ address: solanaAddress, signMessage: (msg) => signEd25519(msg) },
);
SIWx のみ（自動支払いなし）
import { ARouter, withSIWxAuth } from "@arouter/sdk";
const client = await withSIWxAuth(
new ARouter({ baseURL: "https://api.arouter.ai", apiKey: "" }),
{ address: "0xYourAddress", signMessage: (msg) => signer.signMessage({ message: msg }) },
);