OpenAI SDK baseURL for Virouter

Use this base URL

Keep your API key in a server-side environment variable such as VIROUTER_API_KEY. Never expose it in frontend code.

Node.js example

Use the standard OpenAI package and change only the API key and baseURL.

import OpenAI from "openai";

const client = new OpenAI({
  apiKey: process.env.VIROUTER_API_KEY,
  baseURL: "https://api.virouter.com/v1",
});

const response = await client.chat.completions.create({
  model: "gpt-5.5",
  messages: [{ role: "user", content: "Hello from Virouter" }],
});

console.log(response.choices[0]?.message?.content);

Python example

The Python SDK uses base_url.

import os
from openai import OpenAI

client = OpenAI(
    api_key=os.environ["VIROUTER_API_KEY"],
    base_url="https://api.virouter.com/v1",
)

response = client.chat.completions.create(
    model="claude-sonnet-4-6",
    messages=[{"role": "user", "content": "Summarize this in one paragraph."}],
)

print(response.choices[0].message.content)

cURL smoke test

Use cURL to confirm the endpoint, key, and model id before wiring the SDK into your app.

curl https://api.virouter.com/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $VIROUTER_API_KEY" \
  -d '{
    "model": "gpt-5.5",
    "messages": [{"role":"user","content":"Say ok"}]
  }'

Switching from GPT to Claude

Keep the same client and request shape. Change the model value to a Claude id and Virouter routes the request to Anthropic.

await client.chat.completions.create({
  model: "claude-opus-4-7",
  messages: [{ role: "user", content: "Review this design." }],
});

Troubleshooting