Quickstart

UnoRouter puts 200+ models from OpenAI, Anthropic, Google, DeepSeek, Qwen and 50+ other providers behind one OpenAI-compatible endpoint. Integrate once, then swap models by changing a single string. Many models are completely free, no credit card required.

You can also skip the API entirely: the built-in chat runs free models without signup, and your conversations stay in your browser.

Point any OpenAI-compatible client at these two values:

Tools that speak a native wire protocol use the bare domain instead: Claude Code sets ANTHROPIC_BASE_URL and Gemini CLI sets GOOGLE_GEMINI_BASE_URL without the /v1 suffix. Each integration guide shows the exact value.

Sign up, then open the Tokens page and create a key. Give it a name; you can also set an expiry date, a spending limit, allowed models and an IP allowlist. The key is shown once, store it safely.

Without a key you can still use the built-in chat as a guest on free models. API requests always need a key.

Replace YOUR_API_KEY with the key you just created (if you are logged in, it is already filled in below):

curl https://api.unorouter.com/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
    "model": "gpt-oss-120b:free",
    "messages": [{ "role": "user", "content": "Hello!" }]
  }'

Models with the :free suffix cost nothing. Pick any other model from the catalog to use your balance.

Any OpenAI SDK works unchanged, just set the base URL and your key:

from openai import OpenAI

client = OpenAI(
    base_url="https://api.unorouter.com/v1",
    api_key="YOUR_API_KEY",
)

completion = client.chat.completions.create(
    model="gpt-oss-120b:free",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(completion.choices[0].message.content)

import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://api.unorouter.com/v1",
  apiKey: "YOUR_API_KEY",
});

const completion = await client.chat.completions.create({
  model: "gpt-oss-120b:free",
  messages: [{ role: "user", content: "Hello!" }],
});
console.log(completion.choices[0].message.content);

The Integrations tab has copy-paste setup for 30+ apps: SillyTavern, JanitorAI, Claude Code, Cline and more. The Chat tab documents the built-in roleplay chat.

Browse all models and live prices on the Models page, community-tested free-model reliability on Rankings, and provider health on Status.