Key. Base URL. First call.

curl https://api.sideren.io/v1/chat/completions \
  -H "authorization: Bearer $SIDEREN_API_KEY" \
  -H "content-type: application/json" \
  -d '{
    "model": "@sdn/gpt-oss-120b",
    "messages": [{ "role": "user", "content": "Say hello." }]
  }'

from openai import OpenAI

client = OpenAI(
    base_url="https://api.sideren.io/v1",
    api_key="sdn_your_key",
)

r = client.chat.completions.create(
    model="@sdn/gpt-oss-120b",
    messages=[{"role": "user", "content": "Say hello."}],
)
print(r.choices[0].message.content)

import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://api.sideren.io/v1",
  apiKey: process.env.SIDEREN_API_KEY,
});

const r = await client.chat.completions.create({
  model: "@sdn/gpt-oss-120b",
  messages: [{ role: "user", content: "Say hello." }],
});
console.log(r.choices[0].message.content);