Node.js SDK

npm install openai

import OpenAI from "openai";
 
const client = new OpenAI({
  baseURL: "https://api.foza.ai/v1",
  apiKey: "sk-foza-xxxxx",
});
 
const response = await client.chat.completions.create({
  model: "openai/gpt-4o",
  messages: [
    { role: "system", content: "You are a helpful assistant." },
    { role: "user", content: "What is the capital of France?" },
  ],
});
 
console.log(response.choices[0].message.content);

const stream = await client.chat.completions.create({
  model: "anthropic/claude-sonnet-4.6",
  messages: [{ role: "user", content: "Tell me a story" }],
  stream: true,
});
 
for await (const chunk of stream) {
  const content = chunk.choices[0]?.delta?.content;
  if (content) process.stdout.write(content);
}