Node.js SDK

npm install fallbakit

import { Fallbakit } from "fallbakit";

const apiKey = process.env.FALLBAKIT_API_KEY;
if (!apiKey) throw new Error("FALLBAKIT_API_KEY is required");

const client = new Fallbakit({
  apiKey,
  baseURL: process.env.FALLBAKIT_BASE_URL ?? "https://api.fallbakit.com",
  timeout: 30_000,
});

const response = await client.chat.completions.create({
  model: "llama3.2",
  messages: [{ role: "user", content: "Write a short welcome message" }],
  fallbackProvider: "openai",
  fallbackModel: "gpt-4o-mini",
  fallback: true,
});

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

const stream = await client.chat.completions.create({
  model: "llama3.2",
  messages: [{ role: "user", content: "Stream one sentence" }],
  stream: true,
});

for await (const chunk of stream) {
  process.stdout.write(chunk.choices[0]?.delta?.content ?? "");
}