Playground

Chat with any OpenAI-compatible or Anthropic Messages endpoint — an App Server endpoint you just created or an external provider — straight from the browser.

API format

Posts to /chat/completions.

Base URL

API keyNo API key (open endpoint)

Requests go straight from your browser to the endpoint. The key is kept in memory only and never stored.

Model

Temperature: 0.70Max tokensThinking

System prompt

Compare with google/gemini-3-flash-preview

import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://<slug>.arkor.app/v1",
  apiKey: "YOUR_API_KEY",
});

const stream = await client.chat.completions.create({
  model: "<model>",
  messages: [
    { role: "user", content: "Hello!" },
  ],
  temperature: 0.7,
  max_tokens: 512,
  stream: true,
});

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

Your endpoint

Configure an endpoint and send a message.