OpenRouter API

OpenRouter provides a unified API to access 400+ models from 70+ providers (OpenAI, Anthropic, Google, Meta, Mistral, etc.) through a single OpenAI-compatible interface.

Quick Start

// Using fetch
const response = await fetch("https://openrouter.ai/api/v1/chat/completions", {
  method: "POST",
  headers: {
    "Authorization": `Bearer ${OPENROUTER_API_KEY}`,
    "Content-Type": "application/json"
  },
  body: JSON.stringify({
    model: "openai/gpt-5.2",
    messages: [{ role: "user", content: "Hello!" }]
  })
});