OpenRouter TypeScript Client

A production-ready TypeScript client library for the OpenRouter API. This library provides comprehensive access to multiple AI models through OpenRouter's unified interface with full TypeScript support, streaming, error handling, and developer-friendly utilities.

Features

• ✅ Full TypeScript Support - Complete type definitions for all endpoints and parameters
• ✅ Streaming Support - Real-time streaming responses with async iterators
• ✅ Error Handling - Comprehensive error classes with proper categorization
• ✅ Retry Logic - Configurable exponential backoff for network resilience
• ✅ Tool Calling - Full support for function calling across providers
• ✅ Input Validation - Parameter validation with helpful error messages
• ✅ Helper Utilities - Builder patterns and convenience functions
• ✅ Request Cancellation - AbortController support for canceling requests
• ✅ Rate Limit Handling - Automatic retry with proper rate limit respect
• ✅ Multimodal Support - Text and image inputs for compatible models

Installation

npm install @openrouter/typescript-client

Quick Start

import { OpenRouterClient, MODELS } from '@openrouter/typescript-client';

const client = new OpenRouterClient({
  apiKey: process.env.OPENROUTER_API_KEY!,
  siteUrl: 'https://yoursite.com', // Optional: for rankings
  siteName: 'Your App Name'        // Optional: for rankings
});

// Basic chat completion
const response = await client.chat.completions.create({
  model: MODELS.GPT_4O,
  messages: [
    { role: 'user', content: 'Hello! How are you?' }
  ]
});

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

License

MIT License. See LICENSE for details.