🌉 Bridge AI SDK

Bridge AI is a unified, type-safe SDK for interacting with multiple AI providers (OpenAI, Gemini, Claude, Perplexity, and DeepSeek). Designed with the elegance and modularity of AWS SDK v3, it provides a seamless interface whether you're building a simple bot or a complex multi-model application.

✨ Features

• 🎯 Unified Interface: One SDK to rule them all. Switch providers by changing a single config line.
• 🌊 Real-time Streaming: Unified AsyncIterable stream support across all providers.
• 🏗️ AWS SDK v3 Inspired: Familiar Client-Command pattern for modularity.
• 🛡️ Structured Output: Built-in support for JSON mode and Schema validation.
• 🧠 Agentic Nature: Native support for tools (function calling) and smart memory.
• 🖼️ Multimodal: Unified interface for vision-based prompts.
• 💰 Cost Auditing: Automatic token tracking and cost estimation per request.
• ⚡ TOON Compression: Save up to 40% on tokens by using TOON for structured data.
• 🔄 Heavy Duty: Built-in retries with exponential backoff and provider fallbacks.

🚀 Installation

npm install bridge-ai

🛠️ Quick Start

1. Set up your Environment Variables

OPENAI_API_KEY=sk-...
GEMINI_API_KEY=...
ANTHROPIC_API_KEY=...

2. Basic Usage

import { BridgeAIClient } from 'bridge-ai';

const client = new BridgeAIClient({ provider: 'openai' });

const response = await client.chat({ 
  prompt: 'What is the future of AI?' 
});

console.log(response.text);
console.log(`Cost: $${response.cost}`); // $0.00004

🧠 Advanced Features

🌊 Unified Streaming

Get real-time responses with a single unified interface.

const stream = client.chatStream({ prompt: 'Write a long story...' });

for await (const chunk of stream) {
  process.stdout.write(chunk.text);
}

🛡️ Structured Output (JSON Mode)

Force the model to return valid JSON.

const res = await client.chat({
  prompt: 'List 3 fruits',
  responseFormat: 'json'
});
console.log(res.json); // [{name: "Apple"}, ...]

🖼️ Vision (Multimodal)

Send images to any supported model consistently.

const res = await client.chat({
  prompt: 'What is inside this image?',
  images: [{ 
    type: 'url', 
    data: 'https://example.com/photo.jpg' 
  }]
});

🔄 Fallbacks & Retries

Ensure 100% uptime by defining fallbacks. Bridge AI also automatically retries on rate limits (429) or server errors.

const client = new BridgeAIClient({
  provider: 'openai',
  fallbackProviders: ['gemini', 'claude'],
  retryOptions: { retries: 3 }
});

⚡ TOON Token Compression

Bridge AI is the first SDK to natively support TOON (Token-Oriented Object Notation). Use it to send complex structured data (like large arrays or objects) while saving up to 40% on token costs compared to JSON.

const res = await client.chat({
  prompt: { user: 'Alice', history: [...lots of data] },
  useToon: true // Automatically serializes prompt to TOON
});

🔐 Persistence Hooks & Hashing

Every prompt is hashed (SHA-256). Use the onResponse hook to save to your database.

const client = new BridgeAIClient({
  onResponse: ({ prompt, response, hash }) => {
    db.save({ hash, text: response.text });
  }
});

🛠️ Agentic Tools

const response = await client.chat({
  prompt: 'What is the weather?',
  tools: [{
    name: 'getWeather',
    description: 'Get weather',
    parameters: { ... }
  }]
});

if (response.toolCalls) {
  // Execute function calls
}

🧪 Testing & Mocking

Test your app without spending a cent.

const client = new BridgeAIClient({ provider: 'mock' });

🤝 Supported Providers

| Provider | Config Name | Default Model | Env Variable | | :--- | :--- | :--- | :--- | | OpenAI | openai | gpt-4-turbo-preview | OPENAI_API_KEY | | Google Gemini | gemini | gemini-1.5-flash | GEMINI_API_KEY | | Anthropic Claude | claude | claude-3-5-sonnet-20240620 | ANTHROPIC_API_KEY | | Perplexity | perplexity | llama-3-sonar-large-32k-online | PERPLEXITY_API_KEY | | DeepSeek | deepseek | deepseek-chat | DEEPSEEK_API_KEY |

📖 Documentation

Visit our GitHub Pages for full API reference.

📄 License

MIT © Himanshu Mamgain