LLM Gateway

LLM Gateway is an open-source API gateway for Large Language Models (LLMs). It acts as a middleware between your applications and various LLM providers, allowing you to:

• Route requests to multiple LLM providers (OpenAI, Anthropic, Google Vertex AI, and others)
• Manage API keys for different providers in one place
• Track token usage and costs across all your LLM interactions
• Analyze performance metrics to optimize your LLM usage

Features

• Unified API Interface: Compatible with the OpenAI API format for seamless migration
• Usage Analytics: Track requests, tokens used, response times, and costs
• Multi-provider Support: Connect to various LLM providers through a single gateway
• Performance Monitoring: Compare different models' performance and cost-effectiveness

Getting Started

You can use LLM Gateway in two ways:

• Hosted Version: For immediate use without setup, visit llmgateway.io to create an account and get an API key.
• Self-Hosted: Deploy LLM Gateway on your own infrastructure for complete control over your data and configuration.

Using LLM Gateway API

curl -X POST https://api.llmgateway.io/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $LLM_GATEWAY_API_KEY" \
  -d '{
  "model": "gpt-4o",
  "messages": [
    {"role": "user", "content": "Hello, how are you?"}
  ]
}'

Development Setup

1. Install dependencies and set up the development environment:

   pnpm i && pnpm run setup

   This will install all dependencies, start Docker services, sync the database schema, and seed initial data.

   Note for WSL2 users: Ensure Docker Desktop is running with WSL integration enabled.

2. Start development servers:

   pnpm dev

3. Build for production:

   pnpm build

Folder Structure

• apps/ui: Vite + React frontend
• apps/api: Hono backend
• apps/gateway: API gateway for routing LLM requests
• apps/docs: Documentation site
• packages/db: Drizzle ORM schema and migrations
• packages/models: Model and provider definitions
• packages/shared: Shared types and utilities

License

LLMGateway is available under a dual license:

• Open Source: Core functionality is licensed under AGPLv3 - see the LICENSE file for details.
• Enterprise: Commercial features in the ee/ directory require an Enterprise license - see ee/LICENSE for details.

Enterprise features include:

• Advanced billing and subscription management
• Extended data retention (90 days vs 3 days)
• Provider API key management (Pro plan)
• Team and organization management
• Priority support
• And more to be defined

For enterprise licensing, please contact us at contact@llmgateway.io