Introduction

LLM Gateway is an open-source API gateway for Large Language Models. Route requests to multiple providers, manage API keys, track usage, and optimize costs.

LLM Gateway is an open-source API gateway that sits between your applications and LLM providers like OpenAI, Anthropic, Google AI Studio, and more. It provides a unified, OpenAI-compatible API interface with built-in cost tracking, caching, and intelligent routing.

Features

Routing

Intelligently route requests to the best available models and providers.

Caching

Reduce costs and latency by caching identical requests.

Image Generation

Generate images using AI models through the OpenAI-compatible API.

Web Search

Enable real-time web search capabilities for up-to-date information.

Reasoning

Use reasoning-capable models that show their step-by-step thought process.

Vision

Send images to vision-enabled models using URLs or inline base64 data.

AI Tooling

LLM Gateway is built to work seamlessly with AI agents and development tools.

llms.txt

Machine-readable index of all documentation pages for LLM consumption.

llms-full.txt

Complete documentation content in a single file for full-context LLM ingestion.

MCP Server

Use LLM Gateway as an MCP server for Claude Code, Cursor, and other MCP-compatible clients.

Agent Skills

Packaged instructions and guidelines for AI coding agents to generate higher-quality code.

Templates & Agents

Pre-built templates and agent configurations to get started quickly.

Next Steps

Quickstart — Get up and running in minutes
Overview — Learn more about what LLM Gateway offers
Self-Host — Deploy on your own infrastructure