> ## Documentation Index
> Fetch the complete documentation index at: https://docs.leokit.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Introduction

> Learn about LeoKit API - a unified interface for cross-chain cryptocurrency swaps

## Overview

The LeoKit API provides a unified interface for cross-chain cryptocurrency swaps, supporting multiple blockchain ecosystems and aggregating quotes from various decentralized exchange (DEX) protocols. The API handles the entire swap lifecycle from quote generation to transaction execution.

## Supported Protocols

LeoKit aggregates quotes from 6 leading DEX protocols:

* **THORChain** - Cosmos-based native cross-chain DEX
* **MAYAChain** - THORChain fork with CACAO support
* **Chainflip** - Substrate-based cross-chain protocol
* **Relay** - EVM-focused aggregator and bridge
* **NEAR** - NEAR Protocol native swaps via 1Click
* **LeoBridge** - LeoFinance proprietary bridge

## Supported Blockchain Ecosystems

LeoKit supports 8 major blockchain ecosystems with broad network coverage:

* **EVM** - Ethereum, BSC, Arbitrum, Polygon, Avalanche, Base, Optimism, Fantom
* **UTXO** - Bitcoin, Litecoin, Dogecoin, Dash, Bitcoin Cash, Zcash
* **Cosmos** - Cosmos Hub, Kujira, THORChain, MAYAChain
* **NEAR** - NEAR Protocol
* **TRON** - Tron Network
* **Cardano** - Cardano blockchain
* **XRP** - Ripple/XRP Ledger
* **Solana** - Solana blockchain (partial support)

## Base Information

### Content Type

All API requests and responses use `application/json` format.

### CORS

CORS is enabled for all origins, making it easy to integrate LeoKit into web applications.

### Rate Limiting

Rate limiting is configured per client API key. Each API key has its own rate limit settings to ensure fair usage.

### Cache Strategy

LeoKit implements strategic caching to optimize performance:

* **Quote responses**: 5 seconds
* **Assets list**: 20 seconds
* **Completed transactions**: Long-term caching

This caching strategy reduces latency while ensuring data freshness where it matters most.