lifi

# LI.FI Cross-Chain Integration Guide Use LI.FI when a Solana app, wallet, backend, or AI agent needs cross-chain token transfers, bridge aggregation, same-chain swaps, payment flows, or transfer status tracking. LI.FI exposes the same routing engine through REST API, SDK, MCP server, CLI, and Widget surfaces. ## Overview LI.FI is a multi-chain liquidity aggregation platform for swaps and bridging. For agent and backend integrations, the REST API is the lowest-dependency default. For frontend apps, prefer the SDK because it handles wallets, signing, execution tracking, and ecosystem-specific transaction handling. For MCP-compatible AI hosts, prefer the LI.FI MCP server for typed tool discovery. Core capabilities: - **Quotes**: Get a ready-to-sign transaction for the best route. - **Routes**: Compare multiple route options and execute step-by-step. - **Status tracking**: Track source and destination chain transfer progress. - **Discovery**: Query supported chains, tokens, bridges, and exchanges at runtime. - **Solana support**: Request Solana-specific chain/token data via `chainTypes=SVM` and use `SOL` as the Solana chain key in API examples. ## Product Surface Selection Choose the smallest surface that matches the task: - **REST API**: Backend services, scripts, and general AI agents. Simple HTTP calls, no runtime dependency. - **SDK (`@lifi/sdk`)**: Frontend or full execution flows. Handles wallet connectors, signing, route execution, and update hooks. - **MCP Server...