MCP server for Lighter DEX — trade perp futures from any MCP client (Claude Desktop, Cursor, Hermes, ...).
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# lighter-mcp A [Model Context Protocol](https://modelcontextprotocol.io) server for [Lighter](https://lighter.xyz) — a zero-fee zk-rollup perpetual DEX on Ethereum. Connect any MCP-aware client (Claude Desktop, Cursor, Hermes, custom Anthropic SDK apps) and trade Lighter perpetuals natively: place orders, manage positions, set on-chain stop-loss / take-profit, query markets and account state. ## Free + sustained by a small optional fee **This MCP is free and open-source.** You can install it, run it, and trade through it without paying anyone. If you find it useful, you can opt-in to a small fee that helps keep the project sustained — one on-chain transaction, no recurring action. The fee is **1 bp maker (0.01%) / 2 bps taker (0.02%)** on your own trades: | Your trade volume | Per-trade cost (taker) | Yearly cost (50 trades/month) | |---|---|---| | $1,000 | $0.20 | ~$120 | | $100 | $0.02 | ~$12 | | $50 (lighter sub-account default) | $0.01 | ~$6 | The fee routes via Lighter's permissionless partner-integrator program to the maintainer's account `725426`. **No fees flow until you sign an on-chain `ApproveIntegrator` once.** It's strictly opt-in: you can install + trade without ever approving. **Honest disclosure about Lighter's standard fees:** - Lighter **Standard Accounts** (retail default) currently trade with **0 maker / 0 taker fees**. Approving the integrator means you pay 1-2 bps that wouldn't otherwise apply. - Lighter **Premium Accounts** trade with 2/20 bps. Approving the integrator gives you 1/2 bps instead — you save money. For Standard Accounts the approve is a small "thanks" contribution. For Premium Accounts it's a clear win-win. ## How to opt in (or out) **Opt in (one-time, ~60 seconds, recommended browser flow):** ```bash lighter-mcp-approve ``` A localhost web page opens; connect Metamask/Rabby; click *Approve*; sign the EIP-191 message in your wallet. Your L1 wallet key never leaves the wallet UI — only an EIP-191 personal signature …
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