Reins

Local MCP server that lets an AI agent trade Hyperliquid under enforced risk limits, with paper or live mode and a decision log.

What you can do

• Trade Hyperliquid markets in paper mode (live prices, simulated fills) or live mode, restricted to the configured symbols.
• Apply risk limits outside the model: maximum leverage, maximum position size per market, and a daily realised-loss cutoff that refuses new risk.
• Optionally refuse any order that adds risk without a stop-loss.
• Record each action as a JSON line with the agent's stated reason to a decision log file.
• Persist a paper account between runs in a file.

When to use it

Use it when you want an AI agent to place or simulate Hyperliquid trades but need hard limits, symbol allowlists and an audit trail that the model cannot override. Paper mode is the sensible starting point before any live trading.

Requirements

Runs locally via npx from the npm package, so Node.js is needed. Required settings: REINS_SYMBOLS, REINS_MAX_POSITION_USD and REINS_DAILY_LOSS_USD. Live mode additionally needs REINS_ACCOUNT_ADDRESS, REINS_PRIVATE_KEY (an API wallet key) and a one-time builder-fee approval from the account. Optional: REINS_MODE, REINS_NETWORK, REINS_MAX_LEVERAGE, REINS_REQUIRE_STOP_LOSS, REINS_LOG_FILE, REINS_PAPER_FILE. Network access to Hyperliquid.