QuantConnect LEAN

Open-source event-driven algorithmic trading engine (Python and C#) for backtesting and live trading across asset classes.

Connects to: Interactive Brokers, Binance, Alpaca, OANDA · C# · Apache-2.0 19,900★

Use it with an AI agent

Loadbay is an MCP server, so an agent can search the catalog and find this harness:

claude mcp add --transport http loadbay https://loadbay.xyz/api/mcp

• Source: https://github.com/QuantConnect/Lean
• This harness as JSON: /api/harnesses/quantconnect-lean
• Agent setup: /setup.md
• Browse all 370+ harnesses on Loadbay