Guide

Topic-oriented deep dives. Unlike tutorials, no prescribed order.

Protocols

• REST API — 41 HTTP endpoints, curl-friendly
• gRPC — cross-language, generic Request(proto_id, body) + streaming push
• WebSocket — core WS (Futu SDK) + REST /ws push
• MCP — 19 LLM tools, stdio / HTTP transports

Auth & configuration

• Auth & limits — Scope / keys.json / soft machine binding / SIGHUP
• CLI flags — full flag list for futu-opend / futu-mcp / futucli
• keys.json fields — field semantics / defaults / examples

Operations

• Audit & observability — JSONL audit / Prometheus / Grafana
• Benchmarks — criterion micro-benchmarks: auth hot path ~2.5 µs
• API Reference (rustdoc) — 14-crate Rust API docs