Side-by-side comparison of two Model Context Protocol servers — install paths, tools, quality signals, and directory engagement so you can pick the right one for Claude, Cursor, and other MCP clients.
Deterministic D&D 5e (SRD 5.2.1) rules verdicts for agents: cited legality checks for whole turns, legal-action enumeration, advantage math, and hash-stamped game-state lineage. Refuses what the rules don't decide (exit 2), quotes the rule text on every verdict, zero dependencies.
Magic: The Gathering card search, rules lookup, deck analysis, price data, and Commander intelligence. 14 tools, Scryfall + Academy Ruins + Commander Spellbook data.