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.
SEC EDGAR MCP for agents: search 10-K/10-Q, free sample preview, full filing JSON via x402 USDC on Polygon. xpay: sec-edgar-filings. Trial without xpay key: docs. Registry: io.github.stagproject/sec-filings-mcp.