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.
MapRag: RAG-focused subregistry + MCP server to discover and route to retrieval-capable MCP servers using structured constraints and explainable ranking.
209 pay-per-call AI capabilities via x402 USDC micropayments on Base mainnet. Covers US/global equities, crypto/DeFi analytics, options chains, dealer GEX, macro indicators, congressional trades, prediction markets, on-chain intelligence, EVM & Solana analysis, SEC filings, weather, aviation, and more. No API key — pay per call from $0.001 USDC.