Alpha (Mossland) vs CoinGecko

Alpha is Mossland's free, keyless public API that turns Korean-language crypto YouTube/news/macro chatter plus Mossland's own on-chain activity into a queryable knowledge base of canonical entities, topics, and events. Its /api/ask endpoint answers natural-language questions in Korean or English with citations back to source videos or briefs, and a companion MCP server exposes 12 tools for Claude Desktop, Cursor, and similar agent clients over JSON-RPC. Every surface is HTTPS-only with no signup, though the docs note unauthenticated abuse may trigger a per-IP rate cap.

CoinGecko is one of the largest independent crypto data aggregators, tracking price, market cap, volume, and metadata for 17,000+ coins across 1,000+ exchanges without requiring registration for its free public endpoint. A Demo API key unlocks slightly higher limits, while paid Pro plans add exchange order-book data, NFT floor prices, and on-chain DEX data through the same JSON interface.