Cryptocurrency · head-to-head
Alpha (Mossland) vs Mempool
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.
mempool.space runs an open-source Bitcoin block explorer and fee-estimation API — originally forked from Blockstream's Esplora backend and now maintained as its own mempool/electrs fork — answering over REST and WebSocket with no signup needed to read blocks, transactions, addresses, and the Lightning Network graph. It's free for public use, with a paid Mempool Enterprise tier adding unmetered access and multi-datacenter SLAs for heavier commercial traffic.
| Alpha (Mossland) | Mempool | |
|---|---|---|
| Authentication | None | None |
| Pricing | free | freemium |
| Formats | JSON | JSON, WebSocket |
| CORS | yes | yes |
| HTTPS | Yes | Yes |
Mempool supports 2 response formats, while Alpha (Mossland) offers fewer — pick Mempool for more integration flexibility.