chainmarketcap — 2500+ networks ranked by market cap · screen by cap, type, movers · 5m · 1h · 4h · 24h · 7d · add to MetaMask · RPCs
Keys live in this browser's localStorage only — never in the page source, never sent anywhere but the endpoint named. The feed stays slow and steady: one refresh every 5 minutes, whatever keys are set. CoinMarketCap's API does not answer browsers directly (no CORS) — a personal-tier key works through a proxy you run; without one the key is kept ready and reported as blocked.