TL;DR: Which Free Crypto API is the Best?

• CoinGecko API is the best free crypto API for most developers and AI agents as it combines the broadest coverage (17,000+ coins, 38M+ tokens, 1,700+ exchanges, 260+ networks), generous free-tier limits (10,000 monthly calls at 100 calls/min), and a flat 1-credit-per-request model that keeps bulk queries efficient — paired with keyless access and a free Demo API plan for fast onboarding.
• When choosing a free crypto API, weigh coverage, rate limits, free-plan credits alongside the credit charging model, endpoint access, historical depth, and how easily the plan scales into commercial use.
• For specialised cases, consider CoinAPI or direct exchange APIs (Binance,…