CoinGecko API review: when does the free Demo tier stop being enough?
CoinGecko's Demo API gives any project a free key with 10,000 calls a month and 18,000+ coins of coverage. We built a small price tracker against it, hit the rate ceiling on purpose, and worked out exactly where the $35 Basic and $129 Analyst plans start paying for themselves.
Our verdict
The free Demo key covers 18,000-plus coins and 1,500-plus exchanges at a stable 100 calls a minute, which is enough for a personal dashboard, a research script or a small Discord bot without paying anything. The ceiling shows up fast in anything with real users: a $35 Basic plan buys 300 requests a minute and 100,000 monthly credits, and a live product with more than a handful of concurrent users will need that within its first month. Start free, budget for Basic the moment your traffic stops being occasional.
Best for: Developers prototyping or running small tools who will upgrade once traffic is real
We built a small price tracker against CoinGecko's free Demo API to answer one question a lot of side projects ask eventually: when does free stop being free enough?
CoinGecko has run its aggregator since 2014, longer than most exchanges it now indexes, and the API grew out of that dataset rather than being built as a product on its own. That history shows up as depth: obscure tokens and small exchanges show up in the coin list well before they show up on a bigger platform's radar.
What the free key actually covers
CoinGecko's documentation states coverage of more than 18,000 coins, over 1,500 exchanges and 600-plus categories, with a separate onchain layer covering 200-plus blockchain networks and 1,800-plus DEXes through GeckoTerminal data. That is a wide net for a product with no mandatory payment step: register an account, generate a key, and the coverage above is available immediately.
The rate limit that actually applies to you
Here is the detail most comparisons skip: without a registered key, CoinGecko throttles requests to 5 to 15 calls a minute, shared across everyone on your IP address. That is unusable for anything beyond a curl command you run once. Registering a free Demo key changes the number to a stable 100 calls a minute, according to CoinGecko's own documentation, no credit card required.
