Market data API by cmc.io
The data behind cmc.io in one REST API: prices, candles, exchanges, fees after cashback, derivatives, liquidations and our own indicators. Start free, pay as you grow.
What you get
Coins
Prices, market cap, supply, volume, ATH/ATL and changes for thousands of coins; links and contracts.
Candles
OHLCV from 5 minutes to weeks, with history depth by plan.
Markets
Spot and futures pairs of every coin with spread, depth ±2% and volume share.
Exchanges
Volumes, adjusted volumes, fees and the cmc.io trust score with all its parts.
Fees after cashback
Maker and taker fees of every exchange after cmc.io cashback: data nobody else has.
Derivatives
Funding rates, settlements and open interest of perpetuals across exchanges, with history.
Liquidations
Live liquidations from exchange feeds, 1–24 h summaries and history.
Indicators
Our Fear & Greed index, BTC dominance and the altcoin season index.
DEX pools
Pools read on-chain by our own readers: liquidity, prices and 24 h volume.
One request away
curl "https://api.cmc.io/v1/coins?limit=1" \ -H "X-CMC-API-KEY: cmc_YOUR_KEY"
{
"data": [
{
"id": 1,
"slug": "bitcoin",
"symbol": "BTC",
"name": "Bitcoin",
"rank": 1,
"price_usd": 67250.12,
"market_cap_usd": 1325480000000,
"volume_24h_usd": 28140000000,
"price_change_24h": 1.84
}
],
"status": {
"timestamp": "2026-10-25T12:00:00Z",
"credits_used": 1,
"attribution": "Data: cmc.io",
"total_count": 9876
}
}Every answer is JSON in snake_case: data plus status with the credits used and the attribution to show.
Plans
A separate plan line from Premium. Pay monthly or save 20% yearly, from your cashback balance or in USDT/USDC.
Free
- 10,000 credits / month
- 30 requests / minute
- 30 days of history
- Personal, non-commercial projects
- Attribution “Data: cmc.io”
Starter
- 100,000 credits / month
- 60 requests / minute
- 365 days of history
- Commercial use in your own product
- Attribution “Data: cmc.io”
Pro
- 500,000 credits / month
- 120 requests / minute
- 730 days of history
- Commercial use in your own product
- Attribution “Data: cmc.io”
Business
- 2,000,000 credits / month
- 300 requests / minute
- Full history
- Commercial use and redistribution
- Attribution “Data: cmc.io”
Pay from your cashback balance or in USDT/USDC. Payments from the cashback balance renew automatically at the end of each period; you can turn auto-renew off in your profile.
How credits work
A request to current data or a list costs 1 credit; history (candles, funding, open interest, liquidation history) costs 5. Failed requests are free. Credits renew on the 1st of every month (UTC); the per-minute limit protects the service from bursts.
Documentation
Interactive reference with every endpoint, parameter and response, and an OpenAPI file for code generators.
Use and attribution
- Free: personal and non-commercial projects only.
- Starter and Pro: use the data inside your own product, including commercial apps, bots and dashboards. Reselling or redistributing the raw data is not allowed.
- Business: commercial use and redistribution of the data to your clients, with attribution.
- On every plan show “Data: cmc.io” (with a link to cmc.io where possible) next to the data.
- The API serves data cmc.io collects and computes itself; texts and data licensed from third parties are not included.
CMC.IO provides a fundamental analysis of the crypto market. In addition to tracking price, volume and market capitalization, CMC.IO tracks community growth, open-source code development, major events and on-chain metrics.
© 2023 CMC.IO. All rights reserved