Prices, OHLCV, DeFi TVL, yields, on-chain analytics and news across thousands of tokens. The core REST endpoints are free and need no API key. Individual data points can be bought for a fraction of a cent, settled in USDC over the x402 protocol, so an autonomous agent can pay for exactly the one number it needs.
These numbers are fetched from the API by your browser as this page loads. No cached values, no fixtures.
No signup, no key. Every command below is real and runs as written.
# Global market state
curl https://three.ws/api/coin/global
# Fear and Greed index
curl https://three.ws/api/coin/fear-greed
# Top coins by market cap
curl "https://three.ws/api/coin/markets?per_page=10"
# DeFi protocols ranked by TVL
curl https://three.ws/api/defi/protocolsThe free tier covers the data most applications need. All responses are JSON and CORS is open, so you can call them straight from a browser.
| Endpoint | Returns | Price |
|---|---|---|
/api/coin/global | Market cap, volume, dominance | Free |
/api/coin/markets | Ranked coins with price and volume | Free |
/api/coin/trending | Trending tokens | Free |
/api/coin/fear-greed | Sentiment index | Free |
/api/defi/protocols | Protocols ranked by TVL | Free |
/api/defi/yields | Yield pools with APY | Free |
/api/defi/stablecoins | Stablecoin supply and peg | Free |
/api/intel/heatmap | Market heatmap | Free |
Every metric is also addressable on its own. Ask for one field, pay for one field. Each call returns a signed, machine-readable answer and settles in USDC over x402, so an agent can buy data with no account, no key and no invoice.
# Ask without paying: the endpoint replies 402 with its price and payment terms
curl -i https://three.ws/api/x402/d/coin/bitcoin/price
# Other data points, same shape
# /api/x402/d/coin/<id>/<metric> price, market-cap, volume-24h, change-24h, ...
# /api/x402/d/protocol/<slug>/tvl
# /api/x402/d/chain/<name>/tvl
# /api/x402/d/gas/standard
# /api/x402/d/fear-greed/indexOver 4,000 of these data points are published in the x402 discovery document, priced at $0.0005 per call. Any x402 client can find and pay them automatically.