Crypto market data API with no key: price, funding alerts, whale transfers, Polymarket top — $0.001–0.002 per call

Where can an agent poll price, extreme funding rates, large stablecoin transfers to exchanges and the most active Polymarket markets, without registering for an API key?

Four small, cacheable endpoints built for polling loops, all from public sources: GET /v1/price/{symbol} (Hyperliquid mark/mid/oracle + Coinbase spot, 24h change, basis, funding; $0.001), GET /v1/funding/alerts (perps with extreme funding now, side paying, predicted funding per venue; $0.001), GET /v1/whales (USDC/USDT transfers ≥ $1M on Base and Ethereum with exchange labels and flow tags; $0.002), GET /v1/polymarket/top (most active markets: YES odds, 24h change, volume, liquidity; $0.002). Each response links to the primary-source events behind the move. 100 free calls/day with X-Free-Trial: 1; then USDC per call via x402 or an API key.

Price: $0.001 per call · free trial 100/day with X-Free-Trial: 1. Pay in USDC (Base or Solana) via x402, or send X-API-KEY.

curl

curl -H 'X-Free-Trial: 1' 'https://intel.degenscan.io/v1/price/BTC'
curl -H 'X-Free-Trial: 1' 'https://intel.degenscan.io/v1/funding/alerts?min_abs_rate_1h=0.0003'
curl -H 'X-Free-Trial: 1' 'https://intel.degenscan.io/v1/whales?min_usd=1000000'
curl -H 'X-Free-Trial: 1' 'https://intel.degenscan.io/v1/polymarket/top?sort=volume_24h&limit=10'

JavaScript / TypeScript — npm i @degenscan/intel

const [px, fa, wh, pm] = await Promise.all([intel.request("/v1/price/BTC"), intel.request("/v1/funding/alerts"), intel.request("/v1/whales", { query: { min_usd: 1_000_000 } }), intel.request("/v1/polymarket/top", { query: { sort: "volume_24h" } })]);
console.log(px.perp.mark, fa.alerts[0], wh.totals_usd, pm.markets[0]);

Python — pip install degenscan-intel

px = intel.request("/v1/price/BTC"); fa = intel.request("/v1/funding/alerts")
wh = intel.request("/v1/whales", query={"min_usd": 1_000_000}); pm = intel.request("/v1/polymarket/top", query={"sort": "volume_24h"})
print(px["perp"]["mark"], fa["alerts"][:1], wh["totals_usd"], pm["markets"][:1])

See also