Free API Feeds

These 8 feeds use free public APIs and are priced affordably (0.003-0.008 STX).

Liquidation Alerts

Feed ID	Price	Source
liquidation-alerts	0.008 STX	Binance Futures

Futures liquidation alerts — long/short liquidations across top pairs. Useful for detecting leverage flush-outs and potential reversal points.

const result = await sf.buy('liquidation-alerts');
// result.data.total_liquidations_24h, long_liquidations, short_liquidations
// result.data.pairs → [{pair, long_short_ratio}, ...]

Gas Prediction

Feed ID	Price	Source
gas-prediction	0.003 STX	Blocknative + mempool.space

ETH gas prices (slow/standard/fast) and BTC mempool fee estimates (economy/normal/priority).

const result = await sf.buy('gas-prediction');
// result.data.ethereum → {slow, standard, fast} (gwei)
// result.data.bitcoin → {economy, normal, priority} (sat/vB)

Token Launches

Feed ID	Price	Source
token-launches	0.005 STX	DEXScreener

New and trending token launches with boost status, volume, and chain info.

const result = await sf.buy('token-launches');
// result.data.tokens → [{name, symbol, chain, price_usd, volume_24h}, ...]

Governance

Feed ID	Price	Source
governance	0.005 STX	Snapshot.org

Active DAO proposals and voting from 7 major DAOs (Aave, Uniswap, ENS, Arbitrum, Optimism, Compound, MakerDAO).

const result = await sf.buy('governance');
// result.data.total_active → 12
// result.data.proposals → [{dao, title, state}, ...]

Stablecoin Flows

Feed ID	Price	Source
stablecoin-flows	0.005 STX	DeFiLlama

Stablecoin market cap changes, peg deviations, and chain distribution for USDT, USDC, DAI, etc.

const result = await sf.buy('stablecoin-flows');
// result.data.total_market_cap → 180000000000
// result.data.stablecoins → [{name, market_cap, change_7d}, ...]

Security Alerts

Feed ID	Price	Source
security-alerts	0.005 STX	DeFiLlama

DeFi security monitoring — identifies protocols with audit risks and tracks recent exploits.

const result = await sf.buy('security-alerts');
// result.data.high_risk_count → 3
// result.data.alerts → [{name, risk_level, description}, ...]

Dev Activity

Feed ID	Price	Source
dev-activity	0.003 STX	GitHub API

Developer commit activity across Stacks, Ethereum, and Solana ecosystem repos.

const result = await sf.buy('dev-activity');
// result.data.total_commits_24h → 847
// result.data.repos → [{name, ecosystem, commits}, ...]

Bridge Flows

Feed ID	Price	Source
bridge-flows	0.005 STX	DeFiLlama

Cross-chain bridge TVL and volume analysis. Tracks capital flows between chains.

const result = await sf.buy('bridge-flows');
// result.data.total_tvl → 25000000000
// result.data.chains → [{name, tvl, change_24h}, ...]