KR Data for Agents (x402)

Endpoints (35 live)

• GET /crypto/eth-balance — Live native ETH balance + nonce for a wallet on Base: wallet=0x.. (0.002 USDC on Base)
• GET /kr/news-summary — Korean news search summarized in English with sentiment (korea, kospi, news) (0.01 USDC on Base)
• GET /crypto/token-risk — Base token risk check before you buy/approve: risk_score 0-100 + level, flags (honeypot, cannot_sell_all, high tax, mintable, hidden owner, proxy, blacklist, unverified), bytecode size, EIP-1967 proxy impl, owner(), buy/sell tax, honeypot simulation, top10 holder pct, holders. address=0x... (Base ERC-20). (0.01 USDC on Base)
• GET /kr/dart/latest — Latest Korean DART corporate filings for a KOSPI/KOSDAQ ticker, English summary (korea, kospi, dart) (0.01 USDC on Base)
• GET /crypto/hl-book — Hyperliquid perp L2 top-of-book for coin=BTC|ETH|SOL: best bid/ask, mid, spread_bps, top N levels (depth=1-20, default 5). (0.005 USDC on Base)
• GET /crypto/prices — Spot USD prices: median of Coinbase, Kraken, Bybit, Binance, CoinGecko (whichever respond) with n_sources, dispersion_bps, with 24h change/volume. symbols=BTC,ETH,SOL default; also BNB,XRP,DOGE,ADA,AVAX,LINK,SUI. (0.003 USDC on Base)
• GET /crypto/erc20-balance — Live ERC-20 balance on Base: token=0x..&wallet=0x.. -> balance (decimals applied), raw, symbol, block. (0.003 USDC on Base)
• GET /crypto/kimchi-premium — Live Korea kimchi premium: Upbit KRW vs global USD for BTC and ETH, plus USD/KRW FX. Korea crypto arb/sentiment signal. Optional symbols=BTC,ETH filter. Alias: /kr/kimchi-premium. (0.002 USDC on Base)
• GET /kr/kimchi-premium — Live Korea kimchi premium: Upbit KRW vs global USD for BTC and ETH, plus USD/KRW FX. Korea crypto arb/sentiment signal. Optional symbols=BTC,ETH filter. Alias: /kr/kimchi-premium. (0.002 USDC on Base)
• GET /crypto/hl-funding — Hyperliquid perp funding (hourly + APR), open interest (coins + USD), mark/oracle/mid px, 24h volume for BTC, ETH, SOL. Optional coin=BTC. (0.005 USDC on Base)
• GET /crypto/tx-status — Did this Base transaction succeed, and who paid whom? hash=0x.. (64 hex) -> status success|failed|pending, block, confirmations, timestamp, from, to, ETH value, gas used + fee in ETH, method (transfer / approve / transferWithAuthorization / Multicall3 ...), is_x402_settlement (EIP-3009 AuthorizationUsed on USDC), and every decoded ERC-20 Transfer (token, symbol, from, to, amount with decimals). Optional expect_to=0x..&expect_usdc=0.01 returns payment_verified true|false (did expect_to receive >= that USDC in this tx). When to call: after sending a tx, before delivering goods for a payment, to confirm an x402 settlement, or to explain an unknown hash. Cheaper than generic tx-decode APIs ($0.003). (0.002 USDC on Base)
• GET /crypto/funding-signal — Cross-exchange perp funding in one call: Hyperliquid + OKX + Gate + dYdX (+ Bybit/Binance/Bitget when reachable) funding APR per coin (BTC/ETH/SOL), mean APR, positioning signal EXTREME_LONG|LONG_HEAVY|NEUTRAL|SHORT_HEAVY|EXTREME_SHORT|MIXED, and the best funding-arb pair (short the highest venue, long the lowest) with spread APR. When to call: before opening a leveraged position, to spot squeeze setups, or to scan funding-divergence arbitrage. Optional coin=BTC. (0.006 USDC on Base)
• GET /crypto/market-pulse — One-call crypto market regime for trading agents: BTC/ETH/SOL median spot + 24h change, Hyperliquid funding APR + open interest, Korea kimchi premium, Crypto Fear & Greed index, and a regime label (risk_on|neutral|risk_off) with plain reasons. Replaces 4 calls (prices+hl-funding+kimchi+sentiment, $0.015) for $0.004. (0.004 USDC on Base)
• GET /crypto/wallet-snapshot — One-call Base wallet quick check (agent self-check or counterparty/payee check before you pay): native ETH + nonce + USDC balance + live gas cost of an ERC-20 transfer, and can_pay_gas / can_pay_x402 booleans. Cheaper than eth-balance + erc20-balance + base-gas separately ($0.006). wallet=0x.. (0.003 USDC on Base)
• GET /crypto/stablecoin-peg — Is USDC / USDT / DAI / USDe holding its $1 peg, and is stablecoin liquidity growing (risk-on) or shrinking (risk-off)? Top USD stablecoins: price, peg deviation in bps, status OK|DRIFT|WARN|DEPEG, Kraken cross-check for USDT/USDC/DAI, supply + 1d/7d change, dominance, supply on Base; plus total supply flow 1d/7d/30d, verdict ALL_PEGGED|WATCH|DEPEG_ALERT and alerts. When to call: before settling or parking funds in a stablecoin, as a systemic risk-off check in a trading loop. Optional symbols=USDC,USDT or top=1-30 (default 10). 5-min cache. (0.001 USDC on Base)
• GET /crypto/base-gas — Base gas oracle for agents sending Base txs: EIP-1559 slow / standard / fast tiers (maxFeePerGas + maxPriorityFeePerGas in gwei and wei hex, from eth_feeHistory 20 blocks p10/p50/p90), base fee, congestion 0-1, recommended_tier, ready-to-sign tx_fields, and est. cost in ETH + USD for your gas_limit (default 21000; use 65000 for an ERC-20 transfer). Cheapest paid call ($0.001). (0.002 USDC on Base)
• GET /crypto/ping — Paid heartbeat: cheapest way to test your x402 client end-to-end on Base USDC. Returns {ok:true,t,next}. (0.001 USDC on Base)
• GET /crypto/perp-movers — Whole-market perp scanner (all ~200 Hyperliquid perps) in one call: top_gainers, top_losers, top_volume, top_open_interest, highest_funding (crowded longs), most_negative_funding (crowded shorts / squeeze candidates), unusual_activity (24h volume / OI), plus market breadth (advance_ratio, broad_rally|mixed|broad_selloff). Each row: coin, mark_px, change_24h_pct, volume_24h_usd, open_interest_usd, funding_apr_pct, premium_bps, max_leverage. When to call: pick what to trade this hour, find funding extremes, momentum or mean-reversion screens. limit=1-25 (default 10), min_volume_usd (default 1,000,000). Replaces 7 separate $0.002 ranking calls; 30s cache. (0.002 USDC on Base)
• GET /crypto/prediction-markets — Live prediction-market odds (Polymarket) as clean implied probabilities, so your agent can price events: q=bitcoin|ethereum|solana|fed|election|any keyword (default crypto), limit=1-20 events (default 8), markets=1-20 per event (default 6). Returns events sorted by 24h volume, each with markets [{question, outcome_label, yes_prob, no_prob, best_bid, best_ask, change_1d, volume_24h, liquidity, end_date, url}], contested markets (5-95%) first; plus top_contested (the most-traded genuinely uncertain market). When to call: hedge or size a trade on BTC/ETH price targets, read crowd odds on Fed/macro/election events, feed an event-driven strategy. 2.5x cheaper than $0.0075 prediction-market endpoints; no match returns 404 and is never charged; 60s cache. (0.003 USDC on Base)
• GET /crypto/candles — OHLCV candlesticks (klines) for any major USDT pair with indicators precomputed, so your trading agent skips the math: symbol=BTC|ETH|SOL|BNB|XRP|DOGE|ADA|AVAX|LINK|SUI|... (or BTCUSDT), interval=1m|5m|15m|1h|4h|1d (default 1h), limit=10-500 (default 100). Returns candles [{t,o,h,l,c,v}] oldest->newest plus last close, change_pct over the window, EMA20, EMA50, RSI14, ATR14 (abs + pct), trend up|down|range, and a pullback zone EMA20 +/- 0.75*ATR (in_zone true/false). Source fallback Binance -> OKX -> Bybit (source field tells which). When to call: signal generation, backtest seed, stop/target sizing from ATR. 3.75x cheaper than $0.0075 candle endpoints; 60s cache. (0.002 USDC on Base)

+15 more endpoints.