Brazil business days and holidays: is a date a business day, next/previous business day, add N business days, or count business days between dates (national holidays).

Search scientific papers across OpenAlex (250M works, all fields), arXiv (preprints) and PubMed (biomedicine) in one call. Returns title, up to 5 authors, year, venue, DOI, landing URL, open-access PDF URL, citation count and abstract (up to 600 chars), merged and deduplicated by DOI. Params: query (required), source ('all' default, 'openalex', 'arxiv', 'pubmed'), limit (1 to 25, default 10), year_from, open_access_only (default false).

Current USD market snapshot for a supported cryptocurrency symbol or CoinGecko asset name

x402 APIs grouped into categories (crypto and on-chain, LLM and AI, web and search, media, finance, social, geo and weather, developer tools, other) with listings, origins, well-paid listings, calls and median price.

IP geolocation: give an IPv4 or IPv6 address, get its country, region, city, continent and approximate coordinates.

Perpetual futures funding rates and open interest (Hyperliquid), live: the 10 perps with the most extreme funding rate now (over $1M 24h volume), each with annualized funding APR and open interest in USD, plus the current funding rate for a BTC/ETH/SOL/HYPE/NEAR/AAVE watchlist. Use it to spot crowded longs or shorts, squeeze risk and funding-carry candidates. For one perp's full funding + OI snapshot use /perps/{symbol}. JSON. Free sample: /samples/funding. $0.0025 USDC per call on Base.

The x402 APIs with the most distinct payers (or calls) in the last 30 days, optionally within a category, with price and measured uptime.

What is the sales tax rate at this US address, ZIP+4 or ZIP? The combined rate and each state, county, city and district rate in the 24 Streamlined Sales Tax states (WA, OH, MI, NJ, TN, …), computed by Distill from each state’s SST rate and boundary files. Updated quarterly. $0.005 per call (x402, USDC on Base); 3 free calls a day.

Top crypto stories now from 31 sources, each with an impact score, outlet count and the price reaction afterwards.

Futures basis and term structure of one coin: dated futures on Bybit, Deribit, Kraken, Gate and OKX with days to expiry, basis vs index and annualised basis (contango or backwardation, the carry), the perp premium (mark vs index/oracle) on Hyperliquid, dYdX, Bitfinex and the others, and predicted funding. Crypto futures basis for BTC, ETH and more. Data only. Bad input is free; under 2 venues not charged.

Volume-anomaly observations across newly created BSC pools, from a 15-minute monitoring sweep: pools whose hourly volume spiked vs the prior hour (floor $1,000 and 100x), with pool name, hourly volume, spike ratio, price move and source link. Machine-readable monitoring feed for agents tracking early on-chain activity. Observation data only — thresholds uncalibrated; not signals, not financial advice. Refreshed every 15 minutes; data age disclosed in every response.

Verified market-moving events for crypto agents: headlines categorized (liquidations, macro, regulation and more) and tagged to BTC/ETH, each with source, publisher, timestamp, original link, and a trust tier distinguishing primary official sources from aggregated headlines. Filter by symbol, category, and count. Fresh every 15 minutes.

Funding rate history of one coin on one exchange (Bybit, Hyperliquid, dYdX, Gate, Kraken, Deribit or OKX), up to 30 days: every past funding print with interval, 8h rate and APR, plus avg/min/max/% positive and the window covered. Historical perpetual swap funding for backtests and carry studies on BTC, ETH, SOL and more. Data only. Bad input is free; a venue that fails is not charged.

Tasas de referencia del BCRA: política monetaria, BADLAR y TAMAR.

Bid-ask spread, order-book imbalance, buyer share of the last 15 minutes and volume versus normal per coin.

Fast token risk verdict (1-3 s) for trading agents: LOW/MEDIUM/HIGH with reasons for any ERC-20. Who controls it (renounced, single key, Safe, timelock), upgradeable proxy, admin powers in the bytecode (mint, blacklist, pause, sell tax, trading switch), Sourcify status, DEX liquidity, buys/sells and pair age. Ethereum, Base, Arbitrum, Optimism, Polygon, BNB. Use before buying a token. Not financial advice.

Multi-timeframe market state for BTCUSDT, ETHUSDT, SOLUSDT, XRPUSDT & DOGEUSDT USD-M perpetual futures in one call: mark & index price, funding rate, open interest change, taker buy share, per-timeframe (4h/1h/15m) EMA-20/50, RSI-14, ATR and prior 20-bar high/low. Structured for trading agents needing clean market context. Descriptive data only — not financial advice. Refreshed every 15 min; data age disclosed in every response.

Liquidations of one coin's perpetual futures: recent forced liquidations from the Gate, Bitfinex, dYdX, Deribit and OKX public feeds, long and short liquidations in USD per venue, the totals and the largest events over 1-24h. Liquidation data for BTC, ETH, SOL and more; Bybit, Hyperliquid and Kraken are listed as not covered (WebSocket only). Data only. Bad input is free; under 2 feeds not charged.

Working days / next working day in a date range: weekends + gazetted public holidays

Use when the user asks whether a Dutch neighbourhood or postcode is safe: police-registered crime per 1,000 residents vs the national rate, split into burglary, bicycle theft, vehicle crime, violence and vandalism, with counts and a ratio. Input: Dutch postcode or CBS buurt code. Source: Politie open data, CBS.