Check a crypto address (BTC, ETH/EVM, TRON, USDT, XMR, LTC...) for an exact match with OFAC SDN digital currency addresses; returns the designated entity, currency and programs.

Open interest of a coin's perpetual per venue (Binance, Bybit, OKX, Hyperliquid) in contracts and USD with market share, 24h change where history exists (Binance, Bybit), and the Binance long/short account ratio.

Korea premium per coin: Upbit and Bithumb KRW prices vs the Binance USDT price, converted with the ECB USD/KRW reference rate (date returned); without symbols, the top 20 Upbit markets by 24h KRW volume.

Downloads a public URL (max 5 MB, redirects followed and re-checked) and returns its content as base64 with a data URI prefix, content type, byte size, sha256 and final URL.

Convert an amount between ~50 currencies at the official reference rate (Bank Al-Maghrib for MAD pairs, ECB otherwise, cross via EUR), with rate, date and source.

Highest and lowest annualized funding rates across all Binance USDT-margined perpetuals and Hyperliquid perps, with open interest in USD and a minimum open interest filter (default $5M).

One paper in full detail by DOI, arXiv id or OpenAlex id: all authors with institutions and ORCID, abstract, venue, open-access links, topics with fields, citation count and citations per year, references count.

Curve slopes 2s10s and 3m10y in bp for US, euro area and Morocco with inversion flags, plus cross-market 10Y spreads (US-EA, MA-US, MA-EA).

Most traded open prediction markets right now across Polymarket and Kalshi, ranked by 24h volume, with implied probabilities and links.

Up to 20 contract reads on one chain in a single Multicall3 request; each call returns success, decoded result and raw hex, or its revert reason.

Validates one email (email=) or up to 50 (emails=comma list, same price): RFC 5322 syntax, normalized form, MX records (A fallback), disposable, role account, free provider, typo suggestion, and a deliverable/risky/undeliverable verdict with reasons. No SMTP probing.

Latest CISA Known Exploited Vulnerabilities (filter by days, vendor, product, ransomware use) with due dates, required action and EPSS score joined.

DeFi TVL from DefiLlama: top protocols filtered by category and chain (TVL, 1d/7d change, market cap, chains), chain TVL rankings with protocol counts, or one protocol with per-chain TVL split and 90 days of daily TVL history.

CVE lookup by id or NVD keyword search (severity, days, maxItems): CVSS v3.1/v4 score+vector, CWE, affected products, references, CISA KEV status, EPSS score and a patch priority line.

One Hacker News story (or comment) by id with up to 30 top-level comments: author, time, plain text up to 500 characters and reply count.

Call any view/pure function with a human-readable signature on Ethereum, Base, Arbitrum, Optimism, Polygon or BSC: decoded result, raw hex, block number, chain id; 422 with revert reason on revert.

Spot OHLCV candles (1m to 1w, up to 1000) for a coin against USDT from Binance (fallback OKX), with window open/high/low/close, change % and exact traded VWAP.

Token metadata for any contract: ERC-20 name, symbol, decimals, total supply (raw and formatted), or ERC-721 / ERC-1155 detection via ERC-165 interfaces.

Domain registration and DNS in one call: RDAP registrar, created, updated, expires (days left), status codes, nameservers, DNSSEC, plus DNS A, AAAA, MX, NS, TXT and CAA records.

ENS (Ethereum) and Basename (*.base.eth on Base) resolution: name to address with avatar, url, twitter, github, description records, or address to forward-verified primary names.