World Bank development data for any country: GDP, GDP per capita, growth, population, inflation, unemployment, life expectancy, CO2, exports, debt, internet use, FDI or any indicator code, by year. Use for country comparisons and market sizing.

Registration data of a domain from RDAP, the official WHOIS successor: registrar, creation, update and expiry dates, status codes, nameservers, DNSSEC and registrant organisation/country where public. Says whether an unregistered name looks available. Use for domain research, due diligence or phishing checks.

Subdomains of a domain found in public Certificate Transparency logs (crt.sh), with first certificate and current validity date. Use for attack-surface mapping, asset inventory or competitor research.

Decode EVM transaction input data: looks up the 4-byte function selector and decodes every argument (addresses, amounts, arrays). Use to see what a transaction or signing request will really do.

Screen a person or company name against the US Treasury OFAC SDN list including aliases, with fuzzy matching: match score, entity type, sanctions programs and remarks. Use for KYC, payouts and onboarding.

Check up to 50 crypto addresses (ETH, BTC, TRX, USDT, SOL and more) against the OFAC SDN list's digital currency addresses: PASS or BLOCK with the sanctioned party and program. Use as a pre-payment AML gate.

What is at an EVM address: wallet (with EIP-7702 delegate) or contract, bytecode size, token standard (ERC-20/721/1155), name, symbol, decimals, supply, owner() and proxy implementation. Use before interacting with an unknown address.

Call any read-only contract function without a transaction or ABI file: give the signature with return types, e.g. balanceOf(address)(uint256) or getReserves()(uint112,uint112,uint32), plus arguments; returns decoded values.

Price of a coin in KRW on Upbit and Bithumb with 24h change, high/low and volume, plus the kimchi premium versus the global USD price. Use for Korea arbitrage signals and local pricing.

Search arXiv preprints (AI, physics, math, CS, quant finance...) by keywords or field query: title, authors, abstract, categories, dates and PDF link, by relevance or newest. Use for literature review or tracking new research.

Lint a Dockerfile for security and best practice: unpinned or latest images, running as root, secrets in ENV/ARG, curl piped to sh, ADD of URLs, apt and pip caches, sudo, chmod 777, missing HEALTHCHECK. Scored.

An EVM block by number or tag (latest, finalized, safe): hash, parent, time, miner, gas used and limit, base fee, size and its transaction hashes.

Deribit BTC or ETH options: open interest and volume of calls vs puts, put/call ratio, and per expiry the max-pain strike and at-the-money implied volatility, plus the DVOL volatility index.

Cryptographically secure random values: UUID v4 or v7, strong passwords, hex or URL-safe tokens, integers in a range, dice rolls or coin flips, up to 100 at once.

Decode a JSON Web Token without verifying it: header, algorithm, payload claims, issued-at/expiry times and whether it has expired. Use to debug auth tokens and API sessions.

Detect a file's real format from its first bytes (magic numbers), given as base64 or hex: MIME type, extension and a warning when it does not match the file name. Use to validate uploads.

Live US airport disruptions from the FAA: closures, ground stops, ground delay programs and arrival or departure delays with reason, average and max delay and expected end. Filter by airport code (JFK, LAX).

FX carry trade ranking from central-bank policy rates: currency pairs ranked by interest-rate differential, optionally for one funding currency such as JPY or CHF.

Current policy interest rates of about 40 central banks (Fed, ECB, BoE, BoJ, PBoC, SNB, RBI...) with the date of the latest value, highest first, from the BIS. Filter by country or currency code.

Total supply, name, symbol and decimals of an ERC-20 or ERC-721 contract, read on-chain. Use for market-cap math, supply checks and token due diligence.