Read a website's /llms.txt (the standard that tells LLMs what a site is about) as structured data: title, summary, sections with links and descriptions, and whether llms-full.txt exists.

World stock exchanges clock: status (open, closed, lunch break), local time, today's session and next open for NYSE, Toronto, London, Euronext, Xetra, Madrid, Zurich, Tokyo, Hong Kong, Shanghai, India and Sydney.

Current delays and closures at US airports from the FAA: ground delay programs, ground stops, arrival/departure delays and closures with reason and duration; filter by IATA code (JFK, LAX, ORD...).

Read the codes in an image URL: QR, Data Matrix, Aztec, PDF417, EAN-13, UPC, Code 128, Code 39... with format, content and position; flags URLs, crypto payment URIs (bitcoin:, ethereum:, solana:) and wifi credentials.

Search scientific papers on arXiv (AI, physics, maths, economics...): title, authors, abstract, categories, dates and PDF link; by relevance or newest, with category filter (cs.AI, cs.CR, q-fin...).

Find a Spanish municipality or town by name: INE code, province, region and coordinates, with alternatives when several match. Official CartoCiudad (IGN) data, CC BY 4.0.

Annual government deficit (-) or surplus (+) as % of GDP for any European country; without a country, a ranking. Official Eurostat data.

Convert APR to APY or APY to APR for any compounding frequency (continuous, daily, hourly, per block...) and optionally project the final value and gain of a deposit over N days. Useful to compare DeFi yields.

Convert integers of any size (signed) between bases 2 to 36: binary, octal, decimal, hex, base32, base36, with bit and byte length and two's complement. Accepts 0x/0b/0o prefixes.

Count the tokens of a text with OpenAI tokenizers (o200k for GPT-4o/4.1/5, cl100k for GPT-4/3.5) plus estimates for Claude, Llama and Gemini, with characters per token. Budget LLM calls and split contexts.

Find airports by IATA/ICAO code, name or city, or the nearest to coordinates: name, codes, city, country, coordinates, elevation and scheduled service. OurAirports open data.

Validate EAN-8, EAN-13, UPC-A, GTIN-14, ISBN-10 and ISBN-13: check digit (and the expected one if wrong), code type, GS1 prefix and registering country, plus ISBN-10/13 conversion.

Decode EVM calldata (transaction input) with the function signature you provide, checking that it matches the selector, or decode return data with its output types (e.g. uint256,address). Local calculation, no third-party signature databases.

Encode a contract function call (calldata) from its signature and arguments, e.g. transfer(address,uint256) with [to, amount]: selector and hex data ready to sign or simulate.

Great-circle distance between two airports by IATA or ICAO code in km, miles and nautical miles, bearing, approximate flight time and estimated economy-class CO2 per passenger.

Reference data for a blockchain by its chainId: name, gas/native token, block explorers, number of public RPCs and website. Utility for multi-chain agents. Live from chainid.network (ethereum-lists, open data).

Savings or investment plan with monthly contributions and compound interest: final value, total contributed, interest earned, value in today's money after inflation, yearly evolution and the monthly amount needed to reach a goal.

Convert APR to APY or APY to APR for any compounding frequency (continuous, daily, hourly, per block...) and optionally project the final value and gain of a deposit over N days. Useful to compare DeFi yields.

npm package profile: latest version, description, license, repository, dependencies, unpacked size, weekly and monthly downloads, maintainers and deprecation flag. For dependency choice and audits.

DNS records of a domain with TTL: A, AAAA, CNAME, MX, NS, TXT, SOA, CAA, SRV, HTTPS. Choose the types or get the common ones at once.