VAT calculator for EU-27 + UK: net→gross or gross→net at standard or reduced rate. Includes rates table snapshot date.

Get weather observations (METAR) for a specific airport

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Crypto ETF Sentinel — Latest POS AM-extracted operational profile for one US spot crypto ETF issuer: custodian, sponsor fee, AP counts, in-kind eligibility, basket size. Use when you need one fund's current plumbing terms. Pass the issuer's SEC CIK as cik.

Convert and extract a public website URL into clean Markdown or readable text plus bounded structured links, canonical and heading signals, Schema.org types, redirect evidence, content hashes, and response provenance for RAG, research, or agent context.

Get weather observations (METAR) for a specific airport

EU financial authorisations in five official registers, by name or LEI: ESMA Registers (MiFID entities, EU/EEA: status, authority, dates), the ECB list of supervised entities (banking union: significant banks under direct ECB supervision, less significant under national authorities, group, monthly changes), ESMA benchmark administrators and money market funds (fund, manager, status), EIOPA pension institutions (IORP). One integration for the single market; data free at the sources.

Single live pass-through call to the EU Commission's VIES (VAT Information Exchange System) confirming whether an EU VAT registration number is currently valid, with registered name/address when available. Every call is a real-time confirmation only -- never a cached, stored, or aggregated result -- matching VIES's own stated purpose (real-time confirmation of VAT number validity per Council Regulation (EC) No. 904/2010) and how existing commercial VIES-based products already operate.

Search open Crossref bibliographic metadata by title, author, DOI fragment, or citation and return bounded normalized publication, author, citation, license, and update metadata without abstracts or full text.

Find source-linked scientific papers by topic. Returns metadata pointers, authors, dates, licence evidence when supplied by the source, and corpus provenance; it does not sell paper text or infer reuse rights.

LONG Events events API: global electronic-music event discovery with structured artists. Actions: discover, list, stats, catalog_stats, spotlight_candidates, get_sets, get_now_playing, get_schedule, search_artists, get_artist, get_artist_events, list_artists. Artist-action identity objects include nullable mbid and verified spotify_id; artist event payloads include the resolved closest-to-purchase ticket_url.

Search Obelisk's curated spy ad catalog when you need competitor creative examples by keyword, brand, or platform. Returns JSON ad cards. Use limit=1 for a cheap first call.

US Spot ETF Net Flows — The total net fund flow of the leading U.S.-listed spot Crypto ETFs, reflecting day-to-day changes in their holdings. Covers major Bitcoin ETFs (e.g. IBIT, GBTC, FBTC, ARKB, BITB) and Ethereum ETFs (e.g. ETHA, ETHE, FETH, ETHV, QETH) from issuers such as BlackRock, Grayscale, Fidelity, Bitwise, and VanEck. Data by Glassnode.

ERC20 and native ETH wallet balance on Base or Ethereum mainnet, for a 0x address or an ENS name. decimals() and symbol() are read from the contract at request time rather than assumed, because assuming 18 reports a USDC balance a trillion times too large. Use when you need to answer: What does this EVM address hold? ENS is resolved through two independent resolvers and the answer is used only…

Topic ranking. Ranked social topics for a window. Returns topics + window_hours.

Exa — semantic web search via our API key. numResults up to 100. For people/lead discovery set category:"people" with an open ICP query.

Base gas price (chain 8453) in BOTH gwei and wei, with base fee, priority fee and block number when the node supplies them. Use when you need to answer: What is gas on Base? Both units are returned because a caller asking in wei and a caller asking in gwei are asking the same question. Served from keyless public RPC with three-node fallback, so there is no API key to rotate or expire.

Base tx receipt + decoded calldata (?tx=0x...)

Scan supplied code with transparent deterministic rules for common secret, injection, shell, weak-hash, and Solidity risks. This is not a professional audit.

SwapHunt — a crypto market-context toolkit for trading agents: live prices, market regime, volatility, sentiment, funding, macro events, seasonality and anti-FOMO sanity checks, all pay-per-call. This route returns a single asset's live spot price with 24h context: price, 24h change %, 24h high/low and volume — one clean JSON snapshot (BTC, ETH, SOL, any major). For many assets at once use /price/multi.