Cross-venue equivalent-market pairs for arbitrage / relative-value spotting. We fuzzy-match open Polymarket vs Kalshi markets by title-token overlap and return candidate pairs with both venues' YES prices and the implied-probability spread (Polymarket YES minus Kalshi YES). Tune with minScore (0-1 title-similarity floor) and limit. Heuristic — a high score is a strong candidate, not a guaranteed identical contract. Read-only, keyless. No public source maps these directly; the pairing is derived by 2s.io.

Corporate ownership graph for a legal entity by LEI (GLEIF Level-2 relationships, live). Returns the direct parent and ultimate parent (each: LEI, legal name, jurisdiction, country, status), the direct children (paged), and total counts of direct and ultimate children. The authoritative 'who owns whom' lookup for KYB, beneficial-ownership, and corporate-tree mapping — complements business.lei (entity reference) and business.lei-isins.

Transaction history for an Ethereum address (via Etherscan V2). Returns normal transactions newest-first: hash, block, timestamp, from/to, value (wei + ETH), gas used, gas price, decoded method id + function name, error flag, and any contract created. Paginate with page + offset; bound with startBlock/endBlock. Defaults to Ethereum mainnet; other EVM chains are reachable by chainId where upstream coverage allows. Net-new vs crypto.tx (single-hash receipt).

Polymarket smart-wallet leaderboard: top traders ranked by realized volume or profit (P&L). Choose the time window (1d/7d/30d/all) and rankBy (vol/pnl); cap with limit. Each entry returns rank, wallet (proxy) address, trader name, X handle, verified badge, total USD volume, and USD P&L — for tracking smart money. Pair the wallet with predict.positions / predict.activity / predict.wallet. Read-only from Polymarket's Data API.

Live ERC-721 NFT read (Base, Ethereum, Polygon, Arbitrum, Optimism; keyless). Given a contract + tokenId: returns current owner, collection name/symbol, and tokenURI (IPFS auto-resolved to a gateway URL). Pass metadata=1 to also fetch and normalize the token's JSON metadata (name, description, image, attributes). For NFT provenance, ownership checks, and gallery rendering.

NFL games from balldontlie — schedule and scores in one feed. Filter by season, week, and/or team id. Each game: date, season, week, status, postseason flag, venue, recap summary, home/visitor teams and final (or live) scores. Cursor-paginated (pass meta.cursor as cursor to continue).

Live native + ERC-20 token balances for an EVM address (Base, Ethereum, Polygon, Arbitrum, Optimism; keyless). Returns the native-coin balance and, for any ERC-20 contract addresses you pass, the symbol, decimals, raw and human-formatted balance — fetched in one multicall. For wallet dashboards, treasury checks, and agent payment/settlement flows.

ISIN ↔ LEI mapping (GLEIF, live, CC0). Two modes: pass lei to list every ISIN (security identifier) issued by that entity; or pass isin to resolve the issuer's LEI (with legal name, jurisdiction, country). Bridges securities to their legal-entity issuers for finance, compliance, and reference-data joins — complements business.lei and business.lei-hierarchy.

NFL teams from balldontlie — all 32 franchises with id, full name, abbreviation, conference (AFC/NFC), division, and city. Pass an optional team id to fetch a single team.

Annual international merchandise-trade flows from UN Comtrade (HS classification). Pass reporter (the country whose trade you want; ISO-2/ISO-3 like 'US'/'USA', a UN M49 number, or 'World'), optional partner (counterparty; default World), year (YYYY), flow (export|import), and commodity: 'TOTAL' (all goods, default), a specific HS code ('27', '8703'), or 'AG2'/'AG4'/'AG6' for a top-commodity breakdown at the 2/4/6-digit level. Returns trade value (USD), net weight, quantity, and the HS commodity, sorted by value. Country names are resolved from Comtrade's own reference data.

Polymarket crypto up-or-down markets — the recurring 'Will <asset> be up or down by <time>?' series for BTC, ETH, SOL, SPX and more (hourly/daily). Each event returns its question, dates, USD volume, and the nested Up/Down markets with live outcome prices (implied probability the asset closes higher). Filter count with limit. Read-only mirror of Polymarket's up-or-down tag.

Resolve a hostname over public DNS and return parsed records. Query: host (required FQDN), types (comma-separated: A,AAAA,MX,TXT,NS,CAA,SRV,CNAME,PTR,SOA — default A,AAAA,MX,TXT,NS), resolver (cloudflare|google|quad9|opendns, optional). Returns one normalized JSON shape per record type with per-type error pass-through. Reserved/local TLDs (.local, .internal, .invalid, .test, localhost) are rejected. 4s per-query timeout.

NFL players from balldontlie — search by name and page through results. Each player: id, name, position, height, weight, jersey number, college, experience, age, and current team. Cursor-paginated (pass meta.cursor as cursor to continue).

Unspent transaction outputs (UTXOs) for a Bitcoin address (free/keyless): each with txid, output index, value (sats + BTC), confirmation status, and block height. Sorted largest-first. For coin selection, balance verification, and wallet tooling.

Real-time water data from USGS NWIS stream / river / groundwater gauges within a bounding box around lat/lon. Returns each site's latest reading per requested variable: streamflow (00060, ft³/s), gage height (00065, ft), water temperature (00010, °C), precipitation (00045, in), and others. Each reading: site code + name, lat/lon, variable name + description + unit, value (or null if no data / sentinel), qualifier codes (e.g., 'P' = provisional, 'A' = approved), observed timestamp. Free public-domain data from waterservices.usgs.gov.

NBA players from balldontlie — search by name and page through results. Each player: id, name, position, height, weight, jersey number, college, country, draft year, and current team. Cursor-paginated (pass meta.cursor as cursor to continue).

Centralized-exchange 24h ticker for a spot pair (e.g. BTC-USD), free/keyless: current price, best bid/ask, 24h open/high/low, 24h + 30d volume, and 24h percent change. Real CEX spot quote — distinct from crypto.token-price (CoinGecko aggregate).

CISA Industrial Control Systems (ICS) advisories — vulnerabilities in operational-technology gear (SCADA, PLCs, building automation, energy/manufacturing/transportation systems, and medical devices), from the official CISA advisory RSS feed. Each item is normalized to the canonical advisory id (ICSA-YY-DDD-NN, or ICSMA-YY-DDD-NN for medical), title, link to the full advisory, publication date (ISO), and a plain-text summary. Optionally filter by keyword (e.g. a vendor like "Siemens") and cap the count. Returned newest-first. Free, public-domain (CISA).

NBA games from balldontlie — schedule and scores in one feed. Filter by season (start year), a single date, and/or team id. Each game: date, season, status, postseason flag, home/visitor teams and final (or live) scores. Cursor-paginated (pass meta.cursor as cursor to continue).

Resolve a bank / financial institution across identifier systems. Give exactly one of bic (SWIFT/BIC), lei, or fdic_cert and get the others back: LEI, every ISO 9362 BIC the institution registers, the FDIC institution record (when matched), jurisdiction, and a canonical name. The BIC<->LEI bridge is authoritative and live from GLEIF (the LEI record carries the institution BIC list, CC0); anchoring on an FDIC certificate returns the FDIC BankFind record and best-effort name-matches it to a GLEIF LEI (flagged via bridge). There is no free FDIC-cert<->BIC table, so the FDIC<->GLEIF link is name-match only -- per-source status + bridge make any partial resolve explicit. Sources: GLEIF (CC0) + FDIC BankFind (US public domain).