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Resolve an album/release from MusicBrainz (CC0). Pass a barcode (UPC/EAN), or artist + album, or a free-text query. Returns ranked releases with MusicBrainz ID (MBID), title, primary artist, release date, country, barcode, status, track count, label, and catalog number. Keyless, public-domain core data. Barcode → album is the differentiated lookup (resolve a physical product to its metadata).

Current EU VAT rates by member state — standard rate plus reduced/super-reduced/parking/zero rates. Pass `country` (ISO 2-letter; Greece is EL) for one state, or omit it for all 27. Each result returns the standard rate, the list of reduced rates in force, every rate category with its percentage, and the date the rates are in force. Source: European Commission TEDB (Taxes in Europe Database), refreshed regularly. Pairs with tax.vat (which validates a specific VAT number against the live VIES register).

GitHub repository metadata: full name, owner, description, stars, forks, watchers, open issues, primary language, topics, SPDX license, default branch, homepage, archived flag, and created/updated/pushed timestamps. Read-only; no GitHub key needed by the caller.

List pull requests for a repository: number, title, state, author, draft flag, merged status + time, head/base branch, and created time. Filter by state (open/closed/all); paginate. Read-only; no caller key needed.

Top contributors to a repository, ranked by commit count: login, contributions, account type, and profile URL. Read-only; no caller key needed.

IPO calendar — companies going public (or recently public) in a date window, with the expected date, symbol, name, exchange, price range, number of shares, total offering value, and status (expected/priced/filed/withdrawn). Pass a from/to window (YYYY-MM-DD; defaults to a ±30-day span around today). Data by Finnhub.

UK Food Standards Agency food hygiene ratings (FHRS) for an establishment. Search by business name and/or postcode and get matching establishments with their hygiene rating (0-5 in England/Wales/NI; Pass / Improvement Required in Scotland), rating date, the three component scores (hygiene, structural, confidence in management — lower is better), business type, local authority, full address + postcode, and geocode. Free, Open Government Licence (commercial use permitted). Authoritative inspection data an LLM cannot recall — for food, hospitality, and consumer-safety agents.

Look up world ports and terminals in the NGA World Port Index (Pub 150, ~2,950 ports) by port name (partial match) and/or country (full country name, e.g. "Japan"). Returns matching ports with location (lat/lon, country, region), UN/LOCODE, harbor size/type and shelter, max vessel length/draft (meters), channel/anchorage/cargo-pier depths, tidal range, and chart number. Keyless, public-domain (NGA). Physical-port reference data an LLM cannot reliably recall; complements maritime.vessel (USCG vessel registry) and maritime.cases (port-state-control inspections).

US Drought Monitor severity for a county (5-digit FIPS) or state (2-letter code). Returns the weekly percent of area in each drought category — None, D0 (Abnormally Dry), D1 (Moderate), D2 (Severe), D3 (Extreme), D4 (Exceptional) — newest week first, plus the worst category present each week. Keyless, public-domain (NDMC/USDA/NOAA). This is the official metric behind USDA disaster-program eligibility; use for crop-risk, water, and insurance reasoning.

Branches of a repository: name, head commit sha, and protection flag. Read-only; no caller key needed.

Modern WHOIS via RDAP. Query: domain (e.g. example.com). Returns { domain, ldhName, handle, registrar:{ name, ianaId, url, abuseEmail, abusePhone }, registeredAt, expiresAt, updatedAt, statuses (camelCase ICANN EPP codes), nameservers[], dnssecSigned, rdapUrl }. GDPR: registrant personal data is generally redacted upstream and not returned. Some TLDs without RDAP are not supported and return 404 TLD_NOT_SUPPORTED.

Map a US latitude/longitude to its FCC spectrum-licensing geographies — Cellular Market Area (CMA), Basic Trading Area (BTA), Major Trading Area (MTA), Partial Economic Area (PEA), and the BEA/EAG/MEA/REAG economic areas — plus the 2020 Census block FIPS, county, and block population. Keyless, public-domain (FCC). These market areas define spectrum-license boundaries (which CMA/BTA/PEA a point falls in) — distinct from ordinary geocoding, and not derivable by an LLM.

Occupations related to a given O*NET occupation (career-adjacent roles), by SOC / O*NET-SOC code. Returns ranked related occupations with code + title. CC-BY (O*NET). For career-pathing, "adjacent roles", and transferable-skills reasoning.

List issues for a repository (pull requests excluded): number, title, state, author, labels, comment count, and created/updated times. Filter by state (open/closed/all) and labels; paginate. Read-only; no caller key needed.

A single Kalshi market by ticker. Returns yes/no bid+ask and last price (dollars, implied probability), volume, liquidity, open interest, open/close times, and settled result. Read-only (no Kalshi key needed).

Ground-truth soil profile for any US latitude/longitude from the USDA-NRCS SSURGO survey (Soil Data Access). Returns the soil map unit plus its component soil types ranked by composition percent, each with taxonomic order/class, drainage class, hydrologic group, and representative slope. Keyless, public-domain. Use for agronomy, land assessment, hydrology, septic/foundation suitability, and crop-fit reasoning. Coordinates over water or outside surveyed areas return an empty component list.

Authoritative MITRE CWE (Common Weakness Enumeration) lookup. Pass id (e.g. CWE-79, or just 79) for the canonical weakness — name, abstraction, description, extended description, ChildOf/ParentOf relationships (with names), and mapped CAPEC attack patterns (with names) — or query for a keyword search returning ranked matches. Bundled catalog (~970 weaknesses), zero external calls. Agents hallucinate CWE IDs and names constantly; this returns exact, citeable, version-pinned data. Pairs with security.cve (which returns CWE ids) and security.capec.

Stock-exchange holiday calendar. Pass exchange (default US); returns the list of upcoming market holidays with the date, holiday name, whether the session is a full close or an early close, and the trading hours when partial. Use it to plan around non-trading days. Data by Finnhub.

Order book for a Kalshi market by ticker: resting yes and no bids with price (dollars) and size (contracts). Optional depth. Read-only (no Kalshi key needed).

Validate a cryptocurrency address with full checksum verification (not just regex). Returns {chain, address, valid, canonical, format, reason}. Chains: btc (P2PKH, P2SH, Bech32 SegWit v0, Taproot Bech32m), eth (full EIP-55 checksum; non-checksummed flagged), sol (Ed25519 32-byte Base58), ltc (Base58Check L.../M.../3... + ltc1 Bech32), trx (T-prefix Base58Check 0x41), xrp (r-prefix custom Base58), bch (legacy Base58Check + bitcoincash:q... CashAddr). Catches typos via cryptographic checksum; canonical field returns the checksummed/lowercased form.

Compute a loan or mortgage amortization schedule. Pass principal, annualRatePct (e.g. 6.5), and the term as termMonths or termYears; optional extraMonthly adds extra principal each month (shortening the term). Returns the fixed monthly payment, total interest, total paid, the actual payoff month count, and the full month-by-month schedule (each row: payment, principal, interest, remaining balance). Handles the 0% case and trims the final payment exactly. Deterministic — the ground-truth answer for a loan/mortgage/auto-finance question instead of an LLM approximating compound interest. No external calls.

Search GitHub repositories with the full query syntax (e.g. 'x402 language:typescript stars:>100'). Sort by stars/forks/updated. Returns total match count + repos with stars, language, topics, license, timestamps. Read-only; no caller key needed.

US work-visa (H-1B and related) applications filed by a public company, sourced from Department of Labor LCA disclosures. Pass ticker and optionally a from/to window (YYYY-MM-DD; defaults to ~2 years); returns each application with job title, SOC code, visa class, case status, wage range, worksite city/state, employment dates, and case number. Use it as a hiring/headcount signal. Data by Finnhub.

USPTO patent activity associated with a public company. Pass ticker and optionally a from/to window (YYYY-MM-DD; defaults to ~2 years); returns each record with the application number, patent number (when granted), the filing company name(s), description/title, patent type, filing status, filing and publication dates, and a document URL. A company-level innovation/R&D signal (distinct from our keyword patent search). Data by Finnhub.