Bitcoin recommended fees real-time from mempool. sat/vByte tiers: fastest, half-hour, hour, economy, minimum. Includes mempool tx count, total size MB, total fee sats, fee histogram. AI agent BTC broadcasting bot, fee estimator API, mempool monitor.

Spot prices in USD per troy ounce for gold XAU, silver XAG, platinum XPT, palladium XPD with latest OHLC from Stooq. AI agent precious-metals tracker, gold-bitcoin ratio analyst, inflation hedge, diversification calculator, macro asset API.

List Kalshi events (groups of related markets): event ticker, title, category and nested markets. Free Kalshi public API.

Live list of everyone currently in space and their craft, with total count. Keyless Open Notify API. For agents reporting current human spaceflight.

Documents currently on public inspection at the US Federal Register, ahead of official publication. Returns titles, agencies, doc numbers, filing details. Keyless Federal Register API. For agents tracking pending rules.

WHOIS registration lookup — registrar, creation/expiry/updated dates, domain age in days, name servers, DNSSEC, registrant country/org, EPP status codes. All TLDs (.com .net .org .io .dev .ai ccTLDs gTLDs). Per-field error resilience for TLD-specific parsing quirks. No WHOIS library setup or TLD-specific parsing needed. Accepts USDC payments on Base and Solana

Freshly launched Polymarket markets, newest first: question, outcomes, start date, volume. Catch new prediction markets early. Free Polymarket Gamma data.

List Polymarket category tags (id + label) used to filter markets by category (politics, crypto, sports, pop-culture). Free Polymarket Gamma data.

All model years available in the US EPA/DOE FuelEconomy.gov vehicle database. Returns selectable year values. Keyless FuelEconomy.gov. For agents building vehicle MPG and emissions lookups.

Smart-money wallet leaderboard from our tracker: eligible wallets ranked by skill score then 90d PnL. address, tier, score, win rate, 90d/realized PnL, profit factor, holding time. chain=base|solana. In-house scoring data.

List Kalshi prediction markets: ticker, title, yes/no bid + ask, last price, volume and open interest. The US-regulated event-contract board. Free Kalshi public API.

Top active Polymarket markets ranked by volume right now: question, outcome prices (implied probability), 24h volume, liquidity. The trending prediction-market board. Free Polymarket Gamma data.

Average interest rates on US Treasury securities (bills, notes, bonds, TIPS, FRNs) from official Treasury FiscalData, latest first: security type, rate, and record date. For AI agents tracking federal debt cost, yields, and macro rate trends.

Query the openFDA Tobacco Problem Reports dataset by search expression, no key, US FDA public data. Returns matching records with structured fields. For AI agents in pharma, device, and safety research.

Reverse-geocode lat/lon to country, state, city, locality and postcode via keyless BigDataCloud. Returns ISO codes and admin hierarchy. For agents turning coordinates into human-readable place names.

Current local time at a lat/lon coordinate via keyless TimeAPI (auto-resolves timezone). Returns ISO date-time, weekday, timezone and DST flag. For agents that only have coordinates, not zone names.

Query the openFDA drug recalls dataset by search expression, no key, US FDA public data. Returns matching records with structured fields. For AI agents in pharma, health, and safety research.

The list of IANA timezones supported by TimeAPI.io, no key. Returns timezone names. For AI agents validating timezone input and building pickers.

Total US public debt outstanding to the penny from official Treasury FiscalData, latest record: total debt, debt held by public, intragovernmental holdings, record date. For AI agents tracking the debt ceiling, fiscal trajectory, and macro risk.

The list of recipe categories from TheMealDB, no key. Returns category names, thumbnails, and descriptions. For AI agents building food navigation.