List all GAUGE signals — hydrology (river level/streamflow), air quality (AQI/PM2.5), precipitation/drought, agriculture (drought/heat/crop VHI), power grid (demand/renewables/energy inflation), shipping (route disruption/sea state/AIS throughput), regulatory filing (8-K/late filing/insider) — with the entities you can query. Free, no payment.

GAUGE coverage counts, à-la-carte pricing menu, and the lists of region/company bundles (regions, agri_regions, grid_regions, shipping_regions, filing_watchlist). Use this to discover what to buy. Free.

A free full sample GAUGE record — shows exactly what a paid response contains: current reading vs official thresholds (band, distance-to-action), seasonal statistical anomaly (percentile/strata), sources + record_hash provenance. Try before you buy.

Free raw US river reading (gage height / streamflow) for a USGS site id — current/previous/change/trend/sources/record_hash. No payment. Example site 07010000 = Mississippi at St. Louis.

Verifiable flood-risk / anomaly record for one signal+entity: current vs official USGS/NOAA/EPA/CAMS thresholds (band, distance-to-action) + 5yr seasonal anomaly (percentile/strata) + record_hash. Costs $0.05 USDC on Base via x402. Works for hydrology/air/precip signals.

Three-leg region bundle for a US city: air quality + precipitation + nearby river, with cross-line corroboration narrative. Costs $0.10 USDC on Base. loc e.g. us-stlouis, us-chicago (see gauge_preview regions).

Agriculture triangle for a grain region: agricultural drought (soil moisture vs official USDM D0–D4) + heat/GDD + crop vegetation health (NOAA satellite VHI) + cross-validation (has drought hit the crop canopy). For ag traders & crop insurers. Costs $0.10 USDC on Base. loc e.g. us-iowa, ar-pampas, ua-ukraine.

Power grid triangle for a grid region: electricity demand pressure (temperature HDD/CDD load proxy) + renewable resource (solar/wind) + energy inflation (US CPI Energy YoY) / natural gas price + cross-validation (high demand × low renewables = grid squeeze → energy inflation). For power/energy & macro/inflation traders, utilities. Costs $0.10 USDC on Base. loc e.g. us-ercot, us-caiso, eu-germany.

Shipping/port triangle for a chokepoint: logistics-flow disruption (WMO sea state + wind vs operational thresholds) + sea-state cause (wave decomposition: local-storm vs distant-swell) + live AIS vessel throughput (waiting vs transiting + congestion) + cross-validation. For shipping lines, commodity/freight traders, ports, marine insurers. Costs $0.10 USDC on Base. loc e.g. malacca, suez-redsea, hormuz, channel.

Regulatory-filing triangle for a company: 8-K material events (item severity — bankruptcy/default/restatement/delisting = critical) + NT late-filing delinquency (distress leading indicator) + Form 4 insider net open-market buy/sell + cross-validation (do insiders confirm the distress by selling or contradict it by buying). All official SEC EDGAR. For event-driven/activist/short funds, quant funds, credit & distressed analysts. Costs $0.10 USDC on Base. entity = ticker e.g. AMC, CVNA, GME.