Add-on, the official ruler

Endpoints (27 live)

• GET /gauge/region — [3-LEG] Local three-leg environment chain, one location (?loc=): leading air quality (AQI) -> current precipitation, rain and 30-day dry-wet -> realized nearest river stage and streamflow (confirmation gate). A chain, not one reading: confidence = how many legs are lit, in order. Sources: EPA/CAMS, ERA5, USGS. Descriptive only, never a forecast or advice. No data -> 422 no_charge, not billed. $0.25 per call. (0.25 USDC on Base)
• GET /gauge/precip — Add-on, precipitation for one location: daily rainfall plus 30-day accumulated wet-dry drought context from ERA5. Descriptive only, never a forecast or advice. No data -> 422 no_charge, not billed. Every record carries an offline-recomputable record_hash. $0.0050 per call. (0.005 USDC on Base)
• GET /gauge/nas-region — [3-LEG] Aviation ground-stop chain, one airport (?entity=ewr): leading aviation weather - METAR ceiling, visibility, convection and gusts -> current FAA NAS ground stops and delay programs -> realized delay (confirmation gate). A chain, not one reading: confidence = how many legs are lit, in order. Sources: FAA NAS Status, NWS METAR. Descriptive only, never a forecast or advice. No data -> 422 no_charge, not billed. $0.25 per call. (0.25 USDC on Base)
• GET /gauge/hurricane-region — [3-LEG] Hurricane chain, one basin (?entity=atlantic|epacific|cpacific): leading NHC official 2/7-day genesis probability (NHC-quoted, not our forecast) -> current active storms - category, wind, pressure, position -> realized official watches, warnings, landfall (confirmation gate). A chain, not one reading: confidence = how many legs are lit, in order. Sources: NOAA NHC. Descriptive only, never a forecast or advice. No data -> 422 no_charge, not billed. $0.25 per call. (0.25 USDC on Base)
• GET /gauge/grid-reliability-region — [3-LEG] Grid reliability chain, one balancing authority (?entity=us-ercot): leading EIA-930 day-ahead demand forecast approaching recent peak, about one day of lead -> current current demand against capacity tightness -> realized reserve and interchange response (confirmation gate). A chain, not one reading: confidence = how many legs are lit, in order. Sources: US EIA-930. Descriptive only, never a forecast or advice. No data -> 422 no_charge, not billed. $0.25 per call. (0.25 USDC on Base)
• GET /gauge/grid-region — [3-LEG] Power-grid chain, one grid region (?loc=us-ercot): leading demand pressure from heating and cooling degree days -> current renewable availability, solar and wind -> realized energy inflation (CPI energy year-over-year) and gas price (confirmation gate). A chain, not one reading: confidence = how many legs are lit, in order. Sources: EIA, BLS, Open-Meteo. Descriptive only, never a forecast or advice. No data -> 422 no_charge, not billed. $0.25 per call. (0.25 USDC on Base)
• GET /gauge/filing-company — [3-LEG] Regulatory filing chain, one issuer (?entity=AMC): leading NT late-filing notices, a distress leading indicator -> current 8-K material events graded by item severity -> realized Form 4 insider transactions (confirmation gate). A chain, not one reading: confidence = how many legs are lit, in order. Sources: SEC EDGAR. Descriptive only, never a forecast or advice. No data -> 422 no_charge, not billed. $0.25 per call. (0.25 USDC on Base)
• GET /gauge/earthquake-region — [3-LEG] Seismic activity chain, one seismic zone (?entity=california-san-andreas): leading swarm rate, USGS micro-event rate rising - DESCRIPTIVE and explicitly not a prediction -> current current max magnitude and count -> realized felt and impact reports (confirmation gate). A chain, not one reading: confidence = how many legs are lit, in order. Sources: USGS. Descriptive only, never a forecast or advice. No data -> 422 no_charge, not billed. $0.25 per call. (0.25 USDC on Base)
• GET /gauge/drug-shortage-region — [3-LEG] Drug shortage chain, one therapeutic class (?entity=oncology): leading new-shortage incidence from openFDA new listings, which leads the burden peak -> current current active shortages in the class -> realized resolution rate (confirmation gate). A chain, not one reading: confidence = how many legs are lit, in order. Sources: openFDA. Descriptive only, never a forecast or advice. No data -> 422 no_charge, not billed. $0.25 per call. (0.25 USDC on Base)
• GET /gauge/drug-detail-region — [3-LEG] Per-drug shortage chain, one drug (?entity=carboplatin): leading supply narrowing - available labelers against total listed -> current current FDA shortage status per NDC -> realized affected presentations (confirmation gate). A chain, not one reading: confidence = how many legs are lit, in order. Sources: openFDA. Descriptive only, never a forecast or advice. No data -> 422 no_charge, not billed. $0.25 per call. (0.25 USDC on Base)
• GET /gauge/drought-region — [3-LEG] Drought chain, one drought region (?entity=us-california): leading precipitation deficit, soil moisture and snowpack -> current the OFFICIAL US Drought Monitor class and area coverage -> realized streamflow and impact (confirmation gate). A chain, not one reading: confidence = how many legs are lit, in order. Sources: USDM/NDMC, USGS. Descriptive only, never a forecast or advice. No data -> 422 no_charge, not billed. $0.25 per call. (0.25 USDC on Base)
• GET /gauge/border-wait-region — [3-LEG] Land border chain, one crossing (?entity=laredo-world-trade): leading upstream pressure - lead traffic, staffing and inspection intensity -> current current CBP border wait times by lane -> realized commercial freight delay (confirmation gate). A chain, not one reading: confidence = how many legs are lit, in order. Sources: US CBP. Descriptive only, never a forecast or advice. No data -> 422 no_charge, not billed. $0.25 per call. (0.25 USDC on Base)
• GET /gauge/air — Add-on, air quality for one location: US AQI category and PM2.5 reading from EPA and CAMS official feeds. Descriptive only, never a forecast or advice. No data -> 422 no_charge, not billed. Every record carries an offline-recomputable record_hash. $0.0050 per call. (0.005 USDC on Base)
• GET /gauge/agri-region — [3-LEG] Agriculture chain, one grain belt (?loc=us-iowa): leading soil drought (USDM D0-D4) -> current heat stress and growing degree days -> realized crop vigour VHI - did the drought actually reach the crop (confirmation gate). A chain, not one reading: confidence = how many legs are lit, in order. Sources: USDM/NDMC, NASA POWER, NOAA STAR. Descriptive only, never a forecast or advice. No data -> 422 no_charge, not billed. $0.25 per call. (0.25 USDC on Base)
• GET /gauge/wildfire-region — [3-LEG] Wildfire chain, one fire-risk region (?entity=us-california): leading fire weather - hot, dry and windy -> current active fire detections from NASA FIRMS satellite thermal anomalies -> realized downwind smoke impact (confirmation gate). A chain, not one reading: confidence = how many legs are lit, in order. Sources: NASA FIRMS, NWS, EPA. Descriptive only, never a forecast or advice. No data -> 422 no_charge, not billed. $0.25 per call. (0.25 USDC on Base)
• GET /gauge/severe-convection-region — [3-LEG] Severe convection and hail chain, one convective region (?entity=tornado-alley-core): leading SPC Day-1 outlook with CAPE, CIN and shear - hours of lead -> current current storm reports -> realized hail and wind damage reports (confirmation gate). A chain, not one reading: confidence = how many legs are lit, in order. Sources: NOAA SPC. Descriptive only, never a forecast or advice. No data -> 422 no_charge, not billed. $0.25 per call. (0.25 USDC on Base)
• GET /gauge/strata — Add-on, statistical strata: share of the last 5 years spent in each official band for this day-of-year, the percentile bands, and where the current reading falls. Backtestable, and stated as approximate. Descriptive only, never a forecast or advice. No data -> 422 no_charge, not billed. $0.0050 per call. (0.005 USDC on Base)
• GET /gauge/ruler — Add-on, the official ruler: the band and threshold ladder published by the source agency, its classification, and distance-to-action. NOT every line has an official ruler - pure market quotes do not. When it does not, you get 422 with no_charge:true and reason:no-ruler-for-this-line and you are NOT billed. Never a bag of nulls you paid for. Every record carries an offline-recomputable record_hash. $0.0050 per call. (0.005 USDC on Base)
• GET /gauge/history-series — [TIME SERIES EXPORT] Full retained series for one signal and entity (?days=, ?format=json or csv): every snapshot up to days (default 400, cap 1000) with snapshot_date, observed_at, data_age_hours, current, band and record_hash. For research, actuarial and base-rate work. Free 7-snapshot shape preview at /gauge/history-preview. Descriptive only, never a forecast or advice. No data -> 422 no_charge, not billed. $0.09 per call. (0.09 USDC on Base)
• GET /gauge/history — Add-on, historical placement: seasonal percentile for the current point, frequency, the percentile table, and the method and source used to compute them. Descriptive only, never a forecast or advice. No data -> 422 no_charge, not billed. $0.0050 per call. (0.005 USDC on Base)

+7 more endpoints.