gauge derived

{
  "input": {
    "type": "http",
    "method": "GET",
    "example": {
      "entity": "07010000",
      "format": "thin",
      "signal_id": "hydrology.river-level"
    },
    "queryParams": {
      "entity": "required - monitored object id, PAIRED WITH signal_id (e.g. 07010000 for hydrology.river-level, japan for earthquake.cur",
      "signal_id": "required - signal id in genus.species ASCII form (e.g. hydrology.river-level, crypto.spot, macro.unemployment, earthquak"
    },
    "exampleRequest": "/gauge?signal_id=hydrology.river-level&entity=07010000&format=thin"
  },
  "output": {
    "type": "json",
    "example": {
      "grade": "screening-level, not decision-grade",
      "scope": {
        "full": "https://api.truthbear.co/scope/v1",
        "verifiability": "via-endpoint",
        "monitoring_not_forecast": true,
        "intelligence_not_command": true
      },
      "entity": "03255000",
      "nature": "This API supplies data organisation and trend description only. It is not a recommendation to act; the decision is yours. Purely descriptive - no judgement, no prediction.Official source plus record_hash; verify with the free /gauge/verify.",
      "current": {
        "gauge_height_ft": 30.69
      },
      "signal_id": "hydrology.river-level",
      "provenance": {
        "freshness": "fresh",
        "age_hours_now": 23,
        "freshness_basis": "cadence=daily; fresh<=24h; recent<=192h; dead_source>1440h; age_basis=request-time(now minus observed_at)"
      },
      "source_ref": "https://waterdata.usgs.gov/monitoring-location/03255000/",
      "summary_en": "Ohio River at Cincinnati, OH: 30.69 ft gauge height - no flooding, 9.31 ft below the first official alert (action stage 40 ft). seasonal percentile 0.922 (rare). falling vs 24h ago.",
      "entity_name": "Ohio River at Cincinnati, OH",
      "observed_at": "2026-08-25T04:00:00.000Z",
      "record_hash": "sha256:5969b8a147f438254edadf246ed1d7801a77c29babb5d725e17870320d620dd7",
      "record_hash_verifiable": {
        "mode": "via-endpoint",
        "note": "This response is a projected delivery (some core fields are omitted to control size). Cross-check record_hash with the free /gauge/verify, or buy /gauge to get the complete core for offline recomputation."
      }
    }
  }
}