[TIME SERIES EXPORT] Full retained series for one signal and entity (?days=, ?fo

[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.

Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.

Endpoint

GET https://api.truthbear.co/gauge/history-series

Our checks, last 30 days

Example input (from the provider)

{
  "example": {
    "entity": "07010000",
    "signal_id": "hydrology.river-level"
  },
  "exampleRequest": "/gauge/history-series?signal_id=hydrology.river-level&entity=07010000",
  "method": "GET",
  "queryParams": {
    "days": "optional - lookback window in days; default 400, minimum 1, capped at 1000. Windows are UTC days (snapshot_date), not lo",
    "entity": "required - object id within that line, e.g. 07010000 (see /gauge/coverage)",
    "format": "optional - json (default) or csv",
    "signal_id": "required - line id, e.g. hydrology.river-level (see /gauge/coverage)"
  },
  "type": "http"
}

Promised output schema (from the provider)

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "input": {
      "properties": {
        "method": {
          "enum": [
            "GET"
          ],
          "type": "string"
        },
        "queryParams": {
          "additionalProperties": false,
          "properties": {
            "days": {
              "description": "optional - lookback window in days; default 400, minimum 1, capped at 1000. Windows are UTC days (snapshot_date), not local days",
              "type": "string"
            },
            "entity": {
              "description": "required - object id within that line, e.g. 07010000 (see /gauge/coverage)",
              "examples": [
                "07010000"
              ],
              "type": "string"
            },
            "format": {
              "description": "optional - json (default) or csv",
              "type": "string"
            },
            "signal_id": {
              "description": "required - line id, e.g. hydrology.river-level (see /gauge/coverage)",
              "examples": [
                "hydrology.river-level"
              ],
              "type": "string"
            }
          },
          "required": [
            "signal_id",
            "entity"
          ],
          "type": "object"
        },
        "type": {
          "const": "http"
        }
      },
      "required": [
        "type",
        "method",
        "queryParams"
      ],
      "type": "object"
    },
    "output": {
      "properties": {
        "type": {
          "const": "json"
        }
      },
      "required": [
        "type"
      ],
      "type": "object"
    }
  }
}

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