{
  "total": 2,
  "source": "d1",
  "tracking_since": "2026-10-25T12:38:37.716Z",
  "source_rechecks": {
    "rows": 332,
    "series": 250,
    "last_checked_at": "2026-10-25T13:38:37.000Z",
    "latest_result_counts": {
      "confirmed": 240,
      "unreachable": 5,
      "needs_review": 4,
      "changed": 1
    },
    "method": "Each source URL is fetched and the recorded numbers are looked for in the page (PDFs via pdftotext); anything not confirmed is reviewed by a human. Log: /downloads/price_rechecks.jsonl"
  },
  "observations": [
    {
      "id": "po_20261025_36b33ce50a50",
      "series_key": "ps_0680d37a68ce8874",
      "kind": "benchmark",
      "use_case_id": "tank-inspection",
      "use_case_ids": [
        "tank-inspection"
      ],
      "provider_id": null,
      "description": "Drone inspection campaign of several tanks on one depot, coordinated with HSE (C-DRONE price guide, France, observed 2026 range, excl. VAT)",
      "low": 1300,
      "high": 3500,
      "currency": "EUR",
      "unit": "per depot",
      "region": "FR",
      "source_url": "https://c-drone.fr/en/guides/storage-tank-hydrocarbon-drone-inspection-atex-price/",
      "as_of": "2026-09-22",
      "observed_at": "2026-10-25T20:26:06.955Z",
      "content_hash": "sha256:36b33ce50a509768c2075d361a2371b6f4905a4bdfe9a82fcd1257fa7971b92c",
      "supersedes": null,
      "origin": "build",
      "change_reason": null,
      "current": true,
      "usd": {
        "currency": "USD",
        "low": 1455,
        "high": 3918,
        "fx": {
          "pair": "EUR/USD",
          "rate": 1.11929,
          "eur_per_usd": 0.89342,
          "rate_date": "2026-10-23",
          "source": "European Central Bank reference rates via Frankfurter",
          "source_url": "https://api.frankfurter.dev/v1/latest?base=USD"
        },
        "note": "Converted at the published reference rate on 2026-10-23, not at the price's as_of date. Indicative only."
      }
    },
    {
      "id": "po_20261025_57c3ee0797ca",
      "series_key": "ps_0c781994e9869af4",
      "kind": "benchmark",
      "use_case_id": "tank-inspection",
      "use_case_ids": [
        "tank-inspection"
      ],
      "provider_id": null,
      "description": "Drone external visual inspection of one hydrocarbon storage tank (shell + roof, geolocated photo report) (C-DRONE price guide, France, observed 2026 range, excl. VAT)",
      "low": 600,
      "high": 1300,
      "currency": "EUR",
      "unit": "per tank",
      "region": "FR",
      "source_url": "https://c-drone.fr/en/guides/storage-tank-hydrocarbon-drone-inspection-atex-price/",
      "as_of": "2026-09-22",
      "observed_at": "2026-10-25T20:26:06.955Z",
      "content_hash": "sha256:57c3ee0797ca263f48f585ac53a4cf5a0c4682213ace9417032e9c4ffd613a8f",
      "supersedes": null,
      "origin": "build",
      "change_reason": null,
      "current": true,
      "usd": {
        "currency": "USD",
        "low": 672,
        "high": 1455,
        "fx": {
          "pair": "EUR/USD",
          "rate": 1.11929,
          "eur_per_usd": 0.89342,
          "rate_date": "2026-10-23",
          "source": "European Central Bank reference rates via Frankfurter",
          "source_url": "https://api.frankfurter.dev/v1/latest?base=USD"
        },
        "note": "Converted at the published reference rate on 2026-10-23, not at the price's as_of date. Indicative only."
      }
    }
  ],
  "series": [
    {
      "series_key": "ps_0680d37a68ce8874",
      "kind": "benchmark",
      "use_case_id": "tank-inspection",
      "provider_id": null,
      "description": "Drone inspection campaign of several tanks on one depot, coordinated with HSE (C-DRONE price guide, France, observed 2026 range, excl. VAT)",
      "currency": "EUR",
      "unit": "per depot",
      "region": "FR",
      "source_url": "https://c-drone.fr/en/guides/storage-tank-hydrocarbon-drone-inspection-atex-price/",
      "observations": 1,
      "first_observed_at": "2026-10-25T20:26:06.955Z",
      "last_observed_at": "2026-10-25T20:26:06.955Z",
      "current": true,
      "latest": {
        "low": 1300,
        "high": 3500,
        "as_of": "2026-09-22",
        "id": "po_20261025_36b33ce50a50"
      },
      "trend": null,
      "last_rechecked": null
    },
    {
      "series_key": "ps_0c781994e9869af4",
      "kind": "benchmark",
      "use_case_id": "tank-inspection",
      "provider_id": null,
      "description": "Drone external visual inspection of one hydrocarbon storage tank (shell + roof, geolocated photo report) (C-DRONE price guide, France, observed 2026 range, excl. VAT)",
      "currency": "EUR",
      "unit": "per tank",
      "region": "FR",
      "source_url": "https://c-drone.fr/en/guides/storage-tank-hydrocarbon-drone-inspection-atex-price/",
      "observations": 1,
      "first_observed_at": "2026-10-25T20:26:06.955Z",
      "last_observed_at": "2026-10-25T20:26:06.955Z",
      "current": true,
      "latest": {
        "low": 600,
        "high": 1300,
        "as_of": "2026-09-22",
        "id": "po_20261025_57c3ee0797ca"
      },
      "trend": null,
      "last_rechecked": null
    }
  ],
  "note": "Only one observation per series so far: we started recording every price on 2026-10-25 and re-check every source on a schedule. A trend appears when a re-checked source shows a different price (we never overwrite old observations).",
  "pagination": {
    "total": 2,
    "limit": 200,
    "offset": 0,
    "returned": 2,
    "next_offset": null,
    "next": null,
    "prev": null
  },
  "license": "Whirrwork (https://whirrwork.com), CC BY 4.0"
}