{"source":"https://api.gridrock.ai/mcp","tool":"read_at","scope":"mh36","archetype":"now","cell":{"admin_code":479,"cluster_id":4790000232,"lat":19.365,"lng":76.065},"signals":[{"signal":"temperature","resolved_at":"2026-09-19T00:35:35Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"temperature","unit":"celsius","admin_code":479,"cluster_id":4790000232,"value":{"temperature_c_idw":23.2453},"valid_time":{"kind":"valid_time","requested":"2026-09-19T00:35:35Z","served_window_start_utc":"2026-09-19T00:16:40+00:00","served_window_end_utc":"2026-09-19T01:16:40+00:00","natural_cadence_seconds":3600,"note":"the witness pin whose own natural window brackets `at`; never interpolated, never back-cast (R7)"},"support":{"kind":"imd_idw_station","support_m":null,"detail":{"temperature_c_n_stations":3},"note":"coarse witness support is disclosed; the value is not zoomed below it (§1.7)"},"witness":{"tier":"tier_o_v2","pin_seq":2518,"pin_sha256":"0ed9e06abd77153833c8c3833440ad16681371ef6aedc6b9bdc69cdd7770c7ea","provenance_kind":"upstream-reingest:imd-city-weather-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-09-19T01:16:40+00:00","support_kind":"imd_idw_station","scope":"mh36","note":"value is the witness observed in the pin whose natural window contains the requested instant; outside the observed window read_at refuses (R7) — it never interpolates and never replays a transaction-time cube."},"error":null}},{"signal":"rainfall_imd","resolved_at":"2026-09-19T00:35:35Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"rainfall_imd","unit":"mm_24h","admin_code":479,"cluster_id":4790000232,"value":{"rainfall_mm_24h_idw":3.1542},"valid_time":{"kind":"valid_time","requested":"2026-09-19T00:35:35Z","served_window_start_utc":"2026-09-19T00:16:40+00:00","served_window_end_utc":"2026-09-19T01:16:40+00:00","natural_cadence_seconds":3600,"note":"the witness pin whose own natural window brackets `at`; never interpolated, never back-cast (R7)"},"support":{"kind":"imd_idw_station","support_m":null,"detail":{"rainfall_mm_24h_n_stations":3},"note":"coarse witness support is disclosed; the value is not zoomed below it (§1.7)"},"witness":{"tier":"tier_o_v2","pin_seq":2518,"pin_sha256":"0ed9e06abd77153833c8c3833440ad16681371ef6aedc6b9bdc69cdd7770c7ea","provenance_kind":"upstream-reingest:imd-city-weather-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-09-19T01:16:40+00:00","support_kind":"imd_idw_station","scope":"mh36","note":"value is the witness observed in the pin whose natural window contains the requested instant; outside the observed window read_at refuses (R7) — it never interpolates and never replays a transaction-time cube."},"error":null}},{"signal":"rainfall","resolved_at":"2026-09-19T00:35:35Z","envelope":{"ok":false,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":null,"coverage":null,"error":{"code":"after_observed_window","message":"`at` 2026-09-19T00:35:35Z is after the latest witnessed instant (2026-09-12T03:59:59.999000+00:00); the engine will not back-cast a value it has not yet observed (R7)"}}},{"signal":"aqi","resolved_at":"2026-09-19T05:35:35Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"aqi","unit":"cpcb_per_pollutant","admin_code":479,"cluster_id":4790000232,"value":{"aqi_pm2_5_idw":35.1632,"aqi_pm10_idw":41.2952,"aqi_no2_idw":9.4172,"aqi_so2_idw":5.4823,"aqi_co_idw":28.2503,"aqi_ozone_idw":15.5578},"valid_time":{"kind":"valid_time","requested":"2026-09-19T05:35:35Z","served_window_start_utc":"2026-09-19T05:00:53+00:00","served_window_end_utc":"2026-09-19T06:00:53+00:00","natural_cadence_seconds":3600,"note":"the witness pin whose own natural window brackets `at`; never interpolated, never back-cast (R7)"},"support":{"kind":"cpcb_idw_district","support_m":null,"detail":{"aqi_pm2_5_n_stations":3,"aqi_pm10_n_stations":4,"aqi_no2_n_stations":3,"aqi_so2_n_stations":4,"aqi_co_n_stations":4,"aqi_ozone_n_stations":4},"note":"coarse witness support is disclosed; the value is not zoomed below it (§1.7)"},"witness":{"tier":"tier_m_v1","pin_seq":1742,"pin_sha256":"09f631986736df219af399835dd5953dc4e9e94dc7f506fd859acb3a35a8f772","provenance_kind":"upstream-reingest:cpcb-aqi-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-09-19T06:00:53+00:00","support_kind":"cpcb_idw_district","scope":"mh36","note":"value is the witness observed in the pin whose natural window contains the requested instant; outside the observed window read_at refuses (R7) — it never interpolates and never replays a transaction-time cube."},"error":null}},{"signal":"weather_google","resolved_at":"2026-09-19T05:35:35Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"weather_google","unit":"google_weather_mixed","admin_code":479,"cluster_id":4790000232,"value":{"temperature_c_idw":29.896,"rainfall_mm_24h_idw":2.1073,"humidity_pct_idw":60.4996,"wind_speed_kmph_idw":9.729},"valid_time":{"kind":"valid_time","requested":"2026-09-19T05:35:35Z","served_window_start_utc":"2026-09-19T05:06:41+00:00","served_window_end_utc":"2026-09-19T06:06:41+00:00","natural_cadence_seconds":3600,"note":"the witness pin whose own natural window brackets `at`; never interpolated, never back-cast (R7)"},"support":{"kind":"google_weather_idw_station","support_m":null,"detail":{"temperature_c_n_stations":3,"rainfall_mm_24h_n_stations":3,"humidity_pct_n_stations":3,"wind_speed_kmph_n_stations":3},"note":"coarse witness support is disclosed; the value is not zoomed below it (§1.7)"},"witness":{"tier":"tier_o_google_v1","pin_seq":2264,"pin_sha256":"d7fce3fe4cb6fa82b36a2de490749e5629e1206bf0156b707f3a3aa4ca54964a","provenance_kind":"upstream-reingest:google-weather-cowitness-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-09-19T06:06:41+00:00","support_kind":"google_weather_idw_station","scope":"mh36","note":"value is the witness observed in the pin whose natural window contains the requested instant; outside the observed window read_at refuses (R7) — it never interpolates and never replays a transaction-time cube."},"error":null}}]}