{"source":"https://api.gridrock.ai/mcp","tool":"read_at","scope":"mh36","archetype":"now","cell":{"admin_code":472,"cluster_id":4720003587,"lat":20.425,"lng":76.585},"signals":[{"signal":"temperature","resolved_at":"2026-09-09T19:23:50Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"temperature","unit":"celsius","admin_code":472,"cluster_id":4720003587,"value":{"temperature_c_idw":28.7882},"valid_time":{"kind":"valid_time","requested":"2026-09-09T19:23:50Z","served_window_start_utc":"2026-09-09T19:16:40+00:00","served_window_end_utc":"2026-09-09T20:16:40+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":2},"note":"coarse witness support is disclosed; the value is not zoomed below it (§1.7)"},"witness":{"tier":"tier_o_v2","pin_seq":2298,"pin_sha256":"8a543982154279f28b06b8e863e763deb213b005fd0ebb21cb594bfde4522d0a","provenance_kind":"upstream-reingest:imd-city-weather-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-09-09T20:16:40+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":"2026-09-09T19:23:50Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"rainfall_imd","unit":"mm_24h","admin_code":472,"cluster_id":4720003587,"value":{"rainfall_mm_24h_idw":0},"valid_time":{"kind":"valid_time","requested":"2026-09-09T19:23:50Z","served_window_start_utc":"2026-09-09T19:16:40+00:00","served_window_end_utc":"2026-09-09T20:16:40+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":2},"note":"coarse witness support is disclosed; the value is not zoomed below it (§1.7)"},"witness":{"tier":"tier_o_v2","pin_seq":2298,"pin_sha256":"8a543982154279f28b06b8e863e763deb213b005fd0ebb21cb594bfde4522d0a","provenance_kind":"upstream-reingest:imd-city-weather-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-09-09T20:16:40+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":"2026-09-09T14:23:50Z","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` 2026-09-09T14:23:50Z is after the latest witnessed instant (2026-09-08T15:59:59.999000+00:00); the engine will not back-cast a value it has not yet observed (R7)"}}},{"signal":"aqi","resolved_at":"2026-09-09T21:53:50Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"aqi","unit":"cpcb_per_pollutant","admin_code":472,"cluster_id":4720003587,"value":{"aqi_pm2_5_idw":48.7961,"aqi_pm10_idw":44,"aqi_no2_idw":15.6535,"aqi_so2_idw":4.3918,"aqi_co_idw":24.4554,"aqi_ozone_idw":18.3},"valid_time":{"kind":"valid_time","requested":"2026-09-09T21:53:50Z","served_window_start_utc":"2026-09-09T21:00:53+00:00","served_window_end_utc":"2026-09-09T22:00:53+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":2,"aqi_pm10_n_stations":1,"aqi_no2_n_stations":4,"aqi_so2_n_stations":4,"aqi_co_n_stations":2,"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":1561,"pin_sha256":"bb47ea9ccb2a03782006a5404bda30bc544853feaacb82f76c15a868f23a492a","provenance_kind":"upstream-reingest:cpcb-aqi-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-09-09T22:00:53+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":"2026-09-09T21:53:50Z","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":472,"cluster_id":4720003587,"value":{"temperature_c_idw":25.4412,"rainfall_mm_24h_idw":0.4169,"humidity_pct_idw":86.9733,"wind_speed_kmph_idw":12.7219},"valid_time":{"kind":"valid_time","requested":"2026-09-09T21:53:50Z","served_window_start_utc":"2026-09-09T21:06:42+00:00","served_window_end_utc":"2026-09-09T22:06:42+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":2,"rainfall_mm_24h_n_stations":2,"humidity_pct_n_stations":2,"wind_speed_kmph_n_stations":2},"note":"coarse witness support is disclosed; the value is not zoomed below it (§1.7)"},"witness":{"tier":"tier_o_google_v1","pin_seq":2040,"pin_sha256":"9b8c13744fae700a43e53afd4e99e55d197af339b81c92e21cd8a2e1ce7930b3","provenance_kind":"upstream-reingest:google-weather-cowitness-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-09-09T22:06:42+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}}]}