{"source":"https://api.gridrock.ai/mcp","tool":"read_at","scope":"mh36","archetype":"now","cell":{"admin_code":490,"cluster_id":4900012451,"lat":19.155,"lng":73.735},"signals":[{"signal":"temperature","resolved_at":"2026-09-04T17:16:43Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"temperature","unit":"celsius","admin_code":490,"cluster_id":4900012451,"value":{"temperature_c_idw":25.1517},"valid_time":{"kind":"valid_time","requested":"2026-09-04T17:16:43Z","served_window_start_utc":"2026-09-04T16:16:45+00:00","served_window_end_utc":"2026-09-04T17:16:45+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":2189,"pin_sha256":"37bd881fefe8bdc3744195fb239a0077cd3898642ea4bc97834a58bfa43849bf","provenance_kind":"upstream-reingest:imd-city-weather-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-09-04T17:16:45+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":"2026-09-04T17:16:43Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"rainfall_imd","unit":"mm_24h","admin_code":490,"cluster_id":4900012451,"value":{"rainfall_mm_24h_idw":0.2185},"valid_time":{"kind":"valid_time","requested":"2026-09-04T17:16:43Z","served_window_start_utc":"2026-09-04T16:16:45+00:00","served_window_end_utc":"2026-09-04T17:16:45+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":2189,"pin_sha256":"37bd881fefe8bdc3744195fb239a0077cd3898642ea4bc97834a58bfa43849bf","provenance_kind":"upstream-reingest:imd-city-weather-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-09-04T17:16:45+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":"2026-09-04T12:16:43Z","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` 2026-09-04T12:16:43Z is after the latest witnessed instant (2026-09-04T01:59:59.999000+00:00); the engine will not back-cast a value it has not yet observed (R7)"}}},{"signal":"aqi","resolved_at":"2026-09-04T12:16:43Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"aqi","unit":"cpcb_per_pollutant","admin_code":490,"cluster_id":4900012451,"value":{"aqi_pm2_5_idw":32.9868,"aqi_pm10_idw":76.7385,"aqi_no2_idw":29.2323,"aqi_so2_idw":5.7568,"aqi_co_idw":15.7485,"aqi_ozone_idw":42},"valid_time":{"kind":"valid_time","requested":"2026-09-04T12:16:43Z","served_window_start_utc":"2026-09-04T12:00:53+00:00","served_window_end_utc":"2026-09-04T13:00:53+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":3,"aqi_no2_n_stations":2,"aqi_so2_n_stations":4,"aqi_co_n_stations":4,"aqi_ozone_n_stations":1},"note":"coarse witness support is disclosed; the value is not zoomed below it (§1.7)"},"witness":{"tier":"tier_m_v1","pin_seq":1452,"pin_sha256":"c06643cf93c82f68495cf7edc1de8006148ebe3763a323e8537da2f1d43c677b","provenance_kind":"upstream-reingest:cpcb-aqi-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-09-04T13:00:53+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":"2026-09-04T17:16:43Z","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":490,"cluster_id":4900012451,"value":{"temperature_c_idw":24.2885,"rainfall_mm_24h_idw":2.6218,"humidity_pct_idw":88.0163,"wind_speed_kmph_idw":9.3603},"valid_time":{"kind":"valid_time","requested":"2026-09-04T17:16:43Z","served_window_start_utc":"2026-09-04T17:06:50+00:00","served_window_end_utc":"2026-09-04T18:06:50+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":1916,"pin_sha256":"e0f0e98757584ce58777465c1cc7ee2acd4c2ac5651ad3f6d3d2915be7251298","provenance_kind":"upstream-reingest:google-weather-cowitness-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-09-04T18:06:50+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}}]}