{"source":"https://api.gridrock.ai/mcp","tool":"read_at","scope":"mh36","archetype":"now","cell":{"admin_code":500,"cluster_id":5000000721,"lat":19.635,"lng":77.665},"signals":[{"signal":"temperature","resolved_at":"2026-09-03T10:29:50Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"temperature","unit":"celsius","admin_code":500,"cluster_id":5000000721,"value":{"temperature_c_idw":29.2962},"valid_time":{"kind":"valid_time","requested":"2026-09-03T10:29:50Z","served_window_start_utc":"2026-09-03T10:16:44+00:00","served_window_end_utc":"2026-09-03T11:16:44+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":2159,"pin_sha256":"92dca9a20dac0737d5a719d5e307db025008f8650883776145369c16dba0b0fd","provenance_kind":"upstream-reingest:imd-city-weather-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-09-03T11:16:44+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":"2026-09-03T10:29:50Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"rainfall_imd","unit":"mm_24h","admin_code":500,"cluster_id":5000000721,"value":{"rainfall_mm_24h_idw":0.2227},"valid_time":{"kind":"valid_time","requested":"2026-09-03T10:29:50Z","served_window_start_utc":"2026-09-03T10:16:44+00:00","served_window_end_utc":"2026-09-03T11:16:44+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":2159,"pin_sha256":"92dca9a20dac0737d5a719d5e307db025008f8650883776145369c16dba0b0fd","provenance_kind":"upstream-reingest:imd-city-weather-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-09-03T11:16:44+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":"2026-09-03T05:29:50Z","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` 2026-09-03T05:29:50Z is after the latest witnessed instant (2026-09-02T18:29:59.999000+00:00); the engine will not back-cast a value it has not yet observed (R7)"}}},{"signal":"aqi","resolved_at":"2026-09-03T12:59:50Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"aqi","unit":"cpcb_per_pollutant","admin_code":500,"cluster_id":5000000721,"value":{"aqi_pm2_5_idw":12.0085,"aqi_pm10_idw":29,"aqi_no2_idw":9.4593,"aqi_so2_idw":3.1311,"aqi_co_idw":16.5483,"aqi_ozone_idw":47.2548},"valid_time":{"kind":"valid_time","requested":"2026-09-03T12:59:50Z","served_window_start_utc":"2026-09-03T12:00:53+00:00","served_window_end_utc":"2026-09-03T13:00:53+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":2,"aqi_no2_n_stations":2,"aqi_so2_n_stations":2,"aqi_co_n_stations":3,"aqi_ozone_n_stations":2},"note":"coarse witness support is disclosed; the value is not zoomed below it (§1.7)"},"witness":{"tier":"tier_m_v1","pin_seq":1432,"pin_sha256":"bc3c2eb180aac2878f81d677628551aad6f0c6e9f0a05dac22d69d2b8e8b0798","provenance_kind":"upstream-reingest:cpcb-aqi-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-09-03T13:00:53+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":"2026-09-03T10:29:50Z","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":500,"cluster_id":5000000721,"value":{"temperature_c_idw":29.3435,"rainfall_mm_24h_idw":4.3078,"humidity_pct_idw":65.5025,"wind_speed_kmph_idw":8.8287},"valid_time":{"kind":"valid_time","requested":"2026-09-03T10:29:50Z","served_window_start_utc":"2026-09-03T10:06:47+00:00","served_window_end_utc":"2026-09-03T11:06:47+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":1885,"pin_sha256":"ffd8ad0de427b367466178195e8169a4521d4914b8c5828e676e2fe04b020001","provenance_kind":"upstream-reingest:google-weather-cowitness-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-09-03T11:06:47+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}}]}