{"source":"https://api.gridrock.ai/mcp","tool":"read_at","scope":"mh36","archetype":"now","cell":{"admin_code":474,"cluster_id":4740001679,"lat":20.945,"lng":74.525},"signals":[{"signal":"temperature","resolved_at":"2026-07-29T13:08:46Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"temperature","unit":"celsius","admin_code":474,"cluster_id":4740001679,"value":{"temperature_c_idw":26.8842},"valid_time":{"kind":"valid_time","requested":"2026-07-29T13:08:46Z","served_window_start_utc":"2026-07-29T12:17:13+00:00","served_window_end_utc":"2026-07-29T13:17:13+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":1300,"pin_sha256":"4e5540cb06a108d4e774e8303f1b5095b58add4d252b12bbf8172aa308934683","provenance_kind":"upstream-reingest:imd-city-weather-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-07-29T13:17:13+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":"2026-07-29T13:08:46Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"rainfall_imd","unit":"mm_24h","admin_code":474,"cluster_id":4740001679,"value":{"rainfall_mm_24h_idw":0.3486},"valid_time":{"kind":"valid_time","requested":"2026-07-29T13:08:46Z","served_window_start_utc":"2026-07-29T12:17:13+00:00","served_window_end_utc":"2026-07-29T13:17:13+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":1300,"pin_sha256":"4e5540cb06a108d4e774e8303f1b5095b58add4d252b12bbf8172aa308934683","provenance_kind":"upstream-reingest:imd-city-weather-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-07-29T13:17:13+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":"2026-07-29T08:08:46Z","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` 2026-07-29T08:08:46Z is after the latest witnessed instant (2026-07-27T00:59:59.999000+00:00); the engine will not back-cast a value it has not yet observed (R7)"}}},{"signal":"aqi","resolved_at":"2026-07-29T15:38:45Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"aqi","unit":"cpcb_per_pollutant","admin_code":474,"cluster_id":4740001679,"value":{"aqi_pm2_5_idw":36.6104,"aqi_pm10_idw":46.7973,"aqi_no2_idw":10,"aqi_so2_idw":2.094,"aqi_co_idw":22.7154,"aqi_ozone_idw":18.7865},"valid_time":{"kind":"valid_time","requested":"2026-07-29T15:38:45Z","served_window_start_utc":"2026-07-29T15:00:53+00:00","served_window_end_utc":"2026-07-29T16:00:53+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":4,"aqi_pm10_n_stations":4,"aqi_no2_n_stations":1,"aqi_so2_n_stations":2,"aqi_co_n_stations":3,"aqi_ozone_n_stations":3},"note":"coarse witness support is disclosed; the value is not zoomed below it (§1.7)"},"witness":{"tier":"tier_m_v1","pin_seq":789,"pin_sha256":"2921abd0700b93b1cd03a80e20593a1a644caa26900f11207efa649060e80985","provenance_kind":"upstream-reingest:cpcb-aqi-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-07-29T16:00:53+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":"2026-07-29T15:38:45Z","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":474,"cluster_id":4740001679,"value":{"temperature_c_idw":25.1974,"rainfall_mm_24h_idw":8.0662,"humidity_pct_idw":90.3817,"wind_speed_kmph_idw":19.4216},"valid_time":{"kind":"valid_time","requested":"2026-07-29T15:38:45Z","served_window_start_utc":"2026-07-29T15:06:50+00:00","served_window_end_utc":"2026-07-29T16:06:50+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":1026,"pin_sha256":"979eefe2cbb0ebaa33b4d03441f0516cdaea761578dd2054313771a668d66471","provenance_kind":"upstream-reingest:google-weather-cowitness-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-07-29T16:06:50+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}}]}