{"source":"https://api.gridrock.ai/mcp","tool":"read_at","scope":"mh36","archetype":"now","cell":{"admin_code":473,"cluster_id":4730006835,"lat":20.335,"lng":79.095},"signals":[{"signal":"temperature","resolved_at":"2026-08-21T09:15:28Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"temperature","unit":"celsius","admin_code":473,"cluster_id":4730006835,"value":{"temperature_c_idw":29.6405},"valid_time":{"kind":"valid_time","requested":"2026-08-21T09:15:28Z","served_window_start_utc":"2026-08-21T08:16:49+00:00","served_window_end_utc":"2026-08-21T09:16:49+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":1847,"pin_sha256":"c000c06cac8b9f56ad190540f10288960bd4031e028aef0fb47034d3ad7558fa","provenance_kind":"upstream-reingest:imd-city-weather-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-08-21T09:16:49+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":"2026-08-21T09:15:28Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"rainfall_imd","unit":"mm_24h","admin_code":473,"cluster_id":4730006835,"value":{"rainfall_mm_24h_idw":0},"valid_time":{"kind":"valid_time","requested":"2026-08-21T09:15:28Z","served_window_start_utc":"2026-08-21T08:16:49+00:00","served_window_end_utc":"2026-08-21T09:16:49+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":1847,"pin_sha256":"c000c06cac8b9f56ad190540f10288960bd4031e028aef0fb47034d3ad7558fa","provenance_kind":"upstream-reingest:imd-city-weather-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-08-21T09:16:49+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":"2026-08-21T04:15:29Z","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` 2026-08-21T04:15:29Z is after the latest witnessed instant (2026-08-20T13:29:59.999000+00:00); the engine will not back-cast a value it has not yet observed (R7)"}}},{"signal":"aqi","resolved_at":"2026-08-21T11:45:28Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"aqi","unit":"cpcb_per_pollutant","admin_code":473,"cluster_id":4730006835,"value":{"aqi_pm2_5_idw":56.7822,"aqi_pm10_idw":58.926,"aqi_no2_idw":8.054,"aqi_so2_idw":3.3618,"aqi_co_idw":38,"aqi_ozone_idw":17},"valid_time":{"kind":"valid_time","requested":"2026-08-21T11:45:28Z","served_window_start_utc":"2026-08-21T11:00:53+00:00","served_window_end_utc":"2026-08-21T12:00:53+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":3,"aqi_no2_n_stations":2,"aqi_so2_n_stations":2,"aqi_co_n_stations":1,"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":1204,"pin_sha256":"6ac78abde3bb14d09d5b52c866aa787fdef6f55243c504a83143422627130e8c","provenance_kind":"upstream-reingest:cpcb-aqi-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-08-21T12:00:53+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":"2026-08-21T11:45:28Z","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":473,"cluster_id":4730006835,"value":{"temperature_c_idw":28.6514,"rainfall_mm_24h_idw":2.9505,"humidity_pct_idw":72.6867,"wind_speed_kmph_idw":10.1626},"valid_time":{"kind":"valid_time","requested":"2026-08-21T11:45:28Z","served_window_start_utc":"2026-08-21T11:06:49+00:00","served_window_end_utc":"2026-08-21T12:06:49+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":1574,"pin_sha256":"2567b38ebf9d210b2ff4f2eae28e3a1cb7085457350b650786a33dec4823bbea","provenance_kind":"upstream-reingest:google-weather-cowitness-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-08-21T12:06:49+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}}]}