{"source":"https://api.gridrock.ai/mcp","tool":"read_at","scope":"mh36","archetype":"now","cell":{"admin_code":490,"cluster_id":4900001566,"lat":18.155,"lng":74.465},"signals":[{"signal":"temperature","resolved_at":"2026-08-21T03:48:53Z","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":4900001566,"value":{"temperature_c_idw":25.4062},"valid_time":{"kind":"valid_time","requested":"2026-08-21T03:48:53Z","served_window_start_utc":"2026-08-21T03:16:42+00:00","served_window_end_utc":"2026-08-21T04:16:42+00:00","natural_cadence_seconds":3600,"note":"the witness pin whose own natural window brackets `at`; never interpolated, never back-cast (R7)"},"support":{"kind":"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":1842,"pin_sha256":"50b57a933dadbb775b9157979deec1d83d5c25c7e003cb4c939c4f3c5490a671","provenance_kind":"upstream-reingest:imd-city-weather-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-08-21T04:16:42+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":"2026-08-21T03:48:53Z","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":4900001566,"value":{"rainfall_mm_24h_idw":2.9227},"valid_time":{"kind":"valid_time","requested":"2026-08-21T03:48:53Z","served_window_start_utc":"2026-08-21T03:16:42+00:00","served_window_end_utc":"2026-08-21T04:16:42+00:00","natural_cadence_seconds":3600,"note":"the witness pin whose own natural window brackets `at`; never interpolated, never back-cast (R7)"},"support":{"kind":"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":1842,"pin_sha256":"50b57a933dadbb775b9157979deec1d83d5c25c7e003cb4c939c4f3c5490a671","provenance_kind":"upstream-reingest:imd-city-weather-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-08-21T04:16:42+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":"2026-08-20T22:48:53Z","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` 2026-08-20T22:48:53Z is after the latest witnessed instant (2026-08-20T06:59:59.999000+00:00); the engine will not back-cast a value it has not yet observed (R7)"}}},{"signal":"aqi","resolved_at":"2026-08-20T22:48:53Z","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":4900001566,"value":{"aqi_pm2_5_idw":34.6362,"aqi_pm10_idw":61.2217,"aqi_no2_idw":14.2856,"aqi_so2_idw":4,"aqi_co_idw":19.8439,"aqi_ozone_idw":9.57},"valid_time":{"kind":"valid_time","requested":"2026-08-20T22:48:53Z","served_window_start_utc":"2026-08-20T22:00:53+00:00","served_window_end_utc":"2026-08-20T23:00:53+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":4,"aqi_so2_n_stations":1,"aqi_co_n_stations":4,"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":1196,"pin_sha256":"009a7dcf2123a1e842069d5804f1181982c325ef305bc6a16626e7a331a2f7cf","provenance_kind":"upstream-reingest:cpcb-aqi-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-08-20T23:00:53+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":"2026-08-21T03:48:53Z","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":4900001566,"value":{"temperature_c_idw":26.67,"rainfall_mm_24h_idw":2.8603,"humidity_pct_idw":77.8862,"wind_speed_kmph_idw":17.9494},"valid_time":{"kind":"valid_time","requested":"2026-08-21T03:48:53Z","served_window_start_utc":"2026-08-21T03:06:46+00:00","served_window_end_utc":"2026-08-21T04:06:46+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":1566,"pin_sha256":"424b7b9754b2790e5fe7fe792d4380c8c9a46cc967bdee6313bc296b8ac5994d","provenance_kind":"upstream-reingest:google-weather-cowitness-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-08-21T04:06:46+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}}]}