{"source":"https://api.gridrock.ai/mcp","tool":"read_at","scope":"mh36","archetype":"now","cell":{"admin_code":487,"cluster_id":4870000007,"lat":19.605,"lng":73.585},"signals":[{"signal":"temperature","resolved_at":"2026-07-15T13:01:40Z","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` 2026-07-15T13:01:40Z is after the latest witnessed instant (2026-07-15T12:16:43+00:00); the engine will not back-cast a value it has not yet observed (R7)"}}},{"signal":"rainfall_imd","resolved_at":"2026-07-15T13:01:40Z","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` 2026-07-15T13:01:40Z is after the latest witnessed instant (2026-07-15T12:16:43+00:00); the engine will not back-cast a value it has not yet observed (R7)"}}},{"signal":"rainfall","resolved_at":"2026-07-15T13:01:40Z","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` 2026-07-15T13:01:40Z is after the latest witnessed instant (2026-07-13T18:59:59.999000+00:00); the engine will not back-cast a value it has not yet observed (R7)"}}},{"signal":"aqi","resolved_at":"2026-07-15T13:01:40Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"aqi","unit":"cpcb_per_pollutant","admin_code":487,"cluster_id":4870000007,"value":{"aqi_pm2_5_idw":28.7898,"aqi_pm10_idw":49.379,"aqi_no2_idw":13.7917,"aqi_so2_idw":2.6212,"aqi_co_idw":23.392,"aqi_ozone_idw":38.0746},"valid_time":{"kind":"valid_time","requested":"2026-07-15T13:01:40Z","served_window_start_utc":"2026-07-15T12:04:00+00:00","served_window_end_utc":"2026-07-15T13:04:00+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":4,"aqi_so2_n_stations":4,"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":551,"pin_sha256":"b8f692cf568a1ea3167a0f6e7461f527811a961e4b13a778524d75c190c16f86","provenance_kind":"upstream-reingest:cpcb-aqi-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-07-15T13:04:00+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":"2026-07-15T13:01:40Z","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":487,"cluster_id":4870000007,"value":{"temperature_c_idw":25.8888,"rainfall_mm_24h_idw":4.5123,"humidity_pct_idw":81.3541,"wind_speed_kmph_idw":17.2229},"valid_time":{"kind":"valid_time","requested":"2026-07-15T13:01:40Z","served_window_start_utc":"2026-07-15T12:06:48+00:00","served_window_end_utc":"2026-07-15T13:06:48+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":687,"pin_sha256":"e4b72f638bb9f92e89f3ad5180af316ea61c8e19417a09692cabfe8a20eac750","provenance_kind":"upstream-reingest:google-weather-cowitness-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-07-15T13:06:48+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}}]}