{"source":"https://api.gridrock.ai/mcp","tool":"read_at","scope":"mh36","archetype":"now","cell":{"admin_code":494,"cluster_id":4940007744,"lat":17.965,"lng":73.825},"signals":[{"signal":"temperature","resolved_at":"2026-09-12T18:19:08Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"temperature","unit":"celsius","admin_code":494,"cluster_id":4940007744,"value":{"temperature_c_idw":25.1983},"valid_time":{"kind":"valid_time","requested":"2026-09-12T18:19:08Z","served_window_start_utc":"2026-09-12T18:16:36+00:00","served_window_end_utc":"2026-09-12T19:16:36+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":2369,"pin_sha256":"fad44b8d67be2e27d484b0f6e07ab59e5348f9557f3964ce02d949d228b4a5cd","provenance_kind":"upstream-reingest:imd-city-weather-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-09-12T19:16:36+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":"2026-09-12T18:19:08Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"rainfall_imd","unit":"mm_24h","admin_code":494,"cluster_id":4940007744,"value":{"rainfall_mm_24h_idw":0.0651},"valid_time":{"kind":"valid_time","requested":"2026-09-12T18:19:08Z","served_window_start_utc":"2026-09-12T18:16:36+00:00","served_window_end_utc":"2026-09-12T19:16:36+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":2369,"pin_sha256":"fad44b8d67be2e27d484b0f6e07ab59e5348f9557f3964ce02d949d228b4a5cd","provenance_kind":"upstream-reingest:imd-city-weather-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-09-12T19:16:36+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":"2026-09-12T13:19:08Z","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` 2026-09-12T13:19:08Z is after the latest witnessed instant (2026-09-09T21:59:59.999000+00:00); the engine will not back-cast a value it has not yet observed (R7)"}}},{"signal":"aqi","resolved_at":"2026-09-12T20:49:08Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"aqi","unit":"cpcb_per_pollutant","admin_code":494,"cluster_id":4940007744,"value":{"aqi_pm2_5_idw":34.9615,"aqi_pm10_idw":68.8549,"aqi_no2_idw":12.578,"aqi_so2_idw":3.1771,"aqi_co_idw":47.7504,"aqi_ozone_idw":8.9816},"valid_time":{"kind":"valid_time","requested":"2026-09-12T20:49:08Z","served_window_start_utc":"2026-09-12T20:00:53+00:00","served_window_end_utc":"2026-09-12T21:00:53+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":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":1611,"pin_sha256":"184155b82acc8d391e3e1a5bb2c44b7f99c59d8199182da8ffca39722a17798f","provenance_kind":"upstream-reingest:cpcb-aqi-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-09-12T21:00:53+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":"2026-09-12T20:49:08Z","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":494,"cluster_id":4940007744,"value":{"temperature_c_idw":23.9433,"rainfall_mm_24h_idw":2.3687,"humidity_pct_idw":87.3254,"wind_speed_kmph_idw":9.4712},"valid_time":{"kind":"valid_time","requested":"2026-09-12T20:49:08Z","served_window_start_utc":"2026-09-12T20:06:37+00:00","served_window_end_utc":"2026-09-12T21:06:37+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":2111,"pin_sha256":"d0ec02809dc0c8be7f715981c94c1b35f755d8081d5349f2f43a81e94b2ba811","provenance_kind":"upstream-reingest:google-weather-cowitness-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-09-12T21:06:37+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}}]}