{"source":"https://api.gridrock.ai/mcp","tool":"read_at","scope":"mh36","archetype":"now","cell":{"admin_code":480,"cluster_id":4800002736,"lat":16.405,"lng":74.255},"signals":[{"signal":"temperature","resolved_at":"2026-07-18T22:06:47Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"temperature","unit":"celsius","admin_code":480,"cluster_id":4800002736,"value":{"temperature_c_idw":26.2922},"valid_time":{"kind":"valid_time","requested":"2026-07-18T22:06:47Z","served_window_start_utc":"2026-07-18T21:16:45+00:00","served_window_end_utc":"2026-07-18T22:16:45+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":1045,"pin_sha256":"eb32e542624d3fca12c2b21016be671635106fc6c63fc6ee74e07f76b568db21","provenance_kind":"upstream-reingest:imd-city-weather-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-07-18T22:16:45+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":"2026-07-18T22:06:47Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"rainfall_imd","unit":"mm_24h","admin_code":480,"cluster_id":4800002736,"value":{"rainfall_mm_24h_idw":1.1955},"valid_time":{"kind":"valid_time","requested":"2026-07-18T22:06:47Z","served_window_start_utc":"2026-07-18T21:16:45+00:00","served_window_end_utc":"2026-07-18T22:16:45+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":1045,"pin_sha256":"eb32e542624d3fca12c2b21016be671635106fc6c63fc6ee74e07f76b568db21","provenance_kind":"upstream-reingest:imd-city-weather-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-07-18T22:16:45+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":"2026-07-18T17:06:47Z","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` 2026-07-18T17:06:47Z is after the latest witnessed instant (2026-07-16T02:59:59.999000+00:00); the engine will not back-cast a value it has not yet observed (R7)"}}},{"signal":"aqi","resolved_at":"2026-07-18T22:06:47Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"aqi","unit":"cpcb_per_pollutant","admin_code":480,"cluster_id":4800002736,"value":{"aqi_pm2_5_idw":50.0577,"aqi_pm10_idw":68.7164,"aqi_no2_idw":18.2933,"aqi_so2_idw":4.7644,"aqi_co_idw":15.9579,"aqi_ozone_idw":15.1237},"valid_time":{"kind":"valid_time","requested":"2026-07-18T22:06:47Z","served_window_start_utc":"2026-07-18T22:00:53+00:00","served_window_end_utc":"2026-07-18T23:00:53+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":2,"aqi_no2_n_stations":2,"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":610,"pin_sha256":"a5b56b97985b104dbaee71b3018f2a9f5cdf730805aa4500160765d18d9f8753","provenance_kind":"upstream-reingest:cpcb-aqi-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-07-18T23:00:53+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":"2026-07-18T22:06:47Z","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":480,"cluster_id":4800002736,"value":{"temperature_c_idw":23.307,"rainfall_mm_24h_idw":7.6776,"humidity_pct_idw":94.6627,"wind_speed_kmph_idw":10.0413},"valid_time":{"kind":"valid_time","requested":"2026-07-18T22:06:47Z","served_window_start_utc":"2026-07-18T21:06:47+00:00","served_window_end_utc":"2026-07-18T22:06:47+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":768,"pin_sha256":"dee9432afdd4646e233b8fbe50e02defffcd7d3972f57370c82061cd06609896","provenance_kind":"upstream-reingest:google-weather-cowitness-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-07-18T22:06:47+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}}]}