{"source":"https://api.gridrock.ai/mcp","tool":"read_at","scope":"mh36","archetype":"now","cell":{"admin_code":470,"cluster_id":4700007678,"lat":19.175,"lng":75.695},"signals":[{"signal":"temperature","resolved_at":"2026-07-18T06:16:54Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"temperature","unit":"celsius","admin_code":470,"cluster_id":4700007678,"value":{"temperature_c_idw":27.7429},"valid_time":{"kind":"valid_time","requested":"2026-07-18T06:16:54Z","served_window_start_utc":"2026-07-18T06:16:46+00:00","served_window_end_utc":"2026-07-18T07:16:46+00:00","natural_cadence_seconds":3600,"note":"the witness pin whose own natural window brackets `at`; never interpolated, never back-cast (R7)"},"support":{"kind":"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":1030,"pin_sha256":"4bf736d2a7473cee5134377f5899eac43a1b7b48b2e2b1067d04b00428713f67","provenance_kind":"upstream-reingest:imd-city-weather-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-07-18T07:16:46+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":"2026-07-18T06:16:54Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"rainfall_imd","unit":"mm_24h","admin_code":470,"cluster_id":4700007678,"value":{"rainfall_mm_24h_idw":0},"valid_time":{"kind":"valid_time","requested":"2026-07-18T06:16:54Z","served_window_start_utc":"2026-07-18T06:16:46+00:00","served_window_end_utc":"2026-07-18T07:16:46+00:00","natural_cadence_seconds":3600,"note":"the witness pin whose own natural window brackets `at`; never interpolated, never back-cast (R7)"},"support":{"kind":"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":1030,"pin_sha256":"4bf736d2a7473cee5134377f5899eac43a1b7b48b2e2b1067d04b00428713f67","provenance_kind":"upstream-reingest:imd-city-weather-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-07-18T07:16:46+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":"2026-07-18T01:16:54Z","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` 2026-07-18T01:16:54Z is after the latest witnessed instant (2026-07-15T10:29:59.999000+00:00); the engine will not back-cast a value it has not yet observed (R7)"}}},{"signal":"aqi","resolved_at":"2026-07-18T08:46:54Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"aqi","unit":"cpcb_per_pollutant","admin_code":470,"cluster_id":4700007678,"value":{"aqi_pm2_5_idw":31.704,"aqi_pm10_idw":40.5877,"aqi_no2_idw":19,"aqi_so2_idw":15.4342,"aqi_co_idw":14.1167,"aqi_ozone_idw":13},"valid_time":{"kind":"valid_time","requested":"2026-07-18T08:46:54Z","served_window_start_utc":"2026-07-18T08:00:54+00:00","served_window_end_utc":"2026-07-18T09:00:54+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":2,"aqi_no2_n_stations":1,"aqi_so2_n_stations":4,"aqi_co_n_stations":2,"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":596,"pin_sha256":"121e82e929146d98f7d28a1d53035e75f1a41eafe0571cf6f9dadefb07734c6c","provenance_kind":"upstream-reingest:cpcb-aqi-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-07-18T09:00:54+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":"2026-07-18T08:46:54Z","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":470,"cluster_id":4700007678,"value":{"temperature_c_idw":28.0413,"rainfall_mm_24h_idw":5.3088,"humidity_pct_idw":70.9825,"wind_speed_kmph_idw":14.4086},"valid_time":{"kind":"valid_time","requested":"2026-07-18T08:46:54Z","served_window_start_utc":"2026-07-18T08:06:48+00:00","served_window_end_utc":"2026-07-18T09:06:48+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":755,"pin_sha256":"d75607467213a219d01f66e83cb13f020a189de01f878c7a98f52cec2dd02186","provenance_kind":"upstream-reingest:google-weather-cowitness-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-07-18T09:06:48+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}}]}