{"source":"https://api.gridrock.ai/mcp","tool":"read_at","scope":"mh36","archetype":"now","cell":{"admin_code":494,"cluster_id":4940005326,"lat":17.745,"lng":73.835},"signals":[{"signal":"temperature","resolved_at":"2026-09-10T00:07:14Z","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":4940005326,"value":{"temperature_c_idw":28},"valid_time":{"kind":"valid_time","requested":"2026-09-10T00:07:14Z","served_window_start_utc":"2026-09-09T23:24:09+00:00","served_window_end_utc":"2026-09-10T00:24:09+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":1},"note":"coarse witness support is disclosed; the value is not zoomed below it (§1.7)"},"witness":{"tier":"tier_o_v2","pin_seq":2302,"pin_sha256":"01dc3e2be951f3e01e5738ec32db4e3b2c44e7c43162477fa9af74114aad5696","provenance_kind":"upstream-reingest:imd-city-weather-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-09-10T00:24:09+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":"2026-09-10T00:07:14Z","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":4940005326,"value":{"rainfall_mm_24h_idw":0},"valid_time":{"kind":"valid_time","requested":"2026-09-10T00:07:14Z","served_window_start_utc":"2026-09-09T23:24:09+00:00","served_window_end_utc":"2026-09-10T00:24:09+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":1},"note":"coarse witness support is disclosed; the value is not zoomed below it (§1.7)"},"witness":{"tier":"tier_o_v2","pin_seq":2302,"pin_sha256":"01dc3e2be951f3e01e5738ec32db4e3b2c44e7c43162477fa9af74114aad5696","provenance_kind":"upstream-reingest:imd-city-weather-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-09-10T00:24:09+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":"2026-09-10T00:07:14Z","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` 2026-09-10T00:07:14Z is after the latest witnessed instant (2026-09-08T15:59:59.999000+00:00); the engine will not back-cast a value it has not yet observed (R7)"}}},{"signal":"aqi","resolved_at":"2026-09-10T00:07:14Z","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` 2026-09-10T00:07:14Z is after the latest witnessed instant (2026-09-10T00:00:53+00:00); the engine will not back-cast a value it has not yet observed (R7)"}}},{"signal":"weather_google","resolved_at":"2026-09-10T00:07:14Z","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":4940005326,"value":{"temperature_c_idw":26,"rainfall_mm_24h_idw":2.96,"humidity_pct_idw":89,"wind_speed_kmph_idw":3},"valid_time":{"kind":"valid_time","requested":"2026-09-10T00:07:14Z","served_window_start_utc":"2026-09-10T00:06:19+00:00","served_window_end_utc":"2026-09-10T01:06:19+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":1,"rainfall_mm_24h_n_stations":1,"humidity_pct_n_stations":1,"wind_speed_kmph_n_stations":1},"note":"coarse witness support is disclosed; the value is not zoomed below it (§1.7)"},"witness":{"tier":"tier_o_google_v1","pin_seq":2043,"pin_sha256":"23372b471a1109a31384fbbe4f632e11010e969f77df102cf866aea57cd1da3e","provenance_kind":"upstream-reingest:google-weather-cowitness-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-09-10T01:06:19+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}}]}