{"source":"https://api.gridrock.ai/mcp","tool":"read_at","scope":"mh36","archetype":"now","cell":{"admin_code":488,"cluster_id":4880001669,"lat":17.925,"lng":76.375},"signals":[{"signal":"temperature","resolved_at":"2026-09-01T02:07:10Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"temperature","unit":"celsius","admin_code":488,"cluster_id":4880001669,"value":{"temperature_c_idw":23.6482},"valid_time":{"kind":"valid_time","requested":"2026-09-01T02:07:10Z","served_window_start_utc":"2026-09-01T01:16:45+00:00","served_window_end_utc":"2026-09-01T02:16:45+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":2102,"pin_sha256":"0fc56be543bde7f93c99697c1df9b54e56f495843f47a0cb10f46b16c31f4102","provenance_kind":"upstream-reingest:imd-city-weather-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-09-01T02:16:45+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":"2026-09-01T02:07:10Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"rainfall_imd","unit":"mm_24h","admin_code":488,"cluster_id":4880001669,"value":{"rainfall_mm_24h_idw":0.0059},"valid_time":{"kind":"valid_time","requested":"2026-09-01T02:07:10Z","served_window_start_utc":"2026-09-01T01:16:45+00:00","served_window_end_utc":"2026-09-01T02:16:45+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":2102,"pin_sha256":"0fc56be543bde7f93c99697c1df9b54e56f495843f47a0cb10f46b16c31f4102","provenance_kind":"upstream-reingest:imd-city-weather-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-09-01T02:16:45+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":"2026-09-01T02:07:10Z","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` 2026-09-01T02:07:10Z is after the latest witnessed instant (2026-08-31T13:59:59.999000+00:00); the engine will not back-cast a value it has not yet observed (R7)"}}},{"signal":"aqi","resolved_at":"2026-09-01T02:07:10Z","envelope":{"ok":false,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":null,"coverage":null,"error":{"code":"gap_in_observed_window","message":"no witness observed `at` 2026-09-01T02:07:10Z: the nearest pin's natural window is [2026-09-01T03:00:53+00:00, 2026-09-01T04:00:53+00:00]; the witness chain has a cadence gap across this instant (R7)"}}},{"signal":"weather_google","resolved_at":"2026-09-01T02:07:10Z","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":488,"cluster_id":4880001669,"value":{"temperature_c_idw":25.8597,"rainfall_mm_24h_idw":0.7321,"humidity_pct_idw":75.3379,"wind_speed_kmph_idw":19.9233},"valid_time":{"kind":"valid_time","requested":"2026-09-01T02:07:10Z","served_window_start_utc":"2026-09-01T02:06:48+00:00","served_window_end_utc":"2026-09-01T03:06:48+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":1829,"pin_sha256":"01905981643a0de258eceeead0436995690acaf958781bbae2111a0ab3e93479","provenance_kind":"upstream-reingest:google-weather-cowitness-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-09-01T03:06:48+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}}]}