{"source":"https://api.gridrock.ai/mcp","tool":"read_at","scope":"mh36","archetype":"now","cell":{"admin_code":468,"cluster_id":4680009993,"lat":21.625,"lng":77.165},"signals":[{"signal":"temperature","resolved_at":"2026-09-17T00:06:11Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"temperature","unit":"celsius","admin_code":468,"cluster_id":4680009993,"value":{"temperature_c_idw":22.7052},"valid_time":{"kind":"valid_time","requested":"2026-09-17T00:06:11Z","served_window_start_utc":"2026-09-16T23:24:21+00:00","served_window_end_utc":"2026-09-17T00:24:21+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":2469,"pin_sha256":"43b33701d4e993d39886080c35962d0d8ceed6f5f4b7c6ecab0e6a0f85a1a631","provenance_kind":"upstream-reingest:imd-city-weather-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-09-17T00:24:21+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":"2026-09-17T00:06:11Z","envelope":{"ok":true,"tool":"read_at","generation":{"namespace":"bs:cube:0852c73eef54","schema_fingerprint_ns":"0852c73eef54"},"result":{"signal":"rainfall_imd","unit":"mm_24h","admin_code":468,"cluster_id":4680009993,"value":{"rainfall_mm_24h_idw":0.283},"valid_time":{"kind":"valid_time","requested":"2026-09-17T00:06:11Z","served_window_start_utc":"2026-09-16T23:24:21+00:00","served_window_end_utc":"2026-09-17T00:24:21+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":2469,"pin_sha256":"43b33701d4e993d39886080c35962d0d8ceed6f5f4b7c6ecab0e6a0f85a1a631","provenance_kind":"upstream-reingest:imd-city-weather-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-09-17T00:24:21+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":"2026-09-17T00:06:12Z","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` 2026-09-17T00:06:12Z is after the latest witnessed instant (2026-09-12T03:59:59.999000+00:00); the engine will not back-cast a value it has not yet observed (R7)"}}},{"signal":"aqi","resolved_at":"2026-09-17T00:06:12Z","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` 2026-09-17T00:06:12Z: the nearest pin's natural window is [2026-09-17T03:00:53+00:00, 2026-09-17T04:00:53+00:00]; the witness chain has a cadence gap across this instant (R7)"}}},{"signal":"weather_google","resolved_at":"2026-09-17T00:06:12Z","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":468,"cluster_id":4680009993,"value":{"temperature_c_idw":24.44,"rainfall_mm_24h_idw":0.7221,"humidity_pct_idw":91.3035,"wind_speed_kmph_idw":7.6167},"valid_time":{"kind":"valid_time","requested":"2026-09-17T00:06:12Z","served_window_start_utc":"2026-09-16T23:06:40+00:00","served_window_end_utc":"2026-09-17T00:06:40+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":2210,"pin_sha256":"f2dcdf460ba206359ac1ef33bddc85a525b20378506065f3af0ff2bfa39168d7","provenance_kind":"upstream-reingest:google-weather-cowitness-hourly"}},"coverage":{"temporal_kind":"valid_time","observed_window_end_utc":"2026-09-17T00:06:40+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}}]}