Fifteen-minute preliminary constraints

ISONE's Fifteen-minute preliminary constraints.

Congestion & Constraints data ISO-NE market

Query with the agent

Native record

publisher period x document x sheet/archive member x source row x collected revision

day publication publication cadence

Evidence

Mixed evidence

Multiple evidence types kept distinct in the contract

Time basis

Date-labelled records

UTC · report_date

Overview

Each row preserves a publisher record, workbook row, or report document with its source member and row index. Source timestamps, units, geographic scope, and revision qualifiers are retained in record_json; event_time is collection time; completed_at is when the entire document became available.

Query contract

The view admits a document only when its completion record and exact mirrored row count agree. Select a report_date, source_url and source_sha256 revision before joining source_member and row_index. Interpret observation times from the source record, never from the collection clock.

Analysis rules

Decode the report's source headers and units before aggregating. Never sum report_date, row_index, snapshots, revisions, regional totals and components, or forecast vintages.

Interpretation

report_date identifies the requested publisher period. It is not an observation timestamp. event_time records collection, not source publication or delivery.
The serving mirror keeps the latest row for each publisher record; older collected revisions may no longer be queryable.

Access

Query from your own tools

Use the guarded HTTP endpoint directly, or connect an MCP client and load the dataset contract with describe_data before calling query_data.

ISO-NE MCP API reference

HTTP endpoint

POST /api/v1/datasets/iso_ne_report_constraints_rt_15m_prelim/query

Need the full history of this dataset in Snowflake, Databricks or your own storage? Data services delivers it on a schedule.

Schema11

Column

Type

event_timeDateTime64(6, 'UTC')

datasetLowCardinality(String)

report_dateDate32

source_urlString

source_memberString

source_sha256String

row_indexInt64

record_jsonString

response_metadataString

ingested_atDateTime64(6, 'UTC')

completed_atDateTime64(6, 'UTC')

Sample data

event_time	dataset	report_date	source_url	source_member	source_sha256	record_json	response_metadata	ingested_at	completed_at
2026-10-11 04:00:32.179464	constraints_rt_15m_prelim	2026-10-11	https://webservices.iso-ne.com/api/v1.1/fifteenminuteconstraints/prelim/day/20261011.json	20261011.json	185c3014e2c4d0c4964865a063d577612cdd8b52b6034dc5afa151ea7cbabd80	{"FifteenMinBcs": {}}	{"content-type": "application/json"}	2026-10-11 04:00:32.349844	2026-10-11 04:00:33.095030
2026-10-11 03:15:35.391008	constraints_rt_15m_prelim	2026-10-10	https://webservices.iso-ne.com/api/v1.1/fifteenminuteconstraints/prelim/day/20261010.json	20261010.json	7c593746fd43df77f2e6380d742b17c2afe39ce0af144187a58f78cfd4f33dcd	{"FifteenMinBcs": {"FifteenMinBc": [{"BeginDate": "2026-10-10T00:00:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-10T00:00:00.000-04:00", "MarginalValue": 0.57, "HourEnd": "01"}, {"BeginDate": "2026-10-10T00:15:00.000-04:00", "ConstraintName": "NYCA Ramp Limit", "MarginalValueInterval": "2026-10-10T00:15:00.000-04:00", "MarginalValue": 0, "HourEnd": "01"}, {"BeginDate": "2026-10-10T08:00:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-10T08:00:00.000-04:00", "MarginalValue": 4.65, "HourEnd": "09"}, {"BeginDate": "2026-10-10T08:45:00.000-04:00", "ConstraintName": "NYCA Ramp Limit", "MarginalValueInterval": "2026-10-10T08:45:00.000-04:00", "MarginalValue": 0, "HourEnd": "09"}, {"BeginDate": "2026-10-10T16:45:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-10T16:45:00.000-04:00", "MarginalValue": 1.17, "HourEnd": "17"}, {"BeginDate": "2026-10-10T22:00:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-10T22:00:00.000-04:00", "MarginalValue": 1.19, "HourEnd": "23"}, {"BeginDate": "2026-10-10T22:15:00.000-04:00", "ConstraintName": "NYCA Ramp Limit", "MarginalValueInterval": "2026-10-10T22:15:00.000-04:00", "MarginalValue": 0, "HourEnd": "23"}]}}	{"content-type": "application/json"}	2026-10-11 03:15:35.408102	2026-10-11 03:15:35.557496
2026-10-11 03:15:34.818514	constraints_rt_15m_prelim	2026-10-09	https://webservices.iso-ne.com/api/v1.1/fifteenminuteconstraints/prelim/day/20261009.json	20261009.json	cd9ff68f14a3b5eae3e5a5d6c432ec999cb782a38119e19dafba3e787cf4c094	{"FifteenMinBcs": {"FifteenMinBc": [{"BeginDate": "2026-10-09T00:15:00.000-04:00", "ConstraintName": "NYCA Ramp Limit", "MarginalValueInterval": "2026-10-09T00:15:00.000-04:00", "MarginalValue": 0, "HourEnd": "01"}, {"BeginDate": "2026-10-09T00:30:00.000-04:00", "ConstraintName": "NYCA Ramp Limit", "MarginalValueInterval": "2026-10-09T00:30:00.000-04:00", "MarginalValue": 0, "HourEnd": "01"}, {"BeginDate": "2026-10-09T06:15:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-09T06:15:00.000-04:00", "MarginalValue": 2.76, "HourEnd": "07"}, {"BeginDate": "2026-10-09T08:15:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-09T08:15:00.000-04:00", "MarginalValue": -3.49, "HourEnd": "09"}, {"BeginDate": "2026-10-09T08:30:00.000-04:00", "ConstraintName": "NYCA Ramp Limit", "MarginalValueInterval": "2026-10-09T08:30:00.000-04:00", "MarginalValue": 0, "HourEnd": "09"}, {"BeginDate": "2026-10-09T09:00:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-09T09:00:00.000-04:00", "MarginalValue": 5.55, "HourEnd": "10"}, {"BeginDate": "2026-10-09T09:15:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-09T09:15:00.000-04:00", "MarginalValue": -4.62, "HourEnd": "10"}, {"BeginDate": "2026-10-09T09:45:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-09T09:45:00.000-04:00", "MarginalValue": -0.45, "HourEnd": "10"}, {"BeginDate": "2026-10-09T10:00:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-09T10:00:00.000-04:00", "MarginalValue": 4.97, "HourEnd": "11"}, {"BeginDate": "2026-10-09T18:45:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-09T18:45:00.000-04:00", "MarginalValue": 5.04, "HourEnd": "19"}, {"BeginDate": "2026-10-09T19:00:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-09T19:00:00.000-04:00", "MarginalValue": -5.34, "HourEnd": "20"}, {"BeginDate": "2026-10-09T19:15:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-09T19:15:00.000-04:00", "MarginalValue": -1.7, "HourEnd": "20"}, {"BeginDate": "2026-10-09T19:45:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-09T19:45:00.000-04:00", "MarginalValue": 2.82, "HourEnd": "20"}, {"BeginDate": "2026-10-09T20:00:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-09T20:00:00.000-04:00", "MarginalValue": -2.12, "HourEnd": "21"}, {"BeginDate": "2026-10-09T20:15:00.000-04:00", "ConstraintName": "NYCA Ramp Limit", "MarginalValueInterval": "2026-10-09T20:15:00.000-04:00", "MarginalValue": 0, "HourEnd": "21"}, {"BeginDate": "2026-10-09T20:30:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-09T20:30:00.000-04:00", "MarginalValue": 4.33, "HourEnd": "21"}, {"BeginDate": "2026-10-09T20:45:00.000-04:00", "ConstraintName": "NYCA Ramp Limit", "MarginalValueInterval": "2026-10-09T20:45:00.000-04:00", "MarginalValue": 0, "HourEnd": "21"}, {"BeginDate": "2026-10-09T21:30:00.000-04:00", "ConstraintName": "NYCA Ramp Limit", "MarginalValueInterval": "2026-10-09T21:30:00.000-04:00", "MarginalValue": 0, "HourEnd": "22"}, {"BeginDate": "2026-10-09T22:30:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-09T22:30:00.000-04:00", "MarginalValue": 3.58, "HourEnd": "23"}, {"BeginDate": "2026-10-09T22:45:00.000-04:00", "ConstraintName": "NYCA Ramp Limit", "MarginalValueInterval": "2026-10-09T22:45:00.000-04:00", "MarginalValue": 0, "HourEnd": "23"}, {"BeginDate": "2026-10-09T23:30:00.000-04:00", "ConstraintName": "NYCA Ramp Limit", "MarginalValueInterval": "2026-10-09T23:30:00.000-04:00", "MarginalValue": 0, "HourEnd": "24"}]}}	{"content-type": "application/json"}	2026-10-11 03:15:34.859279	2026-10-11 03:15:35.094840
2026-10-11 03:15:34.310413	constraints_rt_15m_prelim	2026-10-08	https://webservices.iso-ne.com/api/v1.1/fifteenminuteconstraints/prelim/day/20261008.json	20261008.json	2ccd1eb6ef8b298693ef95f19239c70026b1dad94ef7a95514114530eb76e0c9	{"FifteenMinBcs": {"FifteenMinBc": [{"BeginDate": "2026-10-08T05:45:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-08T05:45:00.000-04:00", "MarginalValue": 1.33, "HourEnd": "06"}, {"BeginDate": "2026-10-08T06:45:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-08T06:45:00.000-04:00", "MarginalValue": -2.76, "HourEnd": "07"}, {"BeginDate": "2026-10-08T07:00:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-08T07:00:00.000-04:00", "MarginalValue": 3.37, "HourEnd": "08"}, {"BeginDate": "2026-10-08T08:30:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-08T08:30:00.000-04:00", "MarginalValue": 2.47, "HourEnd": "09"}, {"BeginDate": "2026-10-08T08:45:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-08T08:45:00.000-04:00", "MarginalValue": -7.6, "HourEnd": "09"}, {"BeginDate": "2026-10-08T09:15:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-08T09:15:00.000-04:00", "MarginalValue": -0.05, "HourEnd": "10"}, {"BeginDate": "2026-10-08T09:45:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-08T09:45:00.000-04:00", "MarginalValue": -0.55, "HourEnd": "10"}, {"BeginDate": "2026-10-08T10:00:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-08T10:00:00.000-04:00", "MarginalValue": 2.73, "HourEnd": "11"}, {"BeginDate": "2026-10-08T13:30:00.000-04:00", "ConstraintName": "NYCA Ramp Limit", "MarginalValueInterval": "2026-10-08T13:30:00.000-04:00", "MarginalValue": 0, "HourEnd": "14"}, {"BeginDate": "2026-10-08T17:15:00.000-04:00", "ConstraintName": "NYCA Ramp Limit", "MarginalValueInterval": "2026-10-08T17:15:00.000-04:00", "MarginalValue": 0, "HourEnd": "18"}, {"BeginDate": "2026-10-08T17:30:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-08T17:30:00.000-04:00", "MarginalValue": -0.11, "HourEnd": "18"}, {"BeginDate": "2026-10-08T21:00:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-08T21:00:00.000-04:00", "MarginalValue": 0.65, "HourEnd": "22"}, {"BeginDate": "2026-10-08T21:15:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-08T21:15:00.000-04:00", "MarginalValue": -5.97, "HourEnd": "22"}, {"BeginDate": "2026-10-08T22:00:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-08T22:00:00.000-04:00", "MarginalValue": 1.21, "HourEnd": "23"}]}}	{"content-type": "application/json"}	2026-10-11 03:15:34.327818	2026-10-11 03:15:34.507041
2026-10-11 03:15:33.794069	constraints_rt_15m_prelim	2026-10-07	https://webservices.iso-ne.com/api/v1.1/fifteenminuteconstraints/prelim/day/20261007.json	20261007.json	6fb1118701f4144cb19cc2ef27a8948492848f3176b005d5df21f5430ac06974	{"FifteenMinBcs": {"FifteenMinBc": [{"BeginDate": "2026-10-07T00:45:00.000-04:00", "ConstraintName": "NYCA Ramp Limit", "MarginalValueInterval": "2026-10-07T00:45:00.000-04:00", "MarginalValue": 0, "HourEnd": "01"}, {"BeginDate": "2026-10-07T03:45:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-07T03:45:00.000-04:00", "MarginalValue": 0.01, "HourEnd": "04"}, {"BeginDate": "2026-10-07T04:45:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-07T04:45:00.000-04:00", "MarginalValue": 0.47, "HourEnd": "05"}, {"BeginDate": "2026-10-07T05:45:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-07T05:45:00.000-04:00", "MarginalValue": 6.61, "HourEnd": "06"}, {"BeginDate": "2026-10-07T06:00:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-07T06:00:00.000-04:00", "MarginalValue": 3.06, "HourEnd": "07"}, {"BeginDate": "2026-10-07T06:15:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-07T06:15:00.000-04:00", "MarginalValue": -3.7, "HourEnd": "07"}, {"BeginDate": "2026-10-07T07:00:00.000-04:00", "ConstraintName": "NYCA Ramp Limit", "MarginalValueInterval": "2026-10-07T07:00:00.000-04:00", "MarginalValue": 0, "HourEnd": "08"}, {"BeginDate": "2026-10-07T07:15:00.000-04:00", "ConstraintName": "Flow Limit", "MarginalValueInterval": "2026-10-07T07:15:00.000-04:00", "MarginalValue": -2.37, "HourEnd": "08"}, {"BeginDate": "2026-10-07T07:30:00.000-04:00", "ConstraintName": "NYCA Ramp Limit", "MarginalValueInterval": "2026-10-07T07:30:00.000-04:00", "MarginalValue": 0, "HourEnd": "08"}, {"BeginDate": "2026-10-07T08:00:00.000-04:00", "ConstraintName": "NYCA Ramp Limit", "MarginalValueInterval": "2026-10-07T08:00:00.000-04:00", "MarginalValue": 0, "HourEnd": "09"}, {"BeginDate": "2026-10-07T08:15:00.000-04:00", "ConstraintName": "NYCA Ramp Limit", "MarginalValueInterval": "2026-10-07T08:15:00.000-04:00", "MarginalValue": 0, "HourEnd": "09"}, {"BeginDate": "2026-10-07T08:30:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-07T08:30:00.000-04:00", "MarginalValue": -1.18, "HourEnd": "09"}, {"BeginDate": "2026-10-07T08:45:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-07T08:45:00.000-04:00", "MarginalValue": 4.88, "HourEnd": "09"}, {"BeginDate": "2026-10-07T09:00:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-07T09:00:00.000-04:00", "MarginalValue": 1.63, "HourEnd": "10"}, {"BeginDate": "2026-10-07T09:15:00.000-04:00", "ConstraintName": "NYCA Ramp Limit", "MarginalValueInterval": "2026-10-07T09:15:00.000-04:00", "MarginalValue": 0, "HourEnd": "10"}, {"BeginDate": "2026-10-07T09:30:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-07T09:30:00.000-04:00", "MarginalValue": -0.18, "HourEnd": "10"}, {"BeginDate": "2026-10-07T09:45:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-07T09:45:00.000-04:00", "MarginalValue": -2.95, "HourEnd": "10"}, {"BeginDate": "2026-10-07T10:00:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-07T10:00:00.000-04:00", "MarginalValue": 2.06, "HourEnd": "11"}, {"BeginDate": "2026-10-07T10:15:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-07T10:15:00.000-04:00", "MarginalValue": 0.66, "HourEnd": "11"}, {"BeginDate": "2026-10-07T14:00:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-07T14:00:00.000-04:00", "MarginalValue": -0.27, "HourEnd": "15"}, {"BeginDate": "2026-10-07T16:00:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-07T16:00:00.000-04:00", "MarginalValue": -1.07, "HourEnd": "17"}, {"BeginDate": "2026-10-07T17:15:00.000-04:00", "ConstraintName": "NYCA Ramp Limit", "MarginalValueInterval": "2026-10-07T17:15:00.000-04:00", "MarginalValue": 0, "HourEnd": "18"}, {"BeginDate": "2026-10-07T21:15:00.000-04:00", "ConstraintName": "NYCA Ramp Limit", "MarginalValueInterval": "2026-10-07T21:15:00.000-04:00", "MarginalValue": 0, "HourEnd": "22"}, {"BeginDate": "2026-10-07T21:30:00.000-04:00", "ConstraintName": "NYCA Ramp Limit", "MarginalValueInterval": "2026-10-07T21:30:00.000-04:00", "MarginalValue": 0, "HourEnd": "22"}, {"BeginDate": "2026-10-07T22:00:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-07T22:00:00.000-04:00", "MarginalValue": 3.52, "HourEnd": "23"}, {"BeginDate": "2026-10-07T22:45:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-07T22:45:00.000-04:00", "MarginalValue": -0.64, "HourEnd": "23"}, {"BeginDate": "2026-10-07T23:00:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-07T23:00:00.000-04:00", "MarginalValue": 1.25, "HourEnd": "24"}, {"BeginDate": "2026-10-07T23:15:00.000-04:00", "ConstraintName": "NYCA Ramp Limit", "MarginalValueInterval": "2026-10-07T23:15:00.000-04:00", "MarginalValue": 0, "HourEnd": "24"}, {"BeginDate": "2026-10-07T23:45:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-07T23:45:00.000-04:00", "MarginalValue": 1.26, "HourEnd": "24"}]}}	{"content-type": "application/json"}	2026-10-11 03:15:33.811269	2026-10-11 03:15:33.953838
2026-10-11 03:15:33.344187	constraints_rt_15m_prelim	2026-10-06	https://webservices.iso-ne.com/api/v1.1/fifteenminuteconstraints/prelim/day/20261006.json	20261006.json	04adbbb7b8076352091121c3a945cb399f0e5dc29db40dc7e9137166cb4040ce	{"FifteenMinBcs": {"FifteenMinBc": [{"BeginDate": "2026-10-06T00:15:00.000-04:00", "ConstraintName": "NYCA Ramp Limit", "MarginalValueInterval": "2026-10-06T00:15:00.000-04:00", "MarginalValue": 0, "HourEnd": "01"}, {"BeginDate": "2026-10-06T00:45:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-06T00:45:00.000-04:00", "MarginalValue": -0.7, "HourEnd": "01"}, {"BeginDate": "2026-10-06T02:30:00.000-04:00", "ConstraintName": "NYCA Ramp Limit", "MarginalValueInterval": "2026-10-06T02:30:00.000-04:00", "MarginalValue": 0, "HourEnd": "03"}, {"BeginDate": "2026-10-06T03:15:00.000-04:00", "ConstraintName": "NYCA Ramp Limit", "MarginalValueInterval": "2026-10-06T03:15:00.000-04:00", "MarginalValue": 0, "HourEnd": "04"}, {"BeginDate": 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2026-10-11 03:15:32.404805	constraints_rt_15m_prelim	2026-10-04	https://webservices.iso-ne.com/api/v1.1/fifteenminuteconstraints/prelim/day/20261004.json	20261004.json	78b5e03577e3f4f1936b360949150aca6423a114cfc566e74f2ad02a16a907fe	{"FifteenMinBcs": {"FifteenMinBc": [{"BeginDate": "2026-10-04T00:45:00.000-04:00", "ConstraintName": "NYCA Ramp Limit", "MarginalValueInterval": "2026-10-04T00:45:00.000-04:00", "MarginalValue": 0, "HourEnd": "01"}, {"BeginDate": "2026-10-04T02:45:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-04T02:45:00.000-04:00", "MarginalValue": -0.8, "HourEnd": "03"}, {"BeginDate": "2026-10-04T06:15:00.000-04:00", "ConstraintName": "NYCA Ramp Limit", "MarginalValueInterval": "2026-10-04T06:15:00.000-04:00", "MarginalValue": 0, "HourEnd": "07"}, {"BeginDate": "2026-10-04T06:30:00.000-04:00", "ConstraintName": "NYCA Ramp Limit", "MarginalValueInterval": "2026-10-04T06:30:00.000-04:00", "MarginalValue": 0, "HourEnd": "07"}, {"BeginDate": "2026-10-04T07:30:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-04T07:30:00.000-04:00", "MarginalValue": 0.28, "HourEnd": "08"}, {"BeginDate": "2026-10-04T13:15:00.000-04:00", "ConstraintName": "NYCA Ramp Limit", "MarginalValueInterval": "2026-10-04T13:15:00.000-04:00", "MarginalValue": 0, "HourEnd": "14"}, {"BeginDate": "2026-10-04T13:30:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-04T13:30:00.000-04:00", "MarginalValue": -6.45, "HourEnd": "14"}, {"BeginDate": "2026-10-04T13:45:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-04T13:45:00.000-04:00", "MarginalValue": 0.17, "HourEnd": "14"}, {"BeginDate": "2026-10-04T14:00:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-04T14:00:00.000-04:00", "MarginalValue": -1.5, "HourEnd": "15"}, {"BeginDate": "2026-10-04T17:00:00.000-04:00", "ConstraintName": "Flow Limit", "MarginalValueInterval": "2026-10-04T17:00:00.000-04:00", "MarginalValue": -10.21, "HourEnd": "18"}, {"BeginDate": "2026-10-04T17:15:00.000-04:00", "ConstraintName": "Flow Limit", "MarginalValueInterval": "2026-10-04T17:15:00.000-04:00", "MarginalValue": -7.14, "HourEnd": "18"}, {"BeginDate": "2026-10-04T17:30:00.000-04:00", "ConstraintName": "Flow Limit", "MarginalValueInterval": "2026-10-04T17:30:00.000-04:00", "MarginalValue": -1.11, "HourEnd": "18"}, {"BeginDate": "2026-10-04T17:45:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-04T17:45:00.000-04:00", "MarginalValue": -1.13, "HourEnd": "18"}, {"BeginDate": "2026-10-04T18:00:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-04T18:00:00.000-04:00", "MarginalValue": 4.74, "HourEnd": "19"}, {"BeginDate": "2026-10-04T18:45:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-04T18:45:00.000-04:00", "MarginalValue": 1.84, "HourEnd": "19"}, {"BeginDate": "2026-10-04T19:00:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-04T19:00:00.000-04:00", "MarginalValue": -8.98, "HourEnd": "20"}, {"BeginDate": "2026-10-04T20:30:00.000-04:00", "ConstraintName": "NYCA Ramp Limit", "MarginalValueInterval": "2026-10-04T20:30:00.000-04:00", "MarginalValue": 0, "HourEnd": "21"}, {"BeginDate": "2026-10-04T21:00:00.000-04:00", "ConstraintName": "Flow Limit", "MarginalValueInterval": "2026-10-04T21:00:00.000-04:00", "MarginalValue": -9.98, "HourEnd": "22"}, {"BeginDate": "2026-10-04T21:15:00.000-04:00", "ConstraintName": "Flow Limit", "MarginalValueInterval": "2026-10-04T21:15:00.000-04:00", "MarginalValue": -11.1, "HourEnd": "22"}, {"BeginDate": "2026-10-04T22:00:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-04T22:00:00.000-04:00", "MarginalValue": 8.48, "HourEnd": "23"}, {"BeginDate": "2026-10-04T22:15:00.000-04:00", "ConstraintName": "NYCA Ramp Limit", "MarginalValueInterval": "2026-10-04T22:15:00.000-04:00", "MarginalValue": 0, "HourEnd": "23"}, {"BeginDate": "2026-10-04T22:30:00.000-04:00", "ConstraintName": "NYCA Ramp Limit", "MarginalValueInterval": "2026-10-04T22:30:00.000-04:00", "MarginalValue": 0, "HourEnd": "23"}, {"BeginDate": "2026-10-04T23:00:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-04T23:00:00.000-04:00", "MarginalValue": 1.97, "HourEnd": "24"}, {"BeginDate": "2026-10-04T23:45:00.000-04:00", "ConstraintName": "NYCA Ramp Limit", "MarginalValueInterval": "2026-10-04T23:45:00.000-04:00", "MarginalValue": 0, "HourEnd": "24"}]}}	{"content-type": "application/json"}	2026-10-11 03:15:32.423664	2026-10-11 03:15:32.571990
2026-10-11 03:15:30.890217	constraints_rt_15m_prelim	2026-10-03	https://webservices.iso-ne.com/api/v1.1/fifteenminuteconstraints/prelim/day/20261003.json	20261003.json	703b5ed6bd81548bab0fe5fd1221c1a2d48c7742342571228b48e09186011240	{"FifteenMinBcs": {"FifteenMinBc": [{"BeginDate": "2026-10-03T03:15:00.000-04:00", "ConstraintName": "NYCA Ramp Limit", "MarginalValueInterval": "2026-10-03T03:15:00.000-04:00", "MarginalValue": 0, "HourEnd": "04"}, {"BeginDate": "2026-10-03T03:30:00.000-04:00", "ConstraintName": "NYCA Ramp Limit", "MarginalValueInterval": "2026-10-03T03:30:00.000-04:00", "MarginalValue": 0, "HourEnd": "04"}, {"BeginDate": "2026-10-03T07:30:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-03T07:30:00.000-04:00", "MarginalValue": 3.36, "HourEnd": "08"}, {"BeginDate": "2026-10-03T08:15:00.000-04:00", "ConstraintName": "NYCA Ramp Limit", "MarginalValueInterval": "2026-10-03T08:15:00.000-04:00", "MarginalValue": 0, "HourEnd": "09"}, {"BeginDate": 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"2026-10-03T13:15:00.000-04:00", "MarginalValue": 3.42, "HourEnd": "14"}, {"BeginDate": "2026-10-03T13:30:00.000-04:00", "ConstraintName": "Flow Limit", "MarginalValueInterval": "2026-10-03T13:30:00.000-04:00", "MarginalValue": 3.41, "HourEnd": "14"}, {"BeginDate": "2026-10-03T13:45:00.000-04:00", "ConstraintName": "Flow Limit", "MarginalValueInterval": "2026-10-03T13:45:00.000-04:00", "MarginalValue": 1.15, "HourEnd": "14"}, {"BeginDate": "2026-10-03T14:00:00.000-04:00", "ConstraintName": "Flow Limit", "MarginalValueInterval": "2026-10-03T14:00:00.000-04:00", "MarginalValue": 2.28, "HourEnd": "15"}, {"BeginDate": "2026-10-03T14:15:00.000-04:00", "ConstraintName": "Flow Limit", "MarginalValueInterval": "2026-10-03T14:15:00.000-04:00", "MarginalValue": 0.95, "HourEnd": "15"}, {"BeginDate": "2026-10-03T14:30:00.000-04:00", "ConstraintName": "Flow Limit", "MarginalValueInterval": "2026-10-03T14:30:00.000-04:00", "MarginalValue": 0.3, "HourEnd": "15"}, {"BeginDate": 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"2026-10-03T21:30:00.000-04:00", "MarginalValue": 0, "HourEnd": "22"}, {"BeginDate": "2026-10-03T21:45:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-03T21:45:00.000-04:00", "MarginalValue": -0.74, "HourEnd": "22"}, {"BeginDate": "2026-10-03T23:30:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-03T23:30:00.000-04:00", "MarginalValue": 4.08, "HourEnd": "24"}, {"BeginDate": "2026-10-03T23:45:00.000-04:00", "ConstraintName": "Ramp Limit", "MarginalValueInterval": "2026-10-03T23:45:00.000-04:00", "MarginalValue": 6.91, "HourEnd": "24"}]}}	{"content-type": "application/json"}	2026-10-11 03:15:31.081012	2026-10-11 03:15:32.086044

Coverage

100.0% complete0 gap days9 days with data

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Coverage: 100.0%Days with data: 9Gaps: 0

2026

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Related congestion & constraints data

Related congestion & constraints data
Dataset	Description
Day-Ahead ConstraintsISONE · daily hourly market results	ISO-NE day-ahead transmission constraints with constraint, contingency, interface flag, and the publisher-signed marginal_value. The source values use the opposite sign from Ask the Grid's canonical shadow price, so analytical ranking should use atg.isone_constraints_da; a non-zero value is cleared day-ahead congestion evidence, not proof of a real-time binding condition.
Fifteen-minute final constraintsISONE · day publication	ISONE's Fifteen-minute final constraints. Each row preserves a publisher record, workbook row, or report document with its source member and row index. Source timestamps, units, geographic scope, and revision qualifiers are retained in record_json; event_time is collection time; completed_at is when the entire document became available.
Five-minute final constraintsISONE · day publication	ISONE's Five-minute final constraints. Each row preserves a publisher record, workbook row, or report document with its source member and row index. Source timestamps, units, geographic scope, and revision qualifiers are retained in record_json; event_time is collection time; completed_at is when the entire document became available.
Five-minute preliminary constraintsISONE · day publication	ISONE's Five-minute preliminary constraints. Each row preserves a publisher record, workbook row, or report document with its source member and row index. Source timestamps, units, geographic scope, and revision qualifiers are retained in record_json; event_time is collection time; completed_at is when the entire document became available.