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New York Independent System Operator (NYISO)
NYISO Day-Ahead Ancillary Services Prices record
NYISO Day-Ahead Ancillary Services Prices record
Day-ahead market ancillary services clearing prices by zone. One object per row of NYISO MIS public archive CSV report P-5 (http://mis.nyiso.com/public/csv/damasp/damasp.csv). DERIVED by API Evangelist from the header row and observed values of a live file fetched on 2026-07-27; NYISO publishes no schema document for this report. Timestamps are rendered by NYISO as MM/DD/YYYY HH:MM[:SS] in Eastern time, not ISO-8601.
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Properties
Name
Type
Description
time_stamp
string
CSV column "Time Stamp"; observed example value: 07/26/2026 00:00
time_zone
string
CSV column "Time Zone"; observed example value: EDT
name
string
CSV column "Name"; observed example value: CAPITL
ptid
integer
CSV column "PTID"; observed example value: 61757
10_min_spinning_reserve_usd_per_mwh
number
CSV column "10 Min Spinning Reserve ($/MWHr)"; observed example value: 7.00
10_min_non_synchronous_reserve_usd_per_mwh
number
CSV column "10 Min Non-Synchronous Reserve ($/MWHr)"; observed example value: 7.00
30_min_operating_reserve_usd_per_mwh
number
CSV column "30 Min Operating Reserve ($/MWHr)"; observed example value: 4.00
nyca_regulation_capacity_usd_per_mwh
number
CSV column "NYCA Regulation Capacity ($/MWHr)"; observed example value: 11.00
JSON Schema
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"$id": "https://raw.githubusercontent.com/api-evangelist/nyiso/refs/heads/main/json-schema/nyiso-damasp-schema.json",
"title": "NYISO Day-Ahead Ancillary Services Prices record",
"description": "Day-ahead market ancillary services clearing prices by zone. One object per row of NYISO MIS public archive CSV report P-5 (http://mis.nyiso.com/public/csv/damasp/<YYYYMMDD>damasp.csv). DERIVED by API Evangelist from the header row and observed values of a live file fetched on 2026-07-27; NYISO publishes no schema document for this report. Timestamps are rendered by NYISO as MM/DD/YYYY HH:MM[:SS] in Eastern time, not ISO-8601.",
"x-nyiso-report": "P-5",
"x-source-url": "http://mis.nyiso.com/public/csv/damasp/20260726damasp.csv",
"x-generated": "2026-07-27",
"x-method": "derived",
"type": "object",
"properties": {
"time_stamp": {
"type": "string",
"title": "Time Stamp",
"description": "CSV column \"Time Stamp\"; observed example value: 07/26/2026 00:00"
},
"time_zone": {
"type": "string",
"title": "Time Zone",
"description": "CSV column \"Time Zone\"; observed example value: EDT"
},
"name": {
"type": "string",
"title": "Name",
"description": "CSV column \"Name\"; observed example value: CAPITL"
},
"ptid": {
"type": "integer",
"title": "PTID",
"description": "CSV column \"PTID\"; observed example value: 61757"
},
"10_min_spinning_reserve_usd_per_mwh": {
"type": "number",
"title": "10 Min Spinning Reserve ($/MWHr)",
"description": "CSV column \"10 Min Spinning Reserve ($/MWHr)\"; observed example value: 7.00"
},
"10_min_non_synchronous_reserve_usd_per_mwh": {
"type": "number",
"title": "10 Min Non-Synchronous Reserve ($/MWHr)",
"description": "CSV column \"10 Min Non-Synchronous Reserve ($/MWHr)\"; observed example value: 7.00"
},
"30_min_operating_reserve_usd_per_mwh": {
"type": "number",
"title": "30 Min Operating Reserve ($/MWHr)",
"description": "CSV column \"30 Min Operating Reserve ($/MWHr)\"; observed example value: 4.00"
},
"nyca_regulation_capacity_usd_per_mwh": {
"type": "number",
"title": "NYCA Regulation Capacity ($/MWHr)",
"description": "CSV column \"NYCA Regulation Capacity ($/MWHr)\"; observed example value: 11.00"
}
},
"required": [
"time_stamp",
"time_zone",
"name",
"ptid",
"10_min_spinning_reserve_usd_per_mwh",
"10_min_non_synchronous_reserve_usd_per_mwh",
"30_min_operating_reserve_usd_per_mwh",
"nyca_regulation_capacity_usd_per_mwh"
],
"additionalProperties": false
}