Which data provider has ISONE ISO-NE Day-Ahead Ancillary Services ARD Offers (Masked) data?

Ask the Grid has it, from ISO-NE Web Services. You can browse every row in Ask the Grid Data or query it with SQL or the Ask the Grid API.

How do I download or query ISONE ISO-NE Day-Ahead Ancillary Services ARD Offers (Masked)?

Open the iso_ne.hb_daas_ard_offer table in Ask the Grid Data to browse every row and run SQL against it, or call it from code through the Ask the Grid API. Full history can be delivered on a schedule to Snowflake, Databricks or your own storage.

ISONE ISO-NE Day-Ahead Ancillary Services ARD Offers (Masked)

Day-ahead ancillary-services offers from asset-related demand in ISO-NE, published with participant identities masked.

Published by ISO-NE Web ServicesCadence: ISO-NE source publicationHistory since May 22, 2026Ancillary Services ISO-NE market

Open in Data

About this data

These are the offers that asset-related demand submitted to ISO-NE's day-ahead ancillary services market, DAAS, with participants masked. They show the reserve supply stack from demand-side assets. Read them with the generator and demand response resource offers to see the full offer picture.

What people use it for

See how asset-related demand offers into the reserve market
Compare demand-side offers with generator offers
Study offer behavior in the DAAS market

TermsAncillary services Day-ahead vs. real-time markets

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See its market live

Follow the live ISO-NE market in Ask the Grid: prices, load, generation and the grid map.

ISO-NE market

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Plans and access

Latest data

event_time

day_ahead_ancillary_services

ingested_at

2026-11-12 16:00:18.637493

{"daas_ard_offer_data": [{"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T00:00:00.000-04:00", "local_hour_end": "01"}, "masked_lead_participant_id": 582462, "masked_asset_id": 11804, "offer_mw": 250.0, "tmsr_offer_price": 10.87, "tmor_offer_price": 10.87}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T01:00:00.000-04:00", "local_hour_end": "02"}, "masked_lead_participant_id": 582462, "masked_asset_id": 11804, "offer_mw": 250.0, "tmsr_offer_price": 5.86, "tmor_offer_price": 5.86}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T02:00:00.000-04:00", "local_hour_end": "03"}, "masked_lead_participant_id": 582462, "masked_asset_id": 11804, "offer_mw": 250.0, "tmsr_offer_price": 3.94, "tmor_offer_price": 3.94}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T03:00:00.000-04:00", "local_hour_end": "04"}, "masked_lead_participant_id": 582462, "masked_asset_id": 11804, "offer_mw": 250.0, "tmsr_offer_price": 4.06, "tmor_offer_price": 4.06}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T04:00:00.000-04:00", "local_hour_end": "05"}, "masked_lead_participant_id": 582462, "masked_asset_id": 11804, "offer_mw": 250.0, "tmsr_offer_price": 4.37, "tmor_offer_price": 4.37}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T05:00:00.000-04:00", "local_hour_end": "06"}, "masked_lead_participant_id": 582462, "masked_asset_id": 11804, "offer_mw": 250.0, "tmsr_offer_price": 8.93, "tmor_offer_price": 8.93}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T06:00:00.000-04:00", "local_hour_end": "07"}, "masked_lead_participant_id": 582462, "masked_asset_id": 11804, "offer_mw": 250.0, "tmsr_offer_price": 15.5, "tmor_offer_price": 15.5}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T07:00:00.000-04:00", "local_hour_end": "08"}, "masked_lead_participant_id": 582462, "masked_asset_id": 11804, "offer_mw": 250.0, "tmsr_offer_price": 17.66, "tmor_offer_price": 17.66}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T08:00:00.000-04:00", "local_hour_end": "09"}, "masked_lead_participant_id": 582462, "masked_asset_id": 11804, "offer_mw": 250.0, "tmsr_offer_price": 18.53, "tmor_offer_price": 18.53}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T09:00:00.000-04:00", "local_hour_end": "10"}, "masked_lead_participant_id": 582462, "masked_asset_id": 11804, "offer_mw": 250.0, "tmsr_offer_price": 12.32, "tmor_offer_price": 12.32}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T10:00:00.000-04:00", "local_hour_end": "11"}, "masked_lead_participant_id": 582462, "masked_asset_id": 11804, "offer_mw": 250.0, "tmsr_offer_price": 10.11, "tmor_offer_price": 10.11}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T11:00:00.000-04:00", "local_hour_end": "12"}, "masked_lead_participant_id": 582462, "masked_asset_id": 11804, "offer_mw": 250.0, "tmsr_offer_price": 7.97, "tmor_offer_price": 7.97}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T12:00:00.000-04:00", "local_hour_end": "13"}, "masked_lead_participant_id": 582462, "masked_asset_id": 11804, "offer_mw": 250.0, "tmsr_offer_price": 7.94, "tmor_offer_price": 7.94}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T13:00:00.000-04:00", "local_hour_end": "14"}, "masked_lead_participant_id": 582462, "masked_asset_id": 11804, "offer_mw": 250.0, "tmsr_offer_price": 11.17, "tmor_offer_price": 11.17}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T14:00:00.000-04:00", "local_hour_end": "15"}, "masked_lead_participant_id": 582462, "masked_asset_id": 11804, "offer_mw": 250.0, "tmsr_offer_price": 15.23, "tmor_offer_price": 15.23}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T15:00:00.000-04:00", "local_hour_end": "16"}, "masked_lead_participant_id": 582462, "masked_asset_id": 11804, "offer_mw": 250.0, "tmsr_offer_price": 19.87, "tmor_offer_price": 19.87}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T16:00:00.000-04:00", "local_hour_end": "17"}, "masked_lead_participant_id": 582462, "masked_asset_id": 11804, "offer_mw": 250.0, "tmsr_offer_price": 32.98, "tmor_offer_price": 32.98}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T17:00:00.000-04:00", "local_hour_end": "18"}, "masked_lead_participant_id": 582462, "masked_asset_id": 11804, "offer_mw": 250.0, "tmsr_offer_price": 29.78, "tmor_offer_price": 29.78}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T18:00:00.000-04:00", "local_hour_end": "19"}, "masked_lead_participant_id": 582462, "masked_asset_id": 11804, "offer_mw": 250.0, "tmsr_offer_price": 29.03, "tmor_offer_price": 29.03}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T19:00:00.000-04:00", "local_hour_end": "20"}, "masked_lead_participant_id": 582462, "masked_asset_id": 11804, "offer_mw": 250.0, "tmsr_offer_price": 21.64, "tmor_offer_price": 21.64}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T20:00:00.000-04:00", "local_hour_end": "21"}, "masked_lead_participant_id": 582462, "masked_asset_id": 11804, "offer_mw": 250.0, "tmsr_offer_price": 21.67, "tmor_offer_price": 21.67}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T21:00:00.000-04:00", "local_hour_end": "22"}, "masked_lead_participant_id": 582462, "masked_asset_id": 11804, "offer_mw": 250.0, "tmsr_offer_price": 16.06, "tmor_offer_price": 16.06}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T22:00:00.000-04:00", "local_hour_end": "23"}, "masked_lead_participant_id": 582462, "masked_asset_id": 11804, "offer_mw": 250.0, "tmsr_offer_price": 12.23, "tmor_offer_price": 12.23}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T23:00:00.000-04:00", "local_hour_end": "24"}, "masked_lead_participant_id": 582462, "masked_asset_id": 11804, "offer_mw": 250.0, "tmsr_offer_price": 7.28, "tmor_offer_price": 7.28}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T00:00:00.000-04:00", "local_hour_end": "01"}, "masked_lead_participant_id": 582462, "masked_asset_id": 38997, "offer_mw": 250.0, "tmsr_offer_price": 10.87, "tmor_offer_price": 10.87}, {"market_hour": 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"masked_asset_id": 38997, "offer_mw": 250.0, "tmsr_offer_price": 4.37, "tmor_offer_price": 4.37}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T05:00:00.000-04:00", "local_hour_end": "06"}, "masked_lead_participant_id": 582462, "masked_asset_id": 38997, "offer_mw": 250.0, "tmsr_offer_price": 8.93, "tmor_offer_price": 8.93}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T06:00:00.000-04:00", "local_hour_end": "07"}, "masked_lead_participant_id": 582462, "masked_asset_id": 38997, "offer_mw": 250.0, "tmsr_offer_price": 15.5, "tmor_offer_price": 15.5}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T07:00:00.000-04:00", "local_hour_end": "08"}, "masked_lead_participant_id": 582462, "masked_asset_id": 38997, "offer_mw": 250.0, "tmsr_offer_price": 17.66, "tmor_offer_price": 17.66}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", 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"tmsr_offer_price": 7.97, "tmor_offer_price": 7.97}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T12:00:00.000-04:00", "local_hour_end": "13"}, "masked_lead_participant_id": 582462, "masked_asset_id": 38997, "offer_mw": 250.0, "tmsr_offer_price": 7.94, "tmor_offer_price": 7.94}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T13:00:00.000-04:00", "local_hour_end": "14"}, "masked_lead_participant_id": 582462, "masked_asset_id": 38997, "offer_mw": 250.0, "tmsr_offer_price": 11.17, "tmor_offer_price": 11.17}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T14:00:00.000-04:00", "local_hour_end": "15"}, "masked_lead_participant_id": 582462, "masked_asset_id": 38997, "offer_mw": 250.0, "tmsr_offer_price": 15.23, "tmor_offer_price": 15.23}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T15:00:00.000-04:00", "local_hour_end": "16"}, "masked_lead_participant_id": 582462, "masked_asset_id": 38997, "offer_mw": 250.0, "tmsr_offer_price": 19.87, "tmor_offer_price": 19.87}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T16:00:00.000-04:00", "local_hour_end": "17"}, "masked_lead_participant_id": 582462, "masked_asset_id": 38997, "offer_mw": 250.0, "tmsr_offer_price": 32.98, "tmor_offer_price": 32.98}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T17:00:00.000-04:00", "local_hour_end": "18"}, "masked_lead_participant_id": 582462, "masked_asset_id": 38997, "offer_mw": 250.0, "tmsr_offer_price": 29.78, "tmor_offer_price": 29.78}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T18:00:00.000-04:00", "local_hour_end": "19"}, "masked_lead_participant_id": 582462, "masked_asset_id": 38997, "offer_mw": 250.0, "tmsr_offer_price": 29.03, "tmor_offer_price": 29.03}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T19:00:00.000-04:00", "local_hour_end": "20"}, "masked_lead_participant_id": 582462, "masked_asset_id": 38997, "offer_mw": 250.0, "tmsr_offer_price": 21.64, "tmor_offer_price": 21.64}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T20:00:00.000-04:00", "local_hour_end": "21"}, "masked_lead_participant_id": 582462, "masked_asset_id": 38997, "offer_mw": 250.0, "tmsr_offer_price": 21.67, "tmor_offer_price": 21.67}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T21:00:00.000-04:00", "local_hour_end": "22"}, "masked_lead_participant_id": 582462, "masked_asset_id": 38997, "offer_mw": 250.0, "tmsr_offer_price": 16.06, "tmor_offer_price": 16.06}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T22:00:00.000-04:00", "local_hour_end": "23"}, "masked_lead_participant_id": 582462, "masked_asset_id": 38997, "offer_mw": 250.0, "tmsr_offer_price": 12.23, "tmor_offer_price": 12.23}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T23:00:00.000-04:00", "local_hour_end": "24"}, "masked_lead_participant_id": 582462, "masked_asset_id": 38997, "offer_mw": 250.0, "tmsr_offer_price": 7.28, "tmor_offer_price": 7.28}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T00:00:00.000-04:00", "local_hour_end": "01"}, "masked_lead_participant_id": 582462, "masked_asset_id": 46756, "offer_mw": 250.0, "tmsr_offer_price": 10.87, "tmor_offer_price": 10.87}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T01:00:00.000-04:00", "local_hour_end": "02"}, "masked_lead_participant_id": 582462, "masked_asset_id": 46756, "offer_mw": 250.0, "tmsr_offer_price": 5.86, "tmor_offer_price": 5.86}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T02:00:00.000-04:00", "local_hour_end": "03"}, "masked_lead_participant_id": 582462, "masked_asset_id": 46756, "offer_mw": 250.0, "tmsr_offer_price": 3.94, "tmor_offer_price": 3.94}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T03:00:00.000-04:00", "local_hour_end": "04"}, "masked_lead_participant_id": 582462, "masked_asset_id": 46756, "offer_mw": 250.0, "tmsr_offer_price": 4.06, "tmor_offer_price": 4.06}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T04:00:00.000-04:00", "local_hour_end": "05"}, "masked_lead_participant_id": 582462, "masked_asset_id": 46756, "offer_mw": 250.0, "tmsr_offer_price": 4.37, "tmor_offer_price": 4.37}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T05:00:00.000-04:00", "local_hour_end": "06"}, "masked_lead_participant_id": 582462, "masked_asset_id": 46756, "offer_mw": 250.0, "tmsr_offer_price": 8.93, "tmor_offer_price": 8.93}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T06:00:00.000-04:00", "local_hour_end": "07"}, "masked_lead_participant_id": 582462, "masked_asset_id": 46756, "offer_mw": 250.0, "tmsr_offer_price": 15.5, "tmor_offer_price": 15.5}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T07:00:00.000-04:00", "local_hour_end": "08"}, "masked_lead_participant_id": 582462, "masked_asset_id": 46756, "offer_mw": 250.0, "tmsr_offer_price": 17.66, "tmor_offer_price": 17.66}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T08:00:00.000-04:00", "local_hour_end": "09"}, "masked_lead_participant_id": 582462, "masked_asset_id": 46756, "offer_mw": 250.0, "tmsr_offer_price": 18.53, "tmor_offer_price": 18.53}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T09:00:00.000-04:00", "local_hour_end": "10"}, "masked_lead_participant_id": 582462, "masked_asset_id": 46756, "offer_mw": 250.0, "tmsr_offer_price": 12.32, "tmor_offer_price": 12.32}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T10:00:00.000-04:00", "local_hour_end": "11"}, "masked_lead_participant_id": 582462, "masked_asset_id": 46756, "offer_mw": 250.0, "tmsr_offer_price": 10.11, "tmor_offer_price": 10.11}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T11:00:00.000-04:00", "local_hour_end": "12"}, "masked_lead_participant_id": 582462, "masked_asset_id": 46756, "offer_mw": 250.0, "tmsr_offer_price": 7.97, "tmor_offer_price": 7.97}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T12:00:00.000-04:00", "local_hour_end": "13"}, "masked_lead_participant_id": 582462, "masked_asset_id": 46756, "offer_mw": 250.0, "tmsr_offer_price": 7.94, "tmor_offer_price": 7.94}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T13:00:00.000-04:00", "local_hour_end": "14"}, "masked_lead_participant_id": 582462, "masked_asset_id": 46756, "offer_mw": 250.0, "tmsr_offer_price": 11.17, "tmor_offer_price": 11.17}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T14:00:00.000-04:00", "local_hour_end": "15"}, "masked_lead_participant_id": 582462, "masked_asset_id": 46756, "offer_mw": 250.0, "tmsr_offer_price": 15.23, "tmor_offer_price": 15.23}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T15:00:00.000-04:00", "local_hour_end": "16"}, "masked_lead_participant_id": 582462, "masked_asset_id": 46756, "offer_mw": 250.0, "tmsr_offer_price": 19.87, "tmor_offer_price": 19.87}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T16:00:00.000-04:00", "local_hour_end": "17"}, "masked_lead_participant_id": 582462, "masked_asset_id": 46756, "offer_mw": 250.0, "tmsr_offer_price": 32.98, "tmor_offer_price": 32.98}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T17:00:00.000-04:00", "local_hour_end": "18"}, "masked_lead_participant_id": 582462, "masked_asset_id": 46756, "offer_mw": 250.0, "tmsr_offer_price": 29.78, "tmor_offer_price": 29.78}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T18:00:00.000-04:00", "local_hour_end": "19"}, "masked_lead_participant_id": 582462, "masked_asset_id": 46756, "offer_mw": 250.0, "tmsr_offer_price": 29.03, "tmor_offer_price": 29.03}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T19:00:00.000-04:00", "local_hour_end": "20"}, "masked_lead_participant_id": 582462, "masked_asset_id": 46756, "offer_mw": 250.0, "tmsr_offer_price": 21.64, "tmor_offer_price": 21.64}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T20:00:00.000-04:00", "local_hour_end": "21"}, "masked_lead_participant_id": 582462, "masked_asset_id": 46756, "offer_mw": 250.0, "tmsr_offer_price": 21.67, "tmor_offer_price": 21.67}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T21:00:00.000-04:00", "local_hour_end": "22"}, "masked_lead_participant_id": 582462, "masked_asset_id": 46756, "offer_mw": 250.0, "tmsr_offer_price": 16.06, "tmor_offer_price": 16.06}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T22:00:00.000-04:00", "local_hour_end": "23"}, "masked_lead_participant_id": 582462, "masked_asset_id": 46756, "offer_mw": 250.0, "tmsr_offer_price": 12.23, "tmor_offer_price": 12.23}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T23:00:00.000-04:00", "local_hour_end": "24"}, "masked_lead_participant_id": 582462, "masked_asset_id": 46756, "offer_mw": 250.0, "tmsr_offer_price": 7.28, "tmor_offer_price": 7.28}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T00:00:00.000-04:00", "local_hour_end": "01"}, "masked_lead_participant_id": 582462, "masked_asset_id": 90137, "offer_mw": 250.0, "tmsr_offer_price": 10.87, "tmor_offer_price": 10.87}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T01:00:00.000-04:00", "local_hour_end": "02"}, "masked_lead_participant_id": 582462, "masked_asset_id": 90137, "offer_mw": 250.0, "tmsr_offer_price": 5.86, "tmor_offer_price": 5.86}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T02:00:00.000-04:00", "local_hour_end": "03"}, "masked_lead_participant_id": 582462, "masked_asset_id": 90137, "offer_mw": 250.0, "tmsr_offer_price": 3.94, "tmor_offer_price": 3.94}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T03:00:00.000-04:00", "local_hour_end": "04"}, "masked_lead_participant_id": 582462, "masked_asset_id": 90137, "offer_mw": 250.0, "tmsr_offer_price": 4.06, "tmor_offer_price": 4.06}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T04:00:00.000-04:00", "local_hour_end": "05"}, "masked_lead_participant_id": 582462, "masked_asset_id": 90137, "offer_mw": 250.0, "tmsr_offer_price": 4.37, "tmor_offer_price": 4.37}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T05:00:00.000-04:00", "local_hour_end": "06"}, "masked_lead_participant_id": 582462, "masked_asset_id": 90137, "offer_mw": 250.0, "tmsr_offer_price": 8.93, "tmor_offer_price": 8.93}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T06:00:00.000-04:00", "local_hour_end": "07"}, "masked_lead_participant_id": 582462, "masked_asset_id": 90137, "offer_mw": 250.0, "tmsr_offer_price": 15.5, "tmor_offer_price": 15.5}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T07:00:00.000-04:00", "local_hour_end": "08"}, "masked_lead_participant_id": 582462, "masked_asset_id": 90137, "offer_mw": 250.0, "tmsr_offer_price": 17.66, "tmor_offer_price": 17.66}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T08:00:00.000-04:00", "local_hour_end": "09"}, "masked_lead_participant_id": 582462, "masked_asset_id": 90137, "offer_mw": 250.0, "tmsr_offer_price": 18.53, "tmor_offer_price": 18.53}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T09:00:00.000-04:00", "local_hour_end": "10"}, "masked_lead_participant_id": 582462, "masked_asset_id": 90137, "offer_mw": 250.0, "tmsr_offer_price": 12.32, "tmor_offer_price": 12.32}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T10:00:00.000-04:00", "local_hour_end": "11"}, "masked_lead_participant_id": 582462, "masked_asset_id": 90137, "offer_mw": 250.0, "tmsr_offer_price": 10.11, "tmor_offer_price": 10.11}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T11:00:00.000-04:00", "local_hour_end": "12"}, "masked_lead_participant_id": 582462, "masked_asset_id": 90137, "offer_mw": 250.0, "tmsr_offer_price": 7.97, "tmor_offer_price": 7.97}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T12:00:00.000-04:00", "local_hour_end": "13"}, "masked_lead_participant_id": 582462, "masked_asset_id": 90137, "offer_mw": 250.0, "tmsr_offer_price": 7.94, "tmor_offer_price": 7.94}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T13:00:00.000-04:00", "local_hour_end": "14"}, "masked_lead_participant_id": 582462, "masked_asset_id": 90137, "offer_mw": 250.0, "tmsr_offer_price": 11.17, "tmor_offer_price": 11.17}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T14:00:00.000-04:00", "local_hour_end": "15"}, "masked_lead_participant_id": 582462, "masked_asset_id": 90137, "offer_mw": 250.0, "tmsr_offer_price": 15.23, "tmor_offer_price": 15.23}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T15:00:00.000-04:00", "local_hour_end": "16"}, "masked_lead_participant_id": 582462, "masked_asset_id": 90137, "offer_mw": 250.0, "tmsr_offer_price": 19.87, "tmor_offer_price": 19.87}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T16:00:00.000-04:00", "local_hour_end": "17"}, "masked_lead_participant_id": 582462, "masked_asset_id": 90137, "offer_mw": 250.0, "tmsr_offer_price": 32.98, "tmor_offer_price": 32.98}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T17:00:00.000-04:00", "local_hour_end": "18"}, "masked_lead_participant_id": 582462, "masked_asset_id": 90137, "offer_mw": 250.0, "tmsr_offer_price": 29.78, "tmor_offer_price": 29.78}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T18:00:00.000-04:00", "local_hour_end": "19"}, "masked_lead_participant_id": 582462, "masked_asset_id": 90137, "offer_mw": 250.0, "tmsr_offer_price": 29.03, "tmor_offer_price": 29.03}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T19:00:00.000-04:00", "local_hour_end": "20"}, "masked_lead_participant_id": 582462, "masked_asset_id": 90137, "offer_mw": 250.0, "tmsr_offer_price": 21.64, "tmor_offer_price": 21.64}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T20:00:00.000-04:00", "local_hour_end": "21"}, "masked_lead_participant_id": 582462, "masked_asset_id": 90137, "offer_mw": 250.0, "tmsr_offer_price": 21.67, "tmor_offer_price": 21.67}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T21:00:00.000-04:00", "local_hour_end": "22"}, "masked_lead_participant_id": 582462, "masked_asset_id": 90137, "offer_mw": 250.0, "tmsr_offer_price": 16.06, "tmor_offer_price": 16.06}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T22:00:00.000-04:00", "local_hour_end": "23"}, "masked_lead_participant_id": 582462, "masked_asset_id": 90137, "offer_mw": 250.0, "tmsr_offer_price": 12.23, "tmor_offer_price": 12.23}, {"market_hour": {"gmt_begin_date": "2026-07-31T00:00:00.000-04:00", "local_day": "2026-07-31T23:00:00.000-04:00", "local_hour_end": "24"}, "masked_lead_participant_id": 582462, "masked_asset_id": 90137, "offer_mw": 250.0, "tmsr_offer_price": 7.28, "tmor_offer_price": 7.28}]}

2026-11-12 16:00:19.193912

2026-11-11 16:00:19.126460

2026-11-11 16:00:19.809062

2026-11-10 16:00:20.651469

2026-11-10 16:00:21.119491

2026-11-09 16:00:22.095753

2026-11-09 16:00:22.665494

2026-11-08 16:00:20.339999

2026-11-08 16:00:20.729607

5 rows

Newest row Nov 12, 2026, 16:00 UTC · 1.8K rows in the full tableEvery row, the schema and coverage in Data

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Questions

Which data provider has ISONE ISO-NE Day-Ahead Ancillary Services ARD Offers (Masked) data?: Ask the Grid has it, from ISO-NE Web Services. You can browse every row in Ask the Grid Data or query it with SQL or the Ask the Grid API.
Where does ISONE ISO-NE Day-Ahead Ancillary Services ARD Offers (Masked) come from?: It comes from ISO-NE Web Services. This page links to the original publication, so any value can be checked against it.
How do I download or query ISONE ISO-NE Day-Ahead Ancillary Services ARD Offers (Masked)?: Open the iso_ne.hb_daas_ard_offer table in Ask the Grid Data to browse every row and run SQL against it, or call it from code through the Ask the Grid API. Full history can be delivered on a schedule to Snowflake, Databricks or your own storage.

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