Real-Time Ancillary-Service Capability

ERCOT's current NP6-328-CD RTC+B report of total Resource capability available for ancillary-service combinations, one row per SCED execution and AS combination.

Ancillary Services data ERCOT market

Query with the agent

Native record

ERCOT system x SCED execution x ancillary-service combination

5-minute (SCED) publication cadence

Evidence

Observed market data

Published observations from the named source

Time basis

Point-in-time records

UTC · event_time

Overview

Values are based on QSE telemetry, capped by Resource limits and, for batteries, by the service's duration requirement and available state of charge. This is the live replacement for the retired System AS Capacity Monitor, but it is capability—not procured awards, deployed reserves, or proof of a price cause.

Query contract

Use FINAL to retain one current row per (event_time, as_type). Keep the named individual and nested AS combinations distinct.

Analysis rules

Do not sum capability rows across as_type: the combination rows are nested capabilities and overlap.
For a trend, compare the same as_type across matched SCED intervals.

Related analysis

same-interval RTC+B reliability and scarcity context · exact event_time SCED match

Interpretation

Capability is telemetry-based and capped by Resource limits and storage duration/state of charge; it is not a procured award, deployed quantity, or inventory of stored MWh.
A low capability value is operating context, not proof that it caused an energy or ancillary-service price move.

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.

ERCOT MCP API reference

HTTP endpoint

POST /api/v1/datasets/ercot_total_capability_as_resources/query

Schema9

Column

Type

event_timeDateTime64(6, 'UTC')

as_typeLowCardinality(String)

total_capability_mwNullable(Float64)

dst_flagNullable(Bool)

emil_idNullable(String)

doc_idNullable(Int64)

ingested_atDateTime64(6, 'UTC')

sced_timestampNullable(String)

repeat_hour_flagNullable(Bool)

Sample data

event_time	as_type	total_capability_mw	dst_flag	emil_id	doc_id	ingested_at	sced_timestamp	repeat_hour_flag
2026-09-03 04:25:17.000000	RRS	11503.8	false	∅	∅	2026-09-03 04:30:27.912871	2026-09-02T23:25:17	false
2026-09-03 04:25:17.000000	REGUP_RRS_ECRS_NSPIN	28608.1	false	∅	∅	2026-09-03 04:30:27.912871	2026-09-02T23:25:17	false
2026-09-03 04:25:17.000000	REGUP_RRS_ECRS	19849.7	false	∅	∅	2026-09-03 04:30:27.912871	2026-09-02T23:25:17	false
2026-09-03 04:25:17.000000	REGUP_RRS	15283.1	false	∅	∅	2026-09-03 04:30:27.912871	2026-09-02T23:25:17	false
2026-09-03 04:25:17.000000	REGUP	8645.3	false	∅	∅	2026-09-03 04:30:27.912871	2026-09-02T23:25:17	false
2026-09-03 04:25:17.000000	REGDN	28402.5	false	∅	∅	2026-09-03 04:30:27.912871	2026-09-02T23:25:17	false
2026-09-03 04:25:17.000000	NSPIN	15572.3	false	∅	∅	2026-09-03 04:30:27.912871	2026-09-02T23:25:17	false
2026-09-03 04:25:17.000000	ECRS	10200.7	false	∅	∅	2026-09-03 04:30:27.912871	2026-09-02T23:25:17	false
2026-09-03 04:20:19.000000	RRS	11442.5	false	∅	∅	2026-09-03 04:30:27.912871	2026-09-02T23:20:19	false
2026-09-03 04:20:19.000000	REGUP_RRS_ECRS_NSPIN	28431.6	false	∅	∅	2026-09-03 04:30:27.912871	2026-09-02T23:20:19	false
2026-09-03 04:20:19.000000	REGUP_RRS_ECRS	19756	false	∅	∅	2026-09-03 04:30:27.912871	2026-09-02T23:20:19	false
2026-09-03 04:20:19.000000	REGUP_RRS	15207.8	false	∅	∅	2026-09-03 04:30:27.912871	2026-09-02T23:20:19	false
2026-09-03 04:20:19.000000	REGUP	8581.6	false	∅	∅	2026-09-03 04:30:27.912871	2026-09-02T23:20:19	false
2026-09-03 04:20:19.000000	REGDN	28388.9	false	∅	∅	2026-09-03 04:30:27.912871	2026-09-02T23:20:19	false
2026-09-03 04:20:19.000000	NSPIN	15458.5	false	∅	∅	2026-09-03 04:30:27.912871	2026-09-02T23:20:19	false
2026-09-03 04:20:19.000000	ECRS	10132	false	∅	∅	2026-09-03 04:30:27.912871	2026-09-02T23:20:19	false
2026-09-03 04:20:19.000000	RRS	11442.5	false	∅	∅	2026-09-03 04:25:31.509271	2026-09-02T23:20:19	false
2026-09-03 04:20:19.000000	REGUP_RRS_ECRS_NSPIN	28431.6	false	∅	∅	2026-09-03 04:25:31.509271	2026-09-02T23:20:19	false
2026-09-03 04:20:19.000000	REGUP_RRS_ECRS	19756	false	∅	∅	2026-09-03 04:25:31.509271	2026-09-02T23:20:19	false
2026-09-03 04:20:19.000000	REGUP_RRS	15207.8	false	∅	∅	2026-09-03 04:25:31.509271	2026-09-02T23:20:19	false
2026-09-03 04:20:19.000000	REGUP	8581.6	false	∅	∅	2026-09-03 04:25:31.509271	2026-09-02T23:20:19	false
2026-09-03 04:20:19.000000	REGDN	28388.9	false	∅	∅	2026-09-03 04:25:31.509271	2026-09-02T23:20:19	false
2026-09-03 04:20:19.000000	NSPIN	15458.5	false	∅	∅	2026-09-03 04:25:31.509271	2026-09-02T23:20:19	false
2026-09-03 04:20:19.000000	ECRS	10132	false	∅	∅	2026-09-03 04:25:31.509271	2026-09-02T23:20:19	false
2026-09-03 04:15:18.000000	RRS	11414.2	false	∅	∅	2026-09-03 04:30:27.912871	2026-09-02T23:15:18	false

Coverage

100.0% complete0 gap days50 days with data

Show coverage history ▾

Coverage: 100.0%Days with data: 50Gaps: 0

2026

gaplessmore

Related ancillary services data

Related ancillary services data
Dataset	Description
Ancillary Service PricesERCOT · hourly (DAM)	Hourly market clearing prices for the ancillary services ERCOT procures alongside energy in its Day-Ahead Market, broken out by product: Regulation Up (RegUp), Regulation Down (RegDown), Responsive Reserve (RRS), Non-Spinning Reserve (NSPIN), and the ERCOT Contingency Reserve Service (ECRS). These prices represent what the grid pays per megawatt to hold capacity in reserve for frequency control and contingency response, separate from the energy itself. Watching them shows when reserves are scarce and expensive (often during tight or volatile conditions), which informs how generators and storage operators allocate capacity between energy and reserve markets, and gives researchers a read on the cost of keeping the Texas grid reliable. ECRS, added in 2023, is the newest of these products and has at times cleared at notably high levels.
DAM Total AS SoldERCOT · hourly (DAM)	This dataset reports the total quantity of ancillary services ERCOT procured in its Day-Ahead Market, broken out by product (such as Regulation Up, Regulation Down, Responsive Reserve, ECRS, and Non-Spinning Reserve) for each delivery hour. These figures show how much reserve capability ERCOT set aside to keep supply and demand balanced and to respond to contingencies, separate from the energy cleared for actual generation. Paired with the per-product clearing prices, the cleared volumes let traders, researchers, and the public see how reserve requirements shift hour to hour and how much of the market's capacity is committed to grid reliability rather than energy. The data comes from ERCOT report NP4-532-CD (DAM Total AS Sold) and updates with each day-ahead market run.
ERCOT Day-Ahead Ancillary PricesERCOT · hourly (day-ahead)	Cleared day-ahead ancillary-service capacity prices in ERCOT, one row per hour and product. 365,717 rows, 2017-01 to the next delivery day. Products: reg_up, reg_down, spin, non_spin, ecrs. ERCOT procures ancillary services system-wide, so there is no region column — one price per product per hour. price_usd_mw is a price for CAPACITY held in reserve — dollars per megawatt of commitment — not dollars per megawatt-hour of energy delivered. The two are different units and are not comparable to an LMP.
Real-Time RTC+B Price AddersERCOT · 5-minute (SCED)	ERCOT's NP6-323-CD report after Real-Time Co-optimization Plus Batteries (RTC+B), one row per SCED execution. The current columns contain the Real-Time Reliability Deployment Price Adder for energy (RTRDPA), separate reliability-deployment adders for Regulation Up, Regulation Down, RRS, ECRS, and Non-Spin, plus the RUC/RMR, deployed-load, tie, and online-limit quantities describing the interval. RTRDPA is a direct component added to real-time energy LMP. Legacy ORDC columns remain only for older history and are not interchangeable with the current RTC+B fields.