Ancillary Service Market Clearing Prices

Cleared ancillary-service prices by SPP reserve zone for both the real-time balancing market and the day-ahead market.

Ancillary Services data SPP market

Query with the agent

Native record

event_time x market_run x reserve_zone

5-minute (RTBM) and hourly (Day-Ahead) publication cadence

Evidence

Observed market data

Published observations from the named source

Time basis

Point-in-time records

UTC · event_time

Overview

SPP's product set does not map onto other ISOs': regulation clears as a separate service (capacity) price and mileage price in each direction (reg_up_service, reg_up_mile, reg_dn_service, reg_dn_mile), alongside ramp up and down, spinning, supplemental, and uncertainty products. IMPORTANT: reserve_zone mixes two grains. It carries the numeric ancillary reserve zones (1 through 5 under the SPP balancing authority, 21 under the separate SWPW balancing authority) AND the two balancing-authority roll-ups, 'SPP' and 'SWPW', whose prices equal those of their member zones. Aggregating across every value of reserve_zone double-counts the market.

Query contract

Preserve one canonical row per (event_time, market_run, reserve_zone) before aggregating.

Analysis rules

Group only after preserving the declared grain: event_time, market_run, reserve_zone.

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.

SPP MCP API reference

HTTP endpoint

POST /api/v1/datasets/spp_as_prices/query

Schema13

Column

Type

event_timeDateTime64(6, 'UTC')

market_runLowCardinality(String)

reserve_zoneLowCardinality(String)

reg_up_serviceNullable(Float64)

reg_dn_serviceNullable(Float64)

reg_up_mileNullable(Float64)

reg_dn_mileNullable(Float64)

ramp_upNullable(Float64)

ramp_dnNullable(Float64)

spinNullable(Float64)

suppNullable(Float64)

unc_upNullable(Float64)

ingested_atDateTime64(6, 'UTC')

Sample data

event_time	market_run	reserve_zone	reg_up_service	reg_dn_service	reg_up_mile	reg_dn_mile	ramp_up	spin	supp	unc_up	ingested_at
2026-09-21 04:00:00.000000	da_hourly	SWPW	0.0016	1.4508	∅	∅	0	0	0	0	2026-09-20 11:01:31.114535
2026-09-21 04:00:00.000000	da_hourly	SPP	6.4629	1.0642	∅	∅	0	0.35	0.1001	0	2026-09-20 11:01:31.114535
2026-09-21 04:00:00.000000	da_hourly	5	6.4629	1.0642	∅	∅	0	0.35	0.1001	0	2026-09-20 11:01:31.114535
2026-09-21 04:00:00.000000	da_hourly	4	6.4629	1.0642	∅	∅	0	0.35	0.1001	0	2026-09-20 11:01:31.114535
2026-09-21 04:00:00.000000	da_hourly	3	6.4629	1.0642	∅	∅	0	0.35	0.1001	0	2026-09-20 11:01:31.114535
2026-09-21 04:00:00.000000	da_hourly	21	0.0016	1.4508	∅	∅	0	0	0	0	2026-09-20 11:01:31.114535
2026-09-21 04:00:00.000000	da_hourly	2	6.4629	1.0642	∅	∅	0	0.35	0.1001	0	2026-09-20 11:01:31.114535
2026-09-21 04:00:00.000000	da_hourly	1	6.4629	1.0642	∅	∅	0	0.35	0.1001	0	2026-09-20 11:01:31.114535
2026-09-21 03:00:00.000000	da_hourly	SWPW	5.3133	0.001	∅	∅	2.9446	5.3116	5.3116	0	2026-09-20 11:01:31.114535
2026-09-21 03:00:00.000000	da_hourly	SPP	6.2989	1.5715	∅	∅	0	0.5	0.15	0	2026-09-20 11:01:31.114535
2026-09-21 03:00:00.000000	da_hourly	5	6.2989	1.5715	∅	∅	0	0.5	0.15	0	2026-09-20 11:01:31.114535
2026-09-21 03:00:00.000000	da_hourly	4	6.2989	1.5715	∅	∅	0	0.5	0.15	0	2026-09-20 11:01:31.114535
2026-09-21 03:00:00.000000	da_hourly	3	6.2989	1.5715	∅	∅	0	0.5	0.15	0	2026-09-20 11:01:31.114535
2026-09-21 03:00:00.000000	da_hourly	21	5.3133	0.001	∅	∅	2.9446	5.3116	5.3116	0	2026-09-20 11:01:31.114535
2026-09-21 03:00:00.000000	da_hourly	2	6.2989	1.5715	∅	∅	0	0.5	0.15	0	2026-09-20 11:01:31.114535
2026-09-21 03:00:00.000000	da_hourly	1	6.2989	1.5715	∅	∅	0	0.5	0.15	0	2026-09-20 11:01:31.114535
2026-09-21 02:00:00.000000	da_hourly	SWPW	7.2533	0.5026	∅	∅	6.75	6.75	6.75	0	2026-09-20 11:01:31.114535
2026-09-21 02:00:00.000000	da_hourly	SPP	6.6247	2.9515	∅	∅	0	1.252	0.75	0	2026-09-20 11:01:31.114535
2026-09-21 02:00:00.000000	da_hourly	5	6.6247	2.9515	∅	∅	0	1.252	0.75	0	2026-09-20 11:01:31.114535
2026-09-21 02:00:00.000000	da_hourly	4	6.6247	2.9515	∅	∅	0	1.252	0.75	0	2026-09-20 11:01:31.114535
2026-09-21 02:00:00.000000	da_hourly	3	6.6247	2.9515	∅	∅	0	1.252	0.75	0	2026-09-20 11:01:31.114535
2026-09-21 02:00:00.000000	da_hourly	21	7.2533	0.5026	∅	∅	6.75	6.75	6.75	0	2026-09-20 11:01:31.114535
2026-09-21 02:00:00.000000	da_hourly	2	6.6247	2.9515	∅	∅	0	1.252	0.75	0	2026-09-20 11:01:31.114535
2026-09-21 02:00:00.000000	da_hourly	1	6.6247	2.9515	∅	∅	0	1.252	0.75	0	2026-09-20 11:01:31.114535
2026-09-21 01:00:00.000000	da_hourly	SWPW	10.865	0.956	∅	∅	11.8188	9.9081	7.1545	6.6245	2026-09-20 11:01:31.114535

Coverage

100.0% complete0 gap days4,588 days with data

Show coverage history

Coverage: 100.0%Days with data: 4,588Gaps: 0

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Related ancillary services data

Related ancillary services data
Dataset	Description
Cleared Operating ReservesSPP · 5-minute	Cleared ancillary-service quantities in MW by SPP reserve zone: regulation up and down, ramp up and down, spinning, supplemental, and both uncertainty products (unc_up and the short-term sts_unc_up). The quantity counterpart to the ancillary clearing prices. The same reserve_zone caveat applies: the column carries both the numeric reserve zones and the 'SPP' and 'SWPW' balancing-authority roll-ups, so aggregating across every value double-counts.
SPP Day-Ahead Ancillary PricesSPP · hourly (day-ahead)	Cleared day-ahead ancillary-service capacity prices in SPP, one row per hour, reserve zone and product. 3,389,365 rows, 2017-01 to the next delivery day. Products: reg_up, reg_down, spin, supplemental, ramp_up, ramp_down, uncertainty_up. 8 SPP reserve zones. 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.
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.
Ancillary-Service Clearing PricesCAISO · hourly	CAISO ancillary-service market clearing prices by delivery hour, market run, region, and product. Despite the legacy column name mw_or_price, values in this table are prices in USD/MWh; zero is a valid clearing price.