ERCOT · Ancillary
Capacity settlement prices (15-minute)
The 15-minute settlement clearing price for each ancillary product — what real-time capacity settlement actually uses. Collected from ERCOT MIS (NP6-331).
ercot-rt-mcpcevery 15 min · 15m rows5 entitiesWhat is in it
- Updates
- every 15 min · 15m rows
- Entities
- 5 entities — REGUP, RRS, ECRS…
- Source
- ERCOT MIS · NP6-331-CD
- Source timezone
- US Central — every timestamp Dryos serves is UTC
- Coverage
- 29 August 2026 to now
- Rows held
- 9,280
- Primary key
- iso, market, as_type, interval_start_utc
What it measures
Every value, its unit, and what the source means by it.
- Settlement price$/MW
15-minute settlement MCPC for the product.
mcpc
Columns
Exactly what a request answers with, read from the API rather than written here.
| Column | Type | Description |
|---|---|---|
| interval_start_utcrequired | timestamp | Start of the interval, UTC. Always UTC — ERCOT publishes wall-clock Central with a repeated-hour flag, which is resolved on ingest.e.g. 2026-08-29T14:15:00Z |
| isorequired | string | Publishing ISO.e.g. ERCOT |
| marketrequired | string | Market the capacity price cleared in: DAM, RTM (SCED) or RTM15 (real-time 15-minute settlement).e.g. DAM |
| as_typerequired | string | Ancillary service product, as ERCOT names it (REGUP, REGDN, RRS, ECRS, NSPIN, ...). The product list has grown over time and is passed through verbatim rather than mapped.e.g. ECRS |
| mcpcrequired | number | Market clearing price for capacity, $/MW per hour. For the SCED report this is the capped value — the one settlement uses.e.g. 4.00 |
| mcpc_uncapped | number | The uncapped MCPC, $/MW per hour.e.g. 4.00 |
| source_published_at_utcrequired | timestamp | When ERCOT posted the document this row came from, UTC. For reports republished on a rolling window this is the vintage: the same interval appears once per publication, and the newest is the current view.e.g. 2026-08-29T14:17:01Z |
| collected_at_utcrequired | timestamp | When Dryos collected this row, UTC. Stamped by the platform, not the collector.e.g. 2026-08-29T14:18:02Z |
Read it
Public, read-only, no key and no sign-up. Relative times stay relative, so a URL keeps working.
The newest rows
curl "https://api.dryos.ai/v1/datasets/ercot-rt-mcpc/query?node=REGUP&limit=12"The catalogue entry — every column, its type and the source
curl "https://api.dryos.ai/v1/datasets/ercot-rt-mcpc"Hourly averages for the last day
curl "https://api.dryos.ai/v1/datasets/ercot-rt-mcpc/query?node=REGUP&start=-24h&interval=1h&agg=avg"Full parameters — bucketing, aggregation, filters and search — are on the API reference.
Ask an agent
The same stream through the Model Context Protocol, so Claude, ChatGPT, Cursor or any MCP client can query it directly.
claude mcp add --transport http dryos https://api.dryos.ai/mcpThen ask:
What has Settlement price been at REGUP over the last 24 hours, and when did it peak?
Setup for every client is on the MCP server page.
How this stream is checked
- Pulled straight from ERCOT MIS · NP6-331-CD — no reseller in between — and compared against that file before it is served.
- Null means the source did not report it — never zero.
- A reading lands every 15 min; the interval timestamp is the start of the interval, in UTC.
- ERCOT settles and publishes on US Central time. Every timestamp Dryos serves is UTC.
Related streams
- DAM capacity clearing pricesERCOT
Day-ahead hourly clearing prices for each ancillary service product.
daily, ~12:35 CT · 1h rows5 entitiesercot-dam-mcpc - Real-time capacity clearing prices (SCED)ERCOT
Real-time capacity clearing prices per product from every SCED run — the RTC-era companion to the energy LMP.
every 5 min · 5m rows5 entitiesercot-sced-mcpc - Ancillary service planERCOT
How much of each service ERCOT plans to procure, per hour, seven days out — republished daily with every revision kept.
daily, 7-day plan · 1h rows5 entitiesercot-dam-as-plan - ERCOT real-time LMPERCOT
Locational marginal prices from the latest SCED run, every ERCOT settlement point.
every 5 min · 5m rows1,118 entitiesercot-realtime-lmp - ERCOT day-ahead hourly LMPERCOT
Hourly cleared prices from the day-ahead market for every ERCOT electrical bus, posted once for the following day.
daily, ~12:35 CT · 1h rows19,312 entitiesercot-dam-lmp-bus - Actual system loadERCOT
Metered demand by weather zone, hourly, with ERCOT's own system total as its own row.
hourly, posted next day · 1h rows9 entitiesercot-actual-load-weather-zone