SPP · Grid
SPP real-time market summary
The real-time market's five-minute summary for the RTO and RTO West — generation, demand response, interchange, the system marginal price and the range of prices across the footprint — a day behind.
spp-rt-market-clearingdaily, a day behind · 5m rows2 entitiesWhat is in it
- Updates
- daily, a day behind · 5m rows
- Entities
- 2 entities — SPP, SWPW…
- Source timezone
- US Central — every timestamp Dryos serves is UTC
- Coverage
- 12 September 2026 to now
- Rows held
- 2,860
- Primary key
- iso, zone, interval_start_utc
What it measures
Every value, its unit, and what the source means by it.
- System marginal price$/MWh
The system marginal price.
smp - Min LMP$/MWh
The lowest LMP in the authority.
min_lmp - Max LMP$/MWh
The highest LMP in the authority.
max_lmp - GenerationMW
Generation cleared.
generation_mw - Net interchangeMW
Net scheduled interchange, in SPP's sign.
nsi_mw
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. SPP stamps the interval's end.e.g. 2026-09-13T05:00:00Z |
| isorequired | string | Publishing ISO.e.g. SPP |
| zonerequired | string | Balancing authority: SPP for the RTO, SWPW for RTO West.e.g. SPP |
| generation_mw | number | Generation cleared, MW.e.g. 0.0 |
| cleared_dr_mw | number | Demand response cleared, MW.e.g. 0.0 |
| nsi_mw | number | Net scheduled interchange, MW, in SPP's sign.e.g. 0.0 |
| smp | number | System marginal price, $/MWh.e.g. 0.0 |
| min_lmp | number | The lowest LMP in the authority, $/MWh.e.g. 0.0 |
| max_lmp | number | The highest LMP in the authority, $/MWh.e.g. 0.0 |
| reg_up_mw | number | SPP's regulation-up figure, MW.e.g. 0.0 |
| reg_down_mw | number | SPP's regulation-down figure, MW.e.g. 0.0 |
| ramp_up_mw | number | SPP's ramp-up figure, MW.e.g. 0.0 |
| ramp_down_mw | number | SPP's ramp-down figure, MW.e.g. 0.0 |
| uncertainty_up_mw | number | SPP's uncertainty-up figure, MW.e.g. 0.0 |
| spin_mw | number | SPP's spinning-reserve figure, MW.e.g. 0.0 |
| supp_mw | number | SPP's supplemental-reserve figure, MW.e.g. 0.0 |
| capacity_available_mw | number | Capacity available, MW.e.g. 0.0 |
| source_published_at_utc | timestamp | When SPP published the row. |
| collected_at_utcrequired | timestamp | When Dryos collected this row, UTC. Stamped by the platform, not the collector.e.g. 2026-09-14T22:20:00Z |
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/spp-rt-market-clearing/query?node=SPP&limit=12"The catalogue entry — every column, its type and the source
curl "https://api.dryos.ai/v1/datasets/spp-rt-market-clearing"Hourly averages for the last day
curl "https://api.dryos.ai/v1/datasets/spp-rt-market-clearing/query?node=SPP&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 System marginal price been at SPP over the last 24 hours, and when did it peak?
Setup for every client is on the MCP server page.
Changes to this collector
A change in the collector is a change in the data. Anyone reading a step in a series is owed the day it moved under them.
- 2026-09-14
First collected, from SPP's marketplace portal.
SPP's market summary was not here. Reconciled against the live files on 2026-09-14: schema, nulls, primary key, value bands and row counts passed.
How this stream is checked
- Pulled straight from SPP Marketplace Portal · RTBM Market Clearing — 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 daily, a day behind; the interval timestamp is the start of the interval, in UTC.
- SPP publishes on US Central prevailing time, with a UTC column on every row. Every timestamp Dryos serves is UTC.
Related streams
- SPP day-ahead market summarySPP
The day-ahead market's hourly summary for the RTO and RTO West — generation, demand and virtual bids cleared, interchange and the system marginal price — posted for tomorrow each afternoon.
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