NYISO · Pricing
NYISO real-time binding constraints
Every transmission facility NYISO's real-time dispatch was up against, five minutes at a time, with the contingency it bound for and its constraint cost. Empty when nothing binds, which is a fact and not a gap.
nyiso-rt-shadow-pricesevery 5 min, when bound · 5m rows4 entitiesWhat is in it
- Updates
- every 5 min, when bound · 5m rows
- Entities
- 4 entities — SCRIBA 345 VOLNEY 345 1, MEYER 230 MEYER 1 1…
- Source timezone
- US Eastern — every timestamp Dryos serves is UTC
- Coverage
- 15 September 2026 to now
- Rows held
- 1,112
- Primary key
- iso, constraint_name, contingency, interval_start_utc
What it measures
Every value, its unit, and what the source means by it.
- Constraint cost$/MWh
NYISO's constraint cost for the interval, in its own sign.
shadow_price
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: five minutes before a real-time stamp (the interval's end); a day-ahead stamp is the hour's start.e.g. 2026-09-13T13:55:00Z |
| isorequired | string | Publishing ISO.e.g. NYISO |
| constraint_namerequired | string | The limiting facility as NYISO names it, verbatim, inner spaces kept.e.g. SCRIBA 345 VOLNEY 345 1 |
| contingencyrequired | string | The contingency the facility bound for, as NYISO lists it: BASE CASE when none, ACTIVE DNI on some day-ahead rows.e.g. SCB:SCRIBA(R935):21&FS-10 |
| facility_ptidrequired | string | NYISO's point ID for the facility.e.g. 25292 |
| shadow_pricerequired | number | NYISO's constraint cost for the interval, $/MWh — the shadow price, in NYISO's sign, which runs both ways.e.g. 589.27 |
| source_published_at_utc | timestamp | When NYISO published the row. |
| collected_at_utcrequired | timestamp | When Dryos collected this row, UTC. Stamped by the platform, not the collector.e.g. 2026-09-14T22:35:00Z |
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/nyiso-rt-shadow-prices/query?node=SCRIBA%20%20%20345%20VOLNEY%20%20%20345%201&limit=12"The catalogue entry — every column, its type and the source
curl "https://api.dryos.ai/v1/datasets/nyiso-rt-shadow-prices"Hourly averages for the last day
curl "https://api.dryos.ai/v1/datasets/nyiso-rt-shadow-prices/query?node=SCRIBA%20%20%20345%20VOLNEY%20%20%20345%201&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 Constraint cost been at SCRIBA 345 VOLNEY 345 1 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 NYISO's MIS.
CAISO's, PJM's and SPP's binding constraints were here and NYISO's were not. Reconciled against the live files on 2026-09-14: every check passed.
How this stream is checked
- Pulled straight from NYISO MIS · Real-Time Limiting Constraints — 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 5 min, when bound; the interval timestamp is the start of the interval, in UTC.
- NYISO stamps its files in Eastern prevailing time with no zone column. Every timestamp Dryos serves is UTC.
Related streams
- NYISO day-ahead binding constraintsNYISO
Every transmission facility that bound in NYISO's day-ahead market, hour by hour, with the contingency it bound for and its constraint cost, posted for tomorrow each morning.
daily, morning ET · 1h rows11 entitiesnyiso-dam-shadow-prices - NYISO day-ahead LMPNYISO
Hourly day-ahead prices at NYISO's eleven load zones, its proxies with Quebec, New England, Ontario and PJM, and every generator bus, with the energy, congestion and loss components, posted for the whole of tomorrow each morning.
daily, late morning ET · 1h rows763 entitiesnyiso-dam-lmp - NYISO real-time LMPNYISO
Real-time dispatch prices at NYISO's eleven load zones — New York City, Long Island and the rest, lettered A to K — its proxies with Quebec, New England, Ontario and PJM, and every generator bus, with the energy, congestion and loss components, every five minutes.
every 5 min · 5m rows763 entitiesnyiso-realtime-lmp - SPP real-time binding constraintsSPP
Every transmission constraint in SPP's real-time dispatch, five minutes at a time — binding, breached, or activated at a zero price — with the contingency it is monitored for, its limits and its shadow price.
every 5 min · 5m rows88 entitiesspp-rt-shadow-prices - CAISO real-time binding constraintsCAISO
Every transmission constraint CAISO's real-time dispatch was up against, five minutes at a time, with the contingency it bound for and its shadow price.
every 5 min, when bound · 5m rows28 entitiescaiso-rt-shadow-prices - NYISO interface flowsNYISO
Flow every five minutes across each of NYISO's transfer interfaces — Total East, Central East, UPNY-ConEd and the ties with PJM, New England, Ontario and Quebec — against the limits it is held to.
every 5 min · 5m rows19 entitiesnyiso-interface-flows