NYISO · Grid
NYISO interface flows
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.
nyiso-interface-flowsevery 5 min · 5m rows19 entitiesWhat is in it
- Updates
- every 5 min · 5m rows
- Entities
- 19 entities — TOTAL EAST, CENTRAL EAST - VC, SCH - PJ - NY…
- Source timezone
- US Eastern — every timestamp Dryos serves is UTC
- Coverage
- 14 September 2026 to now
- Rows held
- 22,059
- Primary key
- iso, interface, interval_start_utc
What it measures
Every value, its unit, and what the source means by it.
- FlowMW
Flow across the interface in the interval, in NYISO's sign.
flow_mw - Limit (+)MW
The limit in the positive direction; null where NYISO sets none.
positive_limit_mw - Limit (−)MW
The limit in the negative direction; null where NYISO sets none.
negative_limit_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 five-minute interval, UTC; NYISO's stamps run 00:00 to 23:55.e.g. 2026-09-13T04:00:00Z |
| isorequired | string | Publishing ISO.e.g. NYISO |
| interfacerequired | string | The interface as NYISO names it: internal ones (TOTAL EAST, CENTRAL EAST - VC, UPNY CONED, …) and the scheduled ties with neighbours (SCH - PJ - NY, …).e.g. TOTAL EAST |
| point_idrequired | string | NYISO's point ID for the interface.e.g. 23326 |
| flow_mw | number | Flow across the interface in the interval, MW, in NYISO's sign.e.g. 1952.12 |
| positive_limit_mw | number | The limit the flow is held under in the positive direction, MW.e.g. 7550 |
| negative_limit_mw | number | The limit in the negative direction, MW (a negative number).e.g. -1050 |
| 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-interface-flows/query?node=TOTAL%20EAST&limit=12"The catalogue entry — every column, its type and the source
curl "https://api.dryos.ai/v1/datasets/nyiso-interface-flows"Hourly averages for the last day
curl "https://api.dryos.ai/v1/datasets/nyiso-interface-flows/query?node=TOTAL%20EAST&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 Flow been at TOTAL EAST 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.
PJM's transfer interfaces 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 · Interface Limits and Flows — 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; 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 real-time binding constraintsNYISO
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.
every 5 min, when bound · 5m rows4 entitiesnyiso-rt-shadow-prices - 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 real-time ancillary pricesNYISO
Five-minute clearing prices for NYISO's reserves and regulation — ten-minute spinning and non-synchronous, thirty-minute operating, regulation capacity and movement — in each of its eleven zones.
every 5 min · 5m rows11 entitiesnyiso-rt-as - NYISO day-ahead ancillary pricesNYISO
Hourly day-ahead clearing prices for NYISO's reserves and regulation capacity in each of its eleven zones, posted for tomorrow each morning.
daily, morning ET · 1h rows11 entitiesnyiso-dam-as - NYISO load by zoneNYISO
Actual load every five minutes in each of NYISO's eleven zones — New York City, Long Island, the Hudson Valley and the rest of the state.
every 5 min · 5m rows11 entitiesnyiso-system-load - NYISO load forecastNYISO
NYISO's hourly load forecast six days ahead for each of its eleven zones and the state, issued each morning — every issue kept.
daily, morning ET · 1h rows12 entitiesnyiso-load-forecast-6day