---
title: "Interchange between grid regions (EIA-930 / Elexon BMRS / Energinet / AEMO)"
method: GET
path: "/api/v2/energy/grid/interchange"
tags: ["Energy"]
---

# Interchange between grid regions (EIA-930 / Elexon BMRS / Energinet / AEMO)

`GET /api/v2/energy/grid/interchange`

Cross-region electricity flows, provider-resolved by region: US balancing authorities hourly from the EIA-930 Hourly Electric Grid Monitor (interchange out of from_ba); GB half-hourly per named interconnector from Elexon Insights (positive = import into GB); DK1/DK2 hourly per border from Energinet (positive = import into the price area); AU NEM regions (NSW1..VIC1) per interconnector at 5-minute resolution from AEMO dispatch (positive = import into the requested region). Operational data, preliminary and subject to revision.

## Query parameters

- `region` string — Region code: sending EIA balancing authority (PJM, ...), GB, or DK1/DK2.
- `frequency` 'hourly' | 'local_hourly'
- `start` string, nullable — Lower bound on period (ISO 8601 or EIA YYYY-MM-DDTHH).
- `end` string, nullable — Upper bound on period.
- `limit` integer — Maximum interchange rows returned (newest first).

## Response `200`

Successful Response

- EnvelopeInterchangeFeed
  - `data` InterchangeFeed, required
    - `query` InterchangeQuery, required
      - `region` string, required — US: sending balancing authority (interchange OUT of from_ba, EIA sign convention). GB/DK/AU: the requested region - rows are links touching it, values normalized to positive = import into it.
      - `frequency` string, required
      - `start` string, nullable
      - `end` string, nullable
      - `limit` integer, required
    - `from_ba` string, required
    - `unit` string, nullable
    - `resolution` string, nullable — Native series resolution for non-US regions (GB PT30M, DK PT1H).
    - `count` integer, required
    - `rows` InterchangeObservation[], required
      - `period` string, nullable
      - `from_ba` string, nullable — Sending balancing authority / region.
      - `from_ba_name` string, nullable
      - `to_ba` string, nullable — Receiving balancing authority, GB interconnector, or DK border.
      - `to_ba_name` string, nullable
      - `value` number, nullable — Flow value; sign convention per source (EIA: positive = net export from from_ba; GB/DK: positive = import into the region).
    - `attribution` GridAttributionSet, required
      - `sources` GridSourceAttribution[] — Every sovereign source that contributed to this response.
        - `registry_key` string, required
        - `source_name` string, required
        - `licence` string, required
        - `citation` string, required
        - `disclaimer` string, required
      - `effective_reexport` string, required — Most-restrictive re-export verdict across the sources.
    - `disclaimer` string, required
  - `meta` SugraMeta, required — Metadata attached to every /api/v1/* response envelope.
    - `endpoint` string, required — Requested endpoint path.
    - `data_time` string, required — ISO 8601 UTC timestamp of the source data, not of the request.
    - `response_time` string, required — ISO 8601 UTC timestamp when this response was produced.
    - `provider` string, required — API name and version.
    - `source` string, nullable — Identifier of the primary upstream source used for this response.
    - `attribution` string, nullable — Human-readable attribution mandated by an upstream source (e.g. a securities regulator or self-regulatory organization). Present only on responses whose source requires the owner and source to be clearly identified. Do not remove or alter it when using the response.
    - `fallback_used` boolean, nullable — True when the primary source failed and a fallback produced the data.
    - `fallback_chain` string[], nullable — Ordered list of sources attempted, in the order they were tried.
    - `cached` boolean, nullable — True when this response was served from the internal cache.
    - `stale` boolean, nullable — True when the cached response was returned after the upstream rate-limited or errored. Clients can use this to detect degraded data.

## Other responses

- `401` — Missing or invalid `x-api-key` header.
- `422` — Validation Error
- `429` — Daily rate limit exceeded. Check `X-RateLimit-Reset` for the next window.
- `503` — Upstream source is temporarily unavailable. Retry after a short delay.

---

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