Query New Zealand's real-time wholesale electricity prices and dispatch data from the Electricity Authority's EMI API
domain: ea.govt.nz · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Confirm the current API host before integrating: the historical developer portal at emi.developer.azure-api.net is being retired as EMI is wound down in favor of the Electricity Authority's 'Data & insights' hub at ea.govt.nz/data-and-insights/tools-and-apis/.
Subscribe to an API product and obtain a subscription key, sent as an Ocp-Apim-Subscription-Key header.
Query real-time-prices for 5-minute indicative prices and real-time-dispatch for dispatch price plus point-of-connection load/generation.
Query forecast-nrss/forecast-prss for short-horizon (roughly 8 trading periods ahead) forecast prices.
Filter results using OData-style $filter query parameters, e.g. on PointOfConnectionCode.
Known gotchas
Final settlement prices are not exposed by these APIs — only real-time/dispatch and short-horizon forecast prices are available; get final prices from separate downloadable EMI datasets.
The API database only retains roughly the last 30 days of real-time data — build your own archive if you need history.
This API is mid-migration as EMI is decommissioned; verify the live endpoint against ea.govt.nz/data-and-insights before hardcoding the older Azure API Management host.
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