There are a few ways to get Australian energy market and carbon data into your product: build your own AEMO pipeline, use an open-data API, use a global carbon API, or use the gridIQ API. Here is an honest read on which is built for which job.
All of these options ultimately draw on the same public AEMO data. They differ in what they do with it: how much you have to build and run yourself, whether there is an analyst and alerting layer on top, whether carbon intensity comes in the same place, and whether you get a commercial support relationship. The honest answer is that more than one of these is the right choice depending on what you are building.
Competitor details below are as at June 2026. Check each provider for current capabilities and pricing before you decide.
AEMO publishes the underlying NEM data publicly for free as NEMWEB files, and WEM data is published too. If you have the engineering capacity, you have full control and no vendor dependency.
You build and then keep running the ingestion: fetching the ZIP files, parsing CSV layouts that change without notice, deduplicating, storing, backfilling and monitoring for silent breakage. And you still have only the raw market data. Carbon intensity, alerting and any analyst layer are separate builds on top.
The gridIQ API is that pipeline run as a managed service, with NEM + WEM data, a carbon-intensity feed, alerts and the Watt AI analyst already on one key, so your team ships features instead of maintaining a data pipeline.
Open Electricity (formerly OpenNEM), a project of the not-for-profit Superpower Institute, offers a genuinely good free, open, well-documented API for NEM and WEM generation, price and energy data, with Python and TypeScript clients. For open data and transparency work it is an excellent option, and the right call for many projects.
It is built for open data access, not as a commercial product. There is no embedded AI analyst, no alerts or webhooks, no Scope 2 carbon-accounting workflow, and no commercial support or SLA. Those are different jobs, outside what an open-data project sets out to do.
The gridIQ API adds the commercial layers around the data: the Watt AI analyst, alerts and webhooks, a Scope 2 oriented carbon-intensity feed, and a support relationship, with metered tiers and an SLA at the top end.
Electricity Maps is a well-regarded global carbon-intensity API covering more than 200 zones, with real-time values and forecasts out to 72 hours. If you need carbon intensity across many countries from one provider, it is purpose-built for exactly that.
It is a global generalist focused on carbon intensity. It is not an Australian market-data API, so it does not give you NEM and WEM dispatch prices, generator data, alerts or an AI analyst alongside the carbon figure.
gridIQ's carbon-intensity feed is Australia-specialist, per NEM region plus WA, grounded in AEMO generation and DCCEEW factors, and bundled with the market data and AI on one Australian key. If your footprint is global, Electricity Maps is the better fit. If it is Australian and you also want the market data, gridIQ is.
The gridIQ API is one product on one key: the Watt AI analyst, REST market data across NEM and WEM, alerts and webhooks, and the grid carbon-intensity feed. Tiers differ by monthly call volume, not by feature, starting at the Developer tier. It is the managed alternative to assembling a data pipeline, a carbon source, an alerting system and an analyst layer separately.
Every dataset traces to its primary publisher, documented on the methodology page. gridIQ is independent and not affiliated with AEMO, DCCEEW or the CER.
A few others come up. AEMO publishes developer APIs, but they are largely for registered market participants submitting bids and offers rather than a clean public REST data API for buyers. The CSIRO Data Shop offers a NEM carbon-intensity feed. Analytics tools such as NEMreview are deep on historical NEM data but are not designed as a programmatic API. If you are weighing the dashboards rather than the API, the gridIQ vs OpenNEM comparison covers that angle.
For the full landscape of Australian energy tools, see the best energy market tools in Australia.
Start a free trial and generate your first key, or read the docs to see the endpoints and the carbon feed.
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