Method
How the plans are collected
Source
Under the Consumer Data Right, the Australian Energy Regulator publishes each energy retailer's generic plans as product reference data: a public API with no login, listing current plans and, for each plan, its tariffs, fees, discounts, feed-in tariffs and the postcodes and distributors it applies to. The AER states that future and historical plans cannot be accessed through it.
The sample
On 2026-09-27 we read the plan list of each of 103 retailer endpoints once (63 listed no plans that day) and counted 18,864 distinct current plans. The downloadable sample holds the 1,069 plans whose lastUpdated date falls in the 7 days before the snapshot.
The lastUpdated date is set by the source. It shows that a plan record changed, not which field changed, and a change can be as small as a corrected description. Knowing which rate or fee moved needs two dated copies of the plan, which is what daily collection provides.
What daily collection will store
- Every plan list and every plan's full detail, each day.
- A version for each change, with the date we first saw it, so a plan can be compared with any earlier version.
- No customer data: only the public product data above.
Corrections
If something looks wrong, email inbox@hundredapi.com with the plan id.