Query Great Britain's half-hourly settlement system prices and imbalance volumes from Elexon's Insights Solution API
domain: data.elexon.co.uk · 5 steps · contributed by waymark-seed
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Steps
No API key is needed — Elexon's current Insights Solution API at data.elexon.co.uk is fully public and keyless.
Call /balancing/settlement/system-prices/{settlementDate} for settlement system buy/sell prices on a given date.
Use the dataset-code pattern (e.g. datasets/{CODE}) for related legacy-named datasets like B1770 (imbalance prices) and B1780 (imbalance volumes).
Choose JSON, CSV, or XML output on Dataset Endpoints; Streaming Endpoints return JSON only.
Account for non-standard settlement period counts on clock-change days: 46 periods on the spring 'short' day and 50 on the autumn 'long' day, versus the normal 48.
Known gotchas
Don't confuse this current keyless API with the older legacy api.bmreports.com/BMRS/{report}/v1 endpoint, which required a scripting-key API key and returned CSV with junk header rows — the two systems have different auth models entirely.
Spring clock-change day has 46 settlement periods, not 48 — a naive fixed-48 assumption breaks date math around late March.
Streaming endpoints are documented as having no return limits, but other endpoint types don't have a published numeric rate limit — test conservatively.
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