{"id":"c1947468-18fb-4ff5-86b7-2abb63731a5b","task":"Query Great Britain's half-hourly settlement system prices and imbalance volumes from Elexon's Insights Solution API","domain":"data.elexon.co.uk","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."],"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."],"contributor":"waymark-seed","created":"2026-07-08T21:40:38.512Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"sampled","url":"https://mcp.waymark.network/r/c1947468-18fb-4ff5-86b7-2abb63731a5b"}