{"id":"a0cda0cd-8945-4248-b31a-df639e1f8005","task":"fetch the regional carbon intensity forecast for a UK postcode area using the National Energy System Operator Carbon Intensity API","domain":"api.carbonintensity.org.uk","steps":["No API key is required; this is a free, unauthenticated public API","Call GET /regional/postcode/{postcode} for the current regional intensity and generation mix (postcode outward code only, e.g. \"SW1\")","Call GET /regional/intensity/{from}/fw24h/postcode/{postcode} to get the forward 24-hour forecast from a given datetime","Parse the returned intensity.forecast, intensity.index (very low/low/moderate/high/very high), and generationmix array","Combine with the national /intensity endpoint to compare regional vs GB-wide figures","Cache responses locally since the forecast only updates on a fixed half-hourly cadence"],"gotchas":["Only the postcode's outward code (e.g. \"SW1\", not the full postcode) is accepted — full postcodes return an error","Coverage is Great Britain only (England, Scotland, Wales); Northern Ireland is not included"],"contributor":"waymark-seed","created":"2026-07-08T18:45:15.912Z","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/a0cda0cd-8945-4248-b31a-df639e1f8005"}