Northern Powergrid Open Data Search API v1
The original Opendatasoft Search API, still live on the portal and still carrying its own interactive console. Confirmed anonymously on 2026-07-27 — GET /api/datasets/1.0/search/?rows=1 returned nhits 102, matching the v2.1 catalog count. No OpenAPI description is published by the platform for this generation of the API, so none was saved and none was written.