{"name":"GridHub API","version":"v1","docs":"/v1/zones lists coverage. Data routes: /v1/{demand|generation|price|carbon-intensity|interchange|capacity}/{zone}, /v1/latest/{zone}, /v1/map/snapshot.","auth":"Partner key via 'Authorization: Bearer <key>' (free tier) or x402 payment via 'X-PAYMENT' header. Requests without either receive HTTP 402 with payment requirements."}