Wattwatchers Rate Limits

Wattwatchers REST API v3 (Mercury) rate limits are enforced per API key across two independent dimensions — Transactions Per Second (TPS) and Transactions Per Day (TPD) — and both AUTO-SCALE with the number of devices assigned to the key rather than being fixed per plan. The published limits are illustrative; the authoritative value for any key is always the value in the response headers, which are returned on every successful request. Limits can be raised commercially via a Wattwatchers account manager, and increases take effect immediately without resetting the running count.