# WattGap

> WattGap is the household-first, structurally-unconflicted source of truth for US home-energy
> incentives. Every fact carries its source, the date it was last verified, and a confidence
> tier that DECAYS with age, so you can trust what is fresh and discount what is stale.

## Freshness and provenance

Every served fact carries a provenance envelope: source, verified_at, confidence, confidence_base, age_days, stale, reason, as_of. `confidence` is graded (high/medium/low) and decays from its recorded tier as the fact ages
past its verification window, so a number not re-verified recently is served at lower confidence,
never as a stale `high`. `verified_at` is per fact, not a global dataset refresh date.

## Machine endpoints

- JSON API (per-ZIP energy intelligence): https://wattgap.com/api/v1/energy/profile, https://wattgap.com/api/v1/energy/rebates, https://wattgap.com/api/v1/energy/score, https://wattgap.com/api/v1/energy/rate-plans, https://wattgap.com/api/v1/energy/utility, https://wattgap.com/api/v1/energy/program-status
- OpenAPI contract (no key, no household data): https://wattgap.com/api/v1/openapi.json
- MCP server: the WattGap agent MCP surface (tool-consumable; same provenance envelope).

## Coverage

350 tracked programs across 51 states, each carrying its source and the date it was last verified.
Continuous re-verification runs in certified regions today and is expanding; every served fact is honest about its own age.

## Certified territories

- Holy Cross Energy (`holy_cross`)
- Poudre Valley REA (`poudre_valley_rea`)

## Non-negotiables (why the figures are trustworthy)

The diagnostic is never for sale. No paid party can change a score, eligibility, recommendation
ranking, or a household's top action. WattGap is not currently charging households for the
diagnostic or core guidance. Any future optional service would be clearly priced.

Generated 2026-08-20T02:29:50.877Z.