"Services or tools that don't require a separate API key" matching MCP connectors:

Real-time electricity prices for AI agents. 40+ countries, 100+ zones. No auth required.

Real-time electricity prices, carbon intensity, and energy analytics for 41+ zones across Europe, GB, US, and Australia. Query live prices, compare zones, check gas storage, get green scores, and access advanced analytics via MCP.

Free solar & home energy tools: estimates, incentives by ZIP, scores, installer routing.

Browse and query the EIA API v2 — electricity, petroleum, natural gas, coal, forecasts via MCP.

Raumklima & Klimaanlage tools (Germany): BTU sizing, window seal length, heatwave forecast, costs.

Raumklima & Klimaanlage tools (Germany): BTU sizing, window seal length, heatwave forecast, costs.

Verified CO2e for any transaction, activity, flight, shipment or CBAM import. 200+ countries.

Live global intelligence: real-time markets, conflicts, country risk, chokepoints, energy. 39 tools.

Compare Japan's household fixed costs: electricity, city gas and fiber plans, and simulate bundles.

Free energy intelligence for agents: incentives, solar estimates, node scores, installer routing.

Carbon Interface MCP — Carbon Interface API (v1)

Octopus Energy public API MCP — UK energy tariffs & products.

Sourced, dated US home-energy program truth by ZIP.

EU power dispatch for wallet-enabled compute, DePIN, battery and trading agents.

FEODE: AI-accessible precision machining & testing; offshore P&A, subsea wellhead, drill-pipe

European day-ahead electricity prices (43 zones), accuracy-published forecasts, carbon, optimize.

Deutscher Preisvergleich für Solaranlagen & Balkonkraftwerke – Bestpreis-Suche (read-only).

Deutscher Preisvergleich für Strom-Produkte – Bestpreis-Suche (read-only).

Deutscher Preisvergleich für Stromspeicher – Bestpreis-Suche (read-only).

Source-cited US machine-economy data: power, AI infra, chips, robot trade + adoption, satellites.