voltcast

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

CommunityOnlineNo sign-inGlobalFreeCan modify data

What it can do

    What data it sees

    Do you need an account

    No: the server works without sign-in

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

    How to connect

    How to connect voltcast to Claude

    The server address to paste into Claude settings:

    https://voltcast.com/api/mcp

    1. Open Claude (claude.ai or the desktop app).
    2. Go to Settings → Connectors.
    3. Click Add custom connector.
    4. Paste the server address copied below into Remote MCP server URL and click Add.
    5. In a chat, click + → Connectors and switch the new connector on.

    Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

    Authorization

    After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

    How to connect voltcast to ChatGPT

    The server address to paste into ChatGPT settings:

    https://voltcast.com/api/mcp

    1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
    2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
    3. Open Settings → Connectors and click Create.
    4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
    5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
    6. In a new chat open + → Apps/Connectors and enable the connector.

    OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

    Authorization

    On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

    How to connect voltcast to Cursor

    The server address to paste into Cursor settings:

    https://voltcast.com/api/mcp

    Fastest: click Open in Cursor below and confirm the prompt.

    Manually:

    1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
    2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
    3. Save the file. The server appears in the MCP list; authorize it there if asked.

    Authorization

    If the service needs sign-in, an authorize button appears next to the server in the MCP list.

    Server tool list (7)

    Raw names from tools/list. Only developers need these.

    list_zonesList all supported European bidding zones with codes, names, and capabilities. No auth required.
    get_pricesDay-ahead electricity prices in each zone's native currency and native market resolution. Requires an API key; Home starts at voltcast.com/register?plan=home.
    get_realtime_pricesExplicitly labeled real-time market prices (currently WEIM), kept separate from day-ahead curves. Requires an API key.
    get_forecastProbabilistic price forecast (P50 curve; P10/P90 on Pro+) up to 7 days ahead. Home and grandfathered Free keys are scoped to their selected zone. Accuracy published daily at voltcast.com/accuracy.
    get_carbonCarbon intensity (gCO2eq/kWh) and green score (0-100 low-carbon share) derived from the live generation mix.
    get_renewablesDay-ahead wind + solar generation forecasts: the TSO's official forecast AND Voltcast's own model (volt-res-1) with q10-q90 bands, beside realized generation, with head-to-head verification (who beats whom, disclosed). Pro/Scale.
    cheapest_windowRank Home+ action windows by household cost. Experimental carbon/balanced modes use a disclosed trailing historical production-mix profile—not a forward carbon forecast—and support no emissions-reduction claim.