Voltcast is a remote MCP server that gives an AI agent 7 tools, among them cheapest_window, get_carbon, get_forecast. It answers at https://voltcast.com/api/mcp over streamable HTTP, and it listed its tools to an anonymous client, so no sign-in was needed for that. Our probes reached it 6 of 6 times since 10 September 2026; the last check, on 19 October 2026, succeeded.
European day-ahead electricity prices (43 zones), accuracy-published forecasts, carbon, optimize.
Description as the publisher wrote it.
| Tool | What it does |
|---|---|
cheapest_window | Rank 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. Inputs: zone, duration_minutes, from, to, count, objective |
get_carbon | Carbon intensity (gCO2eq/kWh) and green score (0-100 low-carbon share) derived from the live generation mix. Inputs: zone, from, to |
get_forecast | Probabilistic 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. Inputs: zone, horizon |
get_prices | Day-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. Inputs: zone, from, to, resolution |
get_realtime_prices | Explicitly labeled real-time market prices (currently WEIM), kept separate from day-ahead curves. Requires an API key. Inputs: zone, from, to, market |
get_renewables | Day-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. Inputs: zone, from, to |
list_zones | List all supported European bidding zones with codes, names, and capabilities. No auth required. |
Every block below points at https://voltcast.com/api/mcp. Pick your client and copy.
claude mcp add --transport http voltcast https://voltcast.com/api/mcp
{
"mcpServers": {
"voltcast": {
"command": "npx",
"args": ["-y", "mcp-remote", "https://voltcast.com/api/mcp"]
}
}
}{
"mcpServers": {
"voltcast": {
"url": "https://voltcast.com/api/mcp"
}
}
}{
"servers": {
"voltcast": {
"type": "http",
"url": "https://voltcast.com/api/mcp"
}
}
}{
"context_servers": {
"voltcast": {
"url": "https://voltcast.com/api/mcp"
}
}
}{
"mcpServers": {
"voltcast": {
"serverUrl": "https://voltcast.com/api/mcp"
}
}
}{
"mcpServers": {
"voltcast": {
"url": "https://voltcast.com/api/mcp"
}
}
}name: Voltcast
version: 0.0.1
schema: v1
mcpServers:
- name: Voltcast
type: streamable-http
url: https://voltcast.com/api/mcp{
"mcpServers": {
"voltcast": {
"httpUrl": "https://voltcast.com/api/mcp"
}
}
}{
"mcpServers": {
"voltcast": {
"type": "http",
"url": "https://voltcast.com/api/mcp"
}
}
}{
"mcpServers": {
"voltcast": {
"url": "https://voltcast.com/api/mcp"
}
}
}goose://extension?url=https%3A%2F%2Fvoltcast.com%2Fapi%2Fmcp&type=streamable_http&id=voltcast&name=Voltcast
It answered our last check on 19 October 2026 in 217 ms. Over 6 checks since 10 September 2026 it answered 6. Status here comes from Neuronto's own probes, not from the publisher.
Yes. It is published by voltcast.com and served from voltcast.com, the vendor's own domain: https://voltcast.com/api/mcp.
7, as returned by the server's own tools/list on 11 September 2026: cheapest_window, get_carbon, get_forecast, get_prices, get_realtime_prices, get_renewables, list_zones.
It answered our last check on 19 October 2026 in 217 ms. Over 6 checks since 10 September 2026 it answered 6.
Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://voltcast.com/api/mcp. The exact JSON is above, with the same setup for Claude Code, Claude Desktop, VS Code, Windsurf, Zed, Gemini CLI and the rest.
It listed its tools to an anonymous client, so reading the tool list needs no key. Individual tools can still ask for credentials in their own inputs.
Publisher: com.voltcast. Endpoint host: voltcast.com. ARD identifier: urn:air:com.voltcast:mcp:voltcast.
First indexed 10 September 2026. The tools are exactly what the server returned; nothing on this page
is inferred from its name. Ranking in Neuronto search is never for sale.