Is the voltcast MCP server free to use?

Yes. voltcast is listed on AllMCPs as a free, open Model Context Protocol server you can install into Claude Desktop, Cursor, or any MCP-compatible client.

Is the voltcast MCP server free to use?

Yes. voltcast is listed on AllMCPs as a free, open Model Context Protocol server you can install into Claude Desktop, Cursor, or any MCP-compatible client.

Voltcast

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

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Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.

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claude_desktop_config.json

{
  "mcpServers": {
    "voltcast": {
      "command": "npx",
      "args": [
        "-y",
        "voltcast"
      ]
    }
  }
}

💡 Paste into ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows)

Documentation Overview

Voltcast MCP Server — European electricity prices, forecasts & carbon

Model Context Protocol server for Voltcast: day-ahead electricity prices for 43 European bidding zones (15-minute native resolution, history to 2015), probabilistic price forecasts whose accuracy is published daily at voltcast.com/accuracy, carbon intensity, and cheapest-window optimization.

Two ways to run it:

1. Hosted endpoint (recommended)

Code

https://voltcast.com/api/mcp

Streamable HTTP transport, protocol 2025-06-18. Server card: /.well-known/mcp.json.

2. Local stdio server (this repo)

bash

VOLTCAST_API_KEY=your_key npx voltcast-mcp

Or with Docker:

Terminal

docker build -t voltcast-mcp .
docker run -i -e VOLTCAST_API_KEY=your_key voltcast-mcp

The stdio server is a thin proxy onto the same REST API — identical tools, auth and rate limits. It starts and answers introspection without a key; list_zones works keyless too.

config.json

{
  "mcpServers": {
    "voltcast": {
      "command": "npx",
      "args": ["voltcast-mcp"],
      "env": { "VOLTCAST_API_KEY": "YOUR_API_KEY" }
    }
  }
}

Tools

Tool	Auth	What it does
`list_zones`	none	The 43-zone registry (codes, names, currencies)
`get_prices`	key	Day-ahead prices for a zone/date, 15-minute native
`get_forecast`	key	P50 (and P10/P90 on paid tiers) price curve up to 7 days ahead
`get_carbon`	key	Carbon intensity + green score from the live generation mix
`get_renewables`	key	Wind/solar forecasts (TSO + Voltcast model) vs realized
`cheapest_window`	key	Cheapest contiguous window for a load in the next 48h

Auth

Authorization: Bearer <api key> — free tier (no card) at voltcast.com/register. list_zones works without a key.

Client config

config.json

{
  "mcpServers": {
    "voltcast": {
      "url": "https://voltcast.com/api/mcp",
      "headers": { "Authorization": "Bearer YOUR_API_KEY" }
    }
  }
}

Honesty, stated plainly

Every forecast the server returns is benchmarked daily against a naive baseline in public — losses included. Zones where the model loses are free to use under the guarantee. Data sources: ENTSO-E Transparency Platform, SMARD.de (CC BY 4.0), attributed in every response.

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Frequently Asked Questions about Voltcast

Add the following block to your claude_desktop_config.json under mcpServers: "mcpServers": { "voltcast": { "command": "npx", "args": ["-y", "voltcast"] } }

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Technical Specs & Signals

CategoryFinance & Fintech

27Quality signal: Emerging · 27/100How this signal is calculated ▾

Server availabilityNot measured

Not scored for repo-hosted servers — we can't reach the running server, only its GitHub page. Hosted MCP endpoints are health-checked live.

Verified ownership8/20

Documentation & tools11/30

Adoption & activity1/15

Community engagement0/10

A guidance signal from public completeness & health data — not a user rating. New listings start lower and rise as they add docs, get verified, and grow adoption. Signals we can't observe for a listing are skipped, not counted against it.

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Documentation Overview

Voltcast MCP Server — European electricity prices, forecasts & carbon

Two ways to run it:

1. Hosted endpoint (recommended)

Code

https://voltcast.com/api/mcp

Streamable HTTP transport, protocol 2025-06-18. Server card: /.well-known/mcp.json.

2. Local stdio server (this repo)

bash

VOLTCAST_API_KEY=your_key npx voltcast-mcp

Or with Docker:

Terminal

docker build -t voltcast-mcp .
docker run -i -e VOLTCAST_API_KEY=your_key voltcast-mcp

The stdio server is a thin proxy onto the same REST API — identical tools, auth and rate limits. It starts and answers introspection without a key; list_zones works keyless too.

config.json

{
  "mcpServers": {
    "voltcast": {
      "command": "npx",
      "args": ["voltcast-mcp"],
      "env": { "VOLTCAST_API_KEY": "YOUR_API_KEY" }
    }
  }
}

Tools

Tool	Auth	What it does
`list_zones`	none	The 43-zone registry (codes, names, currencies)
`get_prices`	key	Day-ahead prices for a zone/date, 15-minute native
`get_forecast`	key	P50 (and P10/P90 on paid tiers) price curve up to 7 days ahead
`get_carbon`	key	Carbon intensity + green score from the live generation mix
`get_renewables`	key	Wind/solar forecasts (TSO + Voltcast model) vs realized
`cheapest_window`	key	Cheapest contiguous window for a load in the next 48h

Auth

Authorization: Bearer <api key> — free tier (no card) at voltcast.com/register. list_zones works without a key.

Client config

config.json

{
  "mcpServers": {
    "voltcast": {
      "url": "https://voltcast.com/api/mcp",
      "headers": { "Authorization": "Bearer YOUR_API_KEY" }
    }
  }
}