Voluntary Price for the Small Consumer (PVPC) MCP Server

Fetch the Voluntary Price for the Small Consumer (PVPC) published daily by Red Eléctrica at 8:15 p.m. This includes the hourly electricity tariffs that will apply the following day for consumers billed under the 2.0 TD tariff.

🧩 Components

Tools

• fetch_prices: Fetches the Voluntary Price for the Small Consumer (PVPC) prices for a given date range and geographical area.
  • Inputs:
    • locale: Get translations for sources. Accepted values: es, en. Defaults to es.
    • startDate: Beginning of the date range to filter indicator values in iso8601 format. E.g. 2025-06-29T00:00:00.000+02:00. Defaults to the start of today.
    • endDate: End of the date range to filter indicator values in iso8601 format. E.g. 2025-06-29T23:59:59.999+02:00. Defaults to the end of today.
    • timeAggregation: How to aggregate indicator values when grouping them by time. Accepted values: sum, average. Defaults to sum.
    • timeTruncation: Tells how to truncate data time series. Accepted values: hour, day, month, year. Optional parameter.
    • geographicalAggregation: How to aggregate indicator values when grouping them by geographical ID. Accepted values: sum, average. Defaults to sum.
    • geographicalIds: Tells the geographical IDs to filter indicator values. Accepted values: 3 (España), 8741 (Península), 8742 (Canarias), 8743 (Baleares), 8744 (Ceuta), 8745 (Melilla). Defaults to 8741, 8742, 8743, 8744, 8745.
    • geographicalTruncation: Tells how to group data at geographical level when the geographical aggregation is informed. Accepted values: country, electric_system. Optional parameter.
  • Returns: Text content with the PVPC prices in JSON format.

🔧 Configuration

Requirements

You need to register an API key from Esios Red Eléctrica de España to access the Esios Red Eléctrica de España API.

You will find the API documentation at API e·sios Documentation.

Claude Desktop

Remote Server Connection

Open Claude Desktop and navigate to Settings > Connectors > Add Custom Connector. Enter the name as PVPC and the remote MCP server URL like https://mcp.example.com/mcp.

Local Server Connection

Add this to your Claude Desktop claude_desktop_config.json file. See Claude Desktop MCP docs for more info.

{
  "mcpServers": {
    "pvpc": {
      "command": "npx",
      "args": ["-y", "@rfdez/pvpc-mcp-server@latest", "--api-key", "your_esios_api_key"]
    }
  }
}

💻 Development

Clone this repository and install the dependencies:

npm install

Build the project:

npm run build

Run the server:

node dist/index.js

CLI Arguments

pvpc-mcp-server accepts the following CLI flags:

• --transport <stdio|http>: Transport to use (stdio by default).
• --port <number>: Port to listen on when using http transport (default 8080).
• --api-key <key>: Your e·sios API key for authentication.

Example with http transport and port 8080:

node dist/index.js --transport http --port 8080

Example with stdio transport:

node dist/index.js --transport stdio --api-key YOUR_ESIOS_API_KEY

Local Configuration Example

{
  "mcpServers": {
    "pvpc": {
      "command": "npx",
      "args": ["-y", "tsx", "/path/to/folder/pvpc-mcp-server/src/index.ts", "--api-key", "YOUR_ESIOS_API_KEY"]
    }
  }
}

Testing with MCP Inspector

npx -y @modelcontextprotocol/inspector npx -y @rfdez/pvpc-mcp-server