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SpotWave MCP server

Which MCP servers are SpotWave's own, from the official registry and from asking its own domain, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-28

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Whose server it is
  • Registry nameeu.spotwave/pricesverified in the MCP registry

The registry name sits under spotwave.eu. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

When we asked itchecked 2026-10-28
  • Stateanswerschecked 2026-10-28
  • Tools4
  • Server calls itselfSpotWave.Api
  • Server version1.0.0.0
  • Protocol version2025-06-18

On 2026-10-28 the server answered initialize and tools/list without a sign-in. First answer in 698 ms.

Should an agent connect itNot proven either way yet
  • Whether its tools do the product's job has not been judged yet.
  • Checked on 6 of the 7 days it takes to judge reliability.

Once connected

  • For "compare live power costs across 41 European zones", the likely first call is compare_markets.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

Measured dailydaily checks: 6, the first on 2026-10-28
  • INITE MCP scoreafter a weeka score needs 7 daily checks: 6 so far
  • Answeredmeasuring6 of the 7 daily checks it takes to print a share
  • Median first answer617 ms
  • Space in an agent's context≈ 660 tokensthe definitions of all its tools (4), which an agent carries on every turn
  • Tool definitionsA · 100 of 100
  • Typed results0 of 4 toolsdeclared outputSchema: results come typed, read once
  • Every tool passes all six checks.

What an agent can do with it

  • can do · compare live power costs across 41 European zones
  • not sure · schedule appliance use around low-price hours
  • not sure · preview next day's prices after the day-ahead auction

Each of the product's use cases, put to Jev against this server's tool list: can an agent do it with these tools?

Worth a look

None of the five warning signs in these definitions.

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (25%), doing the product's job (25%), definitions (20%), context (10%), use (10%) and how readily a client connects (10%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

Tools it offers4 tools · read 2026-10-28
  • compare_markets

    Compares the current electricity price across every covered European market, sorted cheapest first by all-in price. All figures are EUR per kWh so markets are directly comparable. The snapshot is refreshed at most hourly (see asOfUtc) and…

  • list_markets

    Lists every European electricity market (bidding zone) SpotWave covers, with its code, display name and billing currency. Use the code (e.g. "NL", "DE", "SE3", "NO1", "DK1", "ITN") as the `market` argument of the other tools. Countries…

  • get_current_price

    Gets the electricity price for the current delivery period (15- or 60-minute slot) in one market: the all-in household price and the wholesale spot price, per kWh, in the market's own currency and in EUR. All-in = variable household price…

  • get_prices

    Gets one day's electricity prices for a market as hourly averages (normally 24 rows; 23 or 25 on daylight-saving change days), with the day's min, max and average and the cheapest/most expensive hour. Days are day-ahead delivery days in…

How to connect

Add the server to your MCP client config. Claude Desktop, Cursor and most other clients read this shape:

{
  "mcpServers": {
    "prices": {
      "type": "http",
      "url": "https://spotwave.eu/api/mcp"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http spotwave https://spotwave.eu/api/mcp

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://spotwave.eu/api/mcp as a custom connector in the settings.

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.