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Promillerechner MCP server

Which MCP servers are Promillerechner'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 2026-10-26

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Whose server it is
  • Registry namede.alcometer/mcpverified in the MCP registry

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

When we asked itchecked 2026-10-26
  • Stateanswerschecked 2026-10-26
  • Tools3
  • Server calls itselfalcometer
  • Server version1.0.0
  • Protocol version2025-06-18

On 2026-10-26 the server answered initialize and tools/list without a sign-in. First answer in 161 ms.

Should an agent connect itNot proven either way yet
  • Its tools do every use case we checked: estimate blood alcohol level after drinking; compare alcohol grams in common drinks.
  • Checked on 1 of the 7 days it takes to judge reliability.

Once connected

  • For "estimate blood alcohol level after drinking", the likely first call is estimate_blood_alcohol.
  • For "compare alcohol grams in common drinks", the likely first call is list_drinks.
  • Parameters are untyped or undescribed in 1 of 3 tools: check arguments before calling.

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: 1, the first on 2026-10-26
  • INITE MCP scoreafter a weeka score needs 7 daily checks: 1 so far
  • What an agent can do with it2 of 2 use cases
  • Answeredmeasuring1 of the 7 daily checks it takes to print a share
  • Median first answer661 ms
  • Space in an agent's context≈ 502 tokensthe definitions of all its tools (3), which an agent carries on every turn
  • Tool definitionsA · 94 of 100
  • Typed results0 of 3 toolsdeclared outputSchema: results come typed, read once
  • Parameters without a description: in 1 of 3

What an agent can do with it

  • can do · estimate blood alcohol level after drinking
  • not sure · check when alcohol drops below 0.5 per mille
  • can do · compare alcohol grams in common drinks

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 offers3 tools · read 2026-10-26
  • estimate_blood_alcohol

    Estimate blood alcohol concentration in permille (g/kg, the German unit; 0.5 permille = 0.05 % BAC) from body data and drinks, using Widmark with Watson body water, a 10-30 % resorption deficit and 0.1-0.2 permille/h elimination. Returns…

  • list_drinks

    Typical German drink servings with volume, alcohol by volume and grams of pure alcohol. Use the ids in estimate_blood_alcohol.

  • german_drink_driving_limits

    The blood alcohol limits in German road traffic (0.0, 0.3, 0.5, 1.1, 1.6 permille): who they apply to and the legal consequences (fines, points, driving bans, criminal offence). Text in German.

How to connect

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

{
  "mcpServers": {
    "alcometer": {
      "type": "http",
      "url": "https://www.alcometer.de/mcp"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http alcometer https://www.alcometer.de/mcp

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://www.alcometer.de/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.