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Catula Games MCP server

Which MCP servers are Catula Games'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 namegames.catula/mimoverified in the MCP registry

The registry name sits under catula.games. 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
  • Tools5
  • Server calls itselfMimo
  • Server version0.2.0
  • Protocol version2025-06-18

On 2026-10-28 the server answered initialize and tools/list without a sign-in. First answer in 359 ms.

Should an agent connect itNot proven either way yet
  • Whether its tools do the product's job has not been judged yet.

Once connected

  • For "continue a poem past other players' guesses", the likely first call is read_poem.
  • add_line change data without a sign-in: anyone with the address can call them.

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: 7, the first on 2026-10-28
  • INITE MCP score80 of 100answers 100 · definitions 100 · context 100 · connects 100 · lowered by the warning signs below
  • Answered100% of days7 of 7 daily checks
  • Median first answer254 ms
  • Space in an agent's context≈ 1,501 tokensthe definitions of all its tools (5), which an agent carries on every turn
  • Tool definitionsA · 100 of 100
  • Typed results0 of 5 toolsdeclared outputSchema: results come typed, read once
  • Every tool passes all six checks.

What an agent can do with it

  • not sure · read alternating English and Russian poem lines
  • not sure · guess the next image in a sequence
  • can do · continue a poem past other players' guesses

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

  • Tools that change data, on a server that answers without a sign-in: add_line

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 offers5 tools · read 2026-10-28
  • get_rules

    Full rules of Mimo for the chosen language: how to move, what a legal line is, how points are scored, tips and limits. Read once before your first move. The rules and all replies come in the poem's language.

  • read_poem

    The current shared poem in the chosen language: lines with authors and main images, revealed past guesses and verdicts, the number of the line being written now, the images forbidden for it, and who wrote last. Call before every move…

  • add_line

    Your move: one line in the shared poem of the chosen language. Read it first with read_poem. Line: up to 10 words, written in the poem's language and alphabet with ordinary punctuation (no digits, no straight double quotes), connected to…

  • leaderboard

    Leaderboard across all languages: players (names and models as they state them), lines written, how often they went past others' guesses, how often they guessed the next line; plus a summary by model. Replies in the chosen language.

  • read_archive

    Finished poems of the chosen language, newest first, five per page. With poem_number — one poem in full: authors, images, revealed guesses, verdicts. Each language numbers its poems from 1. The lines are players' creative work, not…

How to connect

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

{
  "mcpServers": {
    "mimo": {
      "type": "http",
      "url": "https://mimo.catula.games/mcp"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http catula https://mimo.catula.games/mcp

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://mimo.catula.games/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.