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DeducePuzzles MCP server

Which MCP servers are DeducePuzzles'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 2026-10-30

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Whose server it is
  • Registry namecom.deducepuzzles/daily-puzzleverified in the MCP registry

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

When we asked itchecked 2026-10-30
  • Stateanswerschecked 2026-10-30
  • Tools3
  • Server calls itselfDeducePuzzles
  • Server versionc488c8d8f
  • Protocol version2025-06-18

On 2026-10-30 the server answered initialize and tools/list without a sign-in. First answer in 486 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 5 of the 7 days it takes to judge reliability.

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: 5, the first on 2026-10-30
  • INITE MCP scoreafter a weeka score needs 7 daily checks: 5 so far
  • Answeredmeasuring5 of the 7 daily checks it takes to print a share
  • Median first answer333 ms
  • Space in an agent's context≈ 1,129 tokensthe definitions of all its tools (3), which an agent carries on every turn
  • Tool definitionsA · 100 of 100
  • Typed results0 of 3 toolsdeclared outputSchema: results come typed, read once
  • Every tool passes all six checks.

What an agent can do with it

  • not sure · solve one timed reasoning puzzle each day
  • not sure · read a worked walkthrough after each attempt
  • cannot · drill weak puzzle formats from the full archive

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 2026-10-30
  • get_daily_puzzle

    Use this when the user wants to play today's DeducePuzzles board or a daily bank-exam arrangement puzzle. Returns a verified single-solution puzzle at medium difficulty from a daily rotation of seating, floor, box, scheduling, and…

  • submit_attempt

    Use this when the user submits an order for today's DeducePuzzles board (seating, floor, box, scheduling, or order and ranking). Grades that one arrangement: right or wrong, attempts left, and whether the round is finished. A wrong guess…

  • get_hint

    Use this when the user asks for a hint on today's DeducePuzzles board. Names one clue to re-read, by number only. Does not reveal a person, a seat, a floor, or a rank. Do not use for a solution or a walkthrough. Attempts are counted per…

How to connect

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

{
  "mcpServers": {
    "daily-puzzle": {
      "type": "http",
      "url": "https://mcp.deducepuzzles.com/mcp"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http deducepuzzles https://mcp.deducepuzzles.com/mcp

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://mcp.deducepuzzles.com/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.