MCP server

PlaySudoku

io.github.vincentping/playsudoku

Checked 25 Oct 2026, 20:29 UTC · Connected to it and listed its tools

Deterministic Sudoku puzzles, progress checks, logical hints, and step-by-step solutions.

Working at last checkAbout 1,525 tokens per request once connected4 tools

https://mcp.playsudoku.us/mcp

At a glance

Type: MCP server
Publisher: Not verified
Status: Working at last check
Tools: 4
Token cost: About 1,525 tokens per request
Sets up in: Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok
Last checked: 25 Oct 2026, 20:29 UTC

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http playsudoku https://mcp.playsudoku.us/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.playsudoku]
url = "https://mcp.playsudoku.us/mcp"

Gemini CLI

{"mcpServers":{"playsudoku":{"httpUrl":"https://mcp.playsudoku.us/mcp"}}}

Cursor

{"mcpServers":{"playsudoku":{"url":"https://mcp.playsudoku.us/mcp"}}}

VS Code

{"servers":{"playsudoku":{"type":"http","url":"https://mcp.playsudoku.us/mcp"}}}

Antigravity

agy mcp add playsudoku https://mcp.playsudoku.us/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"playsudoku","server_url":"https://mcp.playsudoku.us/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"playsudoku","server_url":"https://mcp.playsudoku.us/mcp"}

check_progress ~255 tokens
Check a user's current progress against the correct solution. Returns factual information only: whether the puzzle is complete, whether all filled cells are correct, which cells are incorrect (with the entered digit), and how many cells remain empty. Does not give hints or coaching — use explain_nex
explain_next_step ~560 tokens
Get the next logical solving step for a sudoku puzzle, optionally from a partially-filled state. TWO-BOARD MODE (puzzle + progress) — use when you know both the original clue grid and the user's current work: puzzle: the original 81-char clue string (the given digits only, 0/. for empty cells).
get_sudoku_puzzle ~422 tokens
Get a random sudoku puzzle from the PlaySudoku.us collection. Puzzle is returned as an 81-character string: digits 1–9 for given cells, 0 for empty cells. The response includes the techniques required to solve the puzzle and a solve_url to the interactive solver. Difficulties: easy (30–38 givens), m
solve_sudoku ~288 tokens
Solve a sudoku puzzle completely with step-by-step logical deduction. Input: 81-character string of digits (0 or . for empty cells). Whitespace is tolerated. Returns: every solving step with technique name + human-readable explanation + action, the final solution string, a technique summary

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