PlaySudoku is an MCP server with 4 tools an agent can call, among them check_progress, explain_next_step, get_sudoku_puzzle. It answers at https://mcp.playsudoku.us/mcp over streamable HTTP, and it listed its tools to an anonymous client, so no sign-in was needed for that. Our probes reached it 6 of 6 times since 11 September 2026; the last check, on 24 October 2026, succeeded.
Deterministic Sudoku puzzles, progress checks, logical hints, and step-by-step solutions.
Description as the publisher wrote it.
| Tool | What it does |
|---|---|
check_progress | 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 rem Inputs: puzzle, progress |
explain_next_step | 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 cl Inputs: puzzle, progress |
get_sudoku_puzzle | 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 Inputs: difficulty, technique |
solve_sudoku | 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 + act Inputs: puzzle |
Every block below points at https://mcp.playsudoku.us/mcp. Pick your client and copy.
claude mcp add --transport http playsudoku https://mcp.playsudoku.us/mcp
{
"mcpServers": {
"playsudoku": {
"command": "npx",
"args": ["-y", "mcp-remote", "https://mcp.playsudoku.us/mcp"]
}
}
}{
"mcpServers": {
"playsudoku": {
"url": "https://mcp.playsudoku.us/mcp"
}
}
}{
"servers": {
"playsudoku": {
"type": "http",
"url": "https://mcp.playsudoku.us/mcp"
}
}
}{
"context_servers": {
"playsudoku": {
"url": "https://mcp.playsudoku.us/mcp"
}
}
}{
"mcpServers": {
"playsudoku": {
"serverUrl": "https://mcp.playsudoku.us/mcp"
}
}
}{
"mcpServers": {
"playsudoku": {
"url": "https://mcp.playsudoku.us/mcp"
}
}
}name: PlaySudoku
version: 0.0.1
schema: v1
mcpServers:
- name: PlaySudoku
type: streamable-http
url: https://mcp.playsudoku.us/mcp{
"mcpServers": {
"playsudoku": {
"httpUrl": "https://mcp.playsudoku.us/mcp"
}
}
}{
"mcpServers": {
"playsudoku": {
"type": "http",
"url": "https://mcp.playsudoku.us/mcp"
}
}
}{
"mcpServers": {
"playsudoku": {
"url": "https://mcp.playsudoku.us/mcp"
}
}
}goose://extension?url=https%3A%2F%2Fmcp.playsudoku.us%2Fmcp&type=streamable_http&id=playsudoku&name=PlaySudoku
It answered our last check on 24 October 2026 in 270 ms. Over 6 checks since 11 September 2026 it answered 6. Status here comes from Neuronto's own probes, not from the publisher.
4, as returned by the server's own tools/list on 22 September 2026: check_progress, explain_next_step, get_sudoku_puzzle, solve_sudoku.
It answered our last check on 24 October 2026 in 270 ms. Over 6 checks since 11 September 2026 it answered 6.
Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://mcp.playsudoku.us/mcp. The exact JSON is above, with the same setup for Claude Code, Claude Desktop, VS Code, Windsurf, Zed, Gemini CLI and the rest.
It listed its tools to an anonymous client, so reading the tool list needs no key. Individual tools can still ask for credentials in their own inputs.
Publisher: io.github.vincentping. Endpoint host: mcp.playsudoku.us. ARD identifier: urn:air:io.github.vincentping:mcp:playsudoku.
First indexed 10 September 2026. The tools are exactly what the server returned; nothing on this page
is inferred from its name. Ranking in Neuronto search is never for sale.