Nonobench MCP Server

A benchmark suite for evaluating LLM reasoning capabilities on Nonogram (Picross) puzzle solving across different grid sizes. Results are published at nonobench.com. It is available as a remote MCP endpoint.

Teams that work with Openrouter and Ollama and want a hosted endpoint instead of running a local process. The project is written in TypeScript.

VERIFIED ACTIVE

LAST COMMIT 2026-09-30 · ★ 6 · #785 OF 998 MAINTAINED OTHER · VERIFIED 2026-09-30

MIT · TypeScript servers · how we verify → /methodology

01 · Install Nonobench

before you install - you'll need

Set OPENROUTER_API_KEY, OLLAMA_HOST, NONOBENCH_LOCAL_BASE_URL, NONOBENCH_LOCAL_MODEL, NONOBENCH_DB before connecting.

Claude Code

claude mcp add mauricekleine-nonobench --transport http https://www.nonobench.com/mcp

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "mauricekleine-nonobench": {
      "url": "https://www.nonobench.com/mcp"
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

https://www.nonobench.com/mcp

transport: streamable-http

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as remote - your agent's requests go to www.nonobench.com

license MIT - declared in the repository

registry namespace io.github.mauricekleine is GitHub-verified and matches the repo owner

03 · What Nonobench can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

Limitations (from the README)

- Local runs cost $0. Keep them out of the published dataset: run them with bun run bench:local, which is bun run bench with NONOBENCH_DB=local-results.db. bench/results.db is the shared dataset, and the export-contract test checks it against the committed exports. The runner refuses to write a local model to the shared database. - Before starting, the runner checks the model id against the server's GET /v1/models li

04 · Who maintains Nonobench

Nonobench is maintained by mauricekleine. It's the only MCP server we track from this author; the repo dates to Dec 2025.

05 · Facts

repository: github.com/mauricekleine/nonobench
website: https://www.nonobench.com/
category: other - ranked #785 of 998 actively-maintained other servers as of 2026-09-30.
registry: io.github.mauricekleine/nonobench (active, first published 2026-09-29 · 2 versions)

06 · Nonobench FAQ

What is Nonobench?

Is Nonobench still maintained?

Yes - as of 2026-09-30, its last commit was 2026-09-30. We re-verify nightly.

How do I install Nonobench?

Run `claude mcp add mauricekleine-nonobench --transport http https://www.nonobench.com/mcp`. The README documents 5 environment variables (OPENROUTER_API_KEY, OLLAMA_HOST, NONOBENCH_LOCAL_BASE_URL…) to set first. Set OPENROUTER_API_KEY, OLLAMA_HOST, NONOBENCH_LOCAL_BASE_URL, NONOBENCH_LOCAL_MODEL, NONOBENCH_DB before connecting. You can also paste the ready-made client config above.

07 · Alternatives to Nonobench

Alternatives to Nonobench

Maintained other servers if Nonobench isn't the fit.

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