Codeforces MCP Server

简体中文

Search official Codeforces problem metadata through a small MCP server.

Quick Start

Add the hosted server to your MCP configuration:

{
  "servers": {
    "codeforces": {
      "type": "http",
      "url": "https://codeforces-oj-mcp.lantangtang54.workers.dev/mcp"
    }
  }
}

The endpoint accepts anonymous read requests. It does not need an API key, Cookie, or judge account.

Then ask:

Find five beginner Codeforces problems tagged implementation.

What It Can Do

Tool	Purpose
oj_capabilities	Report the available Codeforces read operations and transport.
oj_health	Report service health and the latest official API observation.
oj_search_problems	Search the official problemset by title, id, rating, or tag.
codeforces_get_problem_metadata	Fetch one problem's official metadata by native id.

Run Locally

Requires Node.js 22 or newer.

npm ci
npm run check
npm run build
node packages/codeforces/dist/index.js

MCP client configuration from a source checkout:

{
  "servers": {
    "codeforces": {
      "type": "stdio",
      "command": "node",
      "args": ["/absolute/path/packages/codeforces/dist/index.js"]
    }
  }
}

Tagged GitHub releases attach a standalone npm tarball.

Availability

• Hosted MCP: https://codeforces-oj-mcp.lantangtang54.workers.dev/mcp
• Official MCP Registry: io.github.ketherworks/codeforces, described by server.json
• Health status: see the repository homepage or call oj_health

Source and Safety

This standalone release is generated from the reviewed Competitive Programming MCP source. The release package bundles the shared OJ contract implementation, so its runtime does not depend on unpublished workspace packages.

Platform Rules

This project is unofficial and is not affiliated with or endorsed by Codeforces.

The server exposes no run or submit tool. It accepts no judge account credentials. See SECURITY.md for the security boundary and PROVENANCE.md for the canonical source revision.

Development

npm ci
npm run check
npm run pack:check
npm run deploy:dry

License

Adapter source code is MIT licensed. Judge problem content and trademarks are not relicensed by this repository.