Codeforces MCP Server

@pipeworx/codeforces

Codeforces public read API MCP — competitive programming users, contests, problems, submissions. Keyless.

Part of Pipeworx — an MCP gateway connecting AI agents to 1863+ live data sources. This is an independent, unofficial integration — not affiliated with, endorsed by, or published by the upstream provider.

Tools

• user(handles[]) — profile(s) by handle (up to 10k)
• user_rating(handle) — full rating history for a user
• user_status(handle, count?) — recent submissions for a user
• contest_list(gym?) — all contests (regular or gym)
• contest_standings(contest_id, handles?, from?, count?) — final scoreboard + problem list for one contest
• problemset(tags?, problemset_name?) — problemset + recent submissions stats
• recent_actions(max_count?) — recent global actions feed
• blog_entry_view(blog_id) — full blog entry by id

Standings paging is done here, not upstream

Codeforces rejects from, count and handles on public standings — it answers HTTP 400 with "Non-gym contest standings for non-admin users are available only via anonymous GET requests with no extra parameters". The only request it accepts is the bare ?contestId=<id>, which returns the entire scoreboard (2.7 MB for contest 1000, 14 MB for contest 2000).

So contest_standings streams that response and slices it here: from/count page the rows and handles filters them, with the same meaning they had before. Nothing is held in memory beyond the window you asked for. Two consequences worth knowing:

• Without a handles filter the read stops as soon as your window is full, so the response carries has_more: true instead of total_rows — the participant count is genuinely unknown at that point. Ask for a window past the end of the scoreboard, or pass handles, and you get total_rows.
• Gym contests are not available at all. Codeforces serves gym standings only to an authenticated Codeforces account and this pack is keyless, so it returns {found: false, reason: "gym_contest_requires_codeforces_account"} rather than an error.

Data source

https://codeforces.com/api/

Quick Start

Add to your MCP client (Claude Desktop, Cursor, Windsurf, etc.):

{
  "mcpServers": {
    "codeforces": {
      "url": "https://gateway.pipeworx.io/codeforces/mcp"
    }
  }
}

What this endpoint actually serves

tools/list at https://gateway.pipeworx.io/codeforces/mcp returns the tools in the table above plus the shared Pipeworx meta-tools — ask_pipeworx, discover_tools, search_within, remember/recall and the rest of the gateway-wide set. So the tool count you see is larger than this table: a single-pack endpoint currently lists roughly 30 shared tools alongside the pack's own. The connection's initialize response states its exact scope, and is the authoritative answer for a given day.

This is deliberate, not multiplexing by accident. The meta-tools are what let a scoped connection answer a question this pack does not cover — via ask_pipeworx, which routes across the whole catalog — without you adding a second MCP server. There is currently no way to mount a pack endpoint without them; if the extra schemas cost you more context than the routing is worth, connect to the full gateway once rather than to several pack endpoints.

Or connect to the full Pipeworx gateway to get every pack's tools listed directly, instead of just this one's:

{
  "mcpServers": {
    "pipeworx": {
      "url": "https://gateway.pipeworx.io/mcp"
    }
  }
}

Both URLs reach the same gateway and the same 1863+ data sources. The only difference is which pack's tools are listed directly; ask_pipeworx reaches all of them from either one.

No MCP client? Call it over HTTP

curl -X POST https://gateway.pipeworx.io/v1/tools/codeforces_user \
  -H 'Content-Type: application/json' \
  -d '{"handles":["tourist"]}'

No account needed for the first calls. Inspect any tool: GET https://gateway.pipeworx.io/v1/tools/codeforces_user. Find one: POST https://gateway.pipeworx.io/v1/tools/search_packs with {"query":"..."}.

Run it from npm

@pipeworx/mcp-codeforces is a local stdio bridge to the Pipeworx gateway: your MCP client starts it with npx, and it forwards every call to the same https://gateway.pipeworx.io/codeforces/mcp endpoint shown above. It needs network access; there is no offline mode.

{
  "mcpServers": {
    "codeforces": {
      "command": "npx",
      "args": ["-y", "@pipeworx/mcp-codeforces"]
    }
  }
}

Without a key it calls anonymously, capped at 50 calls a day. A free account raises that to 200 a day: get a key at https://pipeworx.io/signup and add "env": { "PIPEWORX_API_KEY": "<your key>" } to the server entry. The key is sent as a Bearer token, the same way a hosted connection sends it, so calls are metered and billed exactly as they are there.

It lists only this pack's tools by default. Set PIPEWORX_META_TOOLS=1 to also list ask_pipeworx and the other gateway-wide tools.

Behind an HTTPS proxy: Node's built-in fetch does not read HTTPS_PROXY by default. Newer Node releases honour it when NODE_USE_ENV_PROXY=1 is set; check your Node version's documentation.

Using with ask_pipeworx

Instead of calling tools directly, you can ask questions in plain English — this works on the pack endpoint above as well as on the full gateway:

ask_pipeworx({ question: "your question about Codeforces data" })

The gateway picks the right tool and fills the arguments automatically.

More

• Docs and guides
• pipeworx.io

License

MIT