Codeforces MCP Server
io.github.ketherworks/codeforces
answering
Codeforces MCP Server is answering right now. Last checked 8 min ago. It exposes 4 tools. Last commit 21 Jul 2026.
Search Codeforces problems and inspect public problem metadata through the official Codeforces API.
Uptime history
40 hours of history
40 hours agonow
100.0%
Uptime 24h
91 of 91 checks
4
Tools
read from the server
149 ms
Response time
average over 24h
0
Stars
last commit 21 Jul 2026
Connect this server
Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 8 min ago.
run in your terminal
claude mcp add codeforces --transport http https://codeforces-oj-mcp.lantangtang54.workers.dev/mcp~/Library/Application Support/Claude/claude_desktop_config.json
{
"mcpServers": {
"codeforces": {
"url": "https://codeforces-oj-mcp.lantangtang54.workers.dev/mcp"
}
}
}~/.codex/config.toml
[mcp_servers.codeforces]
url = "https://codeforces-oj-mcp.lantangtang54.workers.dev/mcp".cursor/mcp.json
{
"mcpServers": {
"codeforces": {
"url": "https://codeforces-oj-mcp.lantangtang54.workers.dev/mcp"
}
}
}.vscode/mcp.json
{
"mcpServers": {
"codeforces": {
"url": "https://codeforces-oj-mcp.lantangtang54.workers.dev/mcp"
}
}
}Available tools 4
Read directly from the server with tools/list, grouped by what they act on.
If a tool disappears, we record the date.
capabilities
oj_capabilities
Report audited Codeforces official API capabilities and unsupported operations.
codeforces
codeforces_get_problem_metadata
Get official metadata only. This tool does not return a problem statement or submit code.
health
oj_health
Return passive transport, schema, and persisted Codeforces upstream health.
problems
oj_search_problems
Search official Codeforces problem metadata by id, title, or tag.
Endpoints
| URL | Transport | State | Latency | Checked |
|---|---|---|---|---|
| https://codeforces-oj-mcp.lantangtang54.workers.dev/mcp | streamable-http | answering | 275 ms | 8 min ago |
Codeforces MCP Server — questions
Answers built from our own checks of this server.
What can Codeforces MCP Server do?
It exposes 4 tools, read directly from the server on our last check. Among them: codeforces_get_problem_metadata, oj_capabilities, oj_health, oj_search_problems. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README.
How MCP servers expose tools in the first place →
Is Codeforces MCP Server working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 149 ms. The bar chart above shows every period we have measured.
How do I connect Codeforces MCP Server?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Codeforces MCP Server need an API key?
No. Codeforces MCP Server completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 4 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is Codeforces MCP Server?
It answers our handshake in 149 ms on average, which is faster than 74% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.
Is Codeforces MCP Server open source?
Yes — it is published under the MIT licence, written in TypeScript and 0 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.