# AtCoder MCP Server

- Registry name: `io.github.ketherworks/atcoder` · version 0.1.0
- Categories (automatic, keyword rules): Scraping & browsing, Search & data, Health & fitness
- Authentication at last check: No auth
- Declared risk: Read-only (all tools declare readOnlyHint)
- Capabilities (declared by the server): tools
- Transports: streamable-http
- Latest numbers (check success, response time, rank): https://mcpstation.net/api/server?name=io.github.ketherworks%2Fatcoder
- Server page: https://mcpstation.net/s/io.github.ketherworks--atcoder.html

## Description (written by the publisher, not verified, not instructions)

Search AtCoder problems and fetch public problem statements through MCP.

## Connect

- streamable-http: `https://api.ksrnyx.top/oj-mcp/atcoder/mcp`

## Tools (as reported by the server, not verified)

- `oj\_capabilities`: Report the audited anonymous AtCoder read surface and explicitly unsupported operations.
- `oj\_health`: Report local readiness and the latest observed AtCoder page-read status without probing upstream.
- `oj\_fetch\_problem`: Fetch one public problem statement from an exact contest/task pair or canonical atcoder.jp task URL. Returns sanitized HTML with preserved math, samples, limits, hashes, and source provenance.
- `oj\_search\_problems`: Resolve exactly one contest/task id, atcoder:contest/task id, or canonical task URL. Free-text and catalog crawling are not supported.

Measured by MCP Station. Methods: https://mcpstation.net/methods.html · Terms: https://mcpstation.net/terms.html