# Online Judge

> Use this tool when you need to practice and improve your coding skills through competitive programming, or to automate interactions with online judge platforms. It solves problems such as accessing and managing coding challenges, submitting solutions, and tracking progress. The tool takes coding solutions and user credentials as input and outputs submission status, problem details, and progress tracking.

Canonical page: https://skillsregistry.net/skills/wangicheng-online-judge  
JSON: https://api.skillsregistry.net/v1/skills/wangicheng-online-judge

## Description

Enables interaction with Online Judge APIs for competitive programming. Lists available problems, fetches problem details with constraints and test cases, submits code solutions in multiple languages, and tracks submission status. Supports authenticated user sessions to access personal submission history and problem-solving progress.

## Trust

- **Trust score (0–1):** 0.99
- **Verification tier:** verified
- **Last scanned:** 2026-09-28

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** other
- **Updated:** 2026-09-28

## Source

- **Source listing:** [PulseMCP](https://www.pulsemcp.com/servers/wangicheng-online-judge)
- **Repository:** <https://github.com/wangicheng/oj-mcp-server>

## Use it

Resolve this record through the SkillsRegistry MCP server (no auth, read-only):

```
claude mcp add --transport http --scope user skillsregistry https://api.skillsregistry.net/mcp
```

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_skill",
    "arguments": {
      "slug": "wangicheng-online-judge"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/wangicheng-online-judge` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/wangicheng-online-judge/pull`

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SkillsRegistry indexes agent skills from public registries and GitHub. Skills we have analysed are scanned with Circle-IR and scored on six dimensions; each listing states its scan coverage. More: https://skillsregistry.net/llms.txt