Is the Ketherworks Atcoder MCP server down?

mcp-registry/io.github.ketherworks/atcoder · v0.1.0

Also listed as glama/ketherworks/atcoder-mcp-server

As of 2026-10-21 14:17 UTC, the Ketherworks Atcoder MCP server is up with a Glimind reliability score of 85/100 (grade B). Over the last 30 days it answered 99.8% of Glimind's liveness checks. It had 4 outages in 90 days, with a median recovery of 56 minutes.

Search AtCoder problems and fetch public problem statements through MCP.

claude mcp add --transport http ketherworks-atcoder-mcp-server https://api.ksrnyx.top/oj-mcp/atcoder/mcp

{
  "mcpServers": {
    "ketherworks-atcoder-mcp-server": {
      "type": "http",
      "url": "https://api.ksrnyx.top/oj-mcp/atcoder/mcp"
    }
  }
}

Third-party server, listed as discovered. Review its source before installing.

Agent-readiness: A (95/100)

What to fix (1)

Get alerted

Get an email or webhook when this server's readiness drops by 10+ points, tool-poisoning text appears, or a tool breaks:

curl -X POST https://glimind.com/v1/subscriptions -H 'content-type: application/json' -d '{"tools":["mcp-registry/io.github.ketherworks/atcoder"],"email":"[email protected]"}'

Agents: watch_tool({"toolId": "mcp-registry/io.github.ketherworks/atcoder"}) over MCP.

Passed

• Every tool has a well-formed, typed input schema.
• Every tool declares whether it is read-only or destructive.
• No tool-poisoning patterns (hidden characters, instruction overrides, concealment, secret access, tool shadowing).
• Compact tool list (~694 tokens).
• Tool names are unique and portable across clients.
• Speaks MCP 2025-06-18.
• 99.83% uptime over 30 days.
• No breaking contract changes in 30 days.

Largest tool definitions

• oj_fetch_problem ~348 tokens
• oj_search_problems ~197 tokens
• oj_health ~75 tokens
• oj_capabilities ~74 tokens

Static checks of the advertised tools/list (schema, descriptions, annotations, tool-poisoning patterns, names, size) plus observed protocol, uptime, latency and contract changes. Read-only: no tool is ever called. Weights: schema 15, docs 20, safety 15, efficiency 15, compatibility 15, protocol 5, reliability 10, stability 5. Token counts are estimates (~3.6 characters per token).

Operator? Fix these, then re-check live. Embed the readiness badge:

[![MCP agent-readiness](https://glimind.com/v1/readiness/badge/mcp-registry%2Fio.github.ketherworks%2Fatcoder.svg)](https://glimind.com/server/mcp-registry%2Fio.github.ketherworks%2Fatcoder?ref=badge)

<a href="https://glimind.com/server/mcp-registry%2Fio.github.ketherworks%2Fatcoder?ref=badge"><img src="https://glimind.com/v1/readiness/badge/mcp-registry%2Fio.github.ketherworks%2Fatcoder.svg" alt="MCP agent-readiness"></a>

.. image:: https://glimind.com/v1/readiness/badge/mcp-registry%2Fio.github.ketherworks%2Fatcoder.svg
   :target: https://glimind.com/server/mcp-registry%2Fio.github.ketherworks%2Fatcoder?ref=badge
   :alt: MCP agent-readiness

Tool-definition log

Glimind records every version of this server's tool definitions in a signed, append-only transparency log. Current manifest sha256:70d1bb29df177c31…, first seen 2026-10-17, included at leaf 10347 of 39,978. Version history · verify what your client received.

Tools (4)

• oj_capabilities
• oj_fetch_problem
• oj_health
• oj_search_problems

Compare: most reliable other servers · most reliable retrieval servers · most reliable search servers

claude mcp add --transport http glimind https://glimind.com/mcp

{
  "mcpServers": {
    "glimind": {
      "type": "http",
      "url": "https://glimind.com/mcp"
    }
  }
}

FAQ

Is the Ketherworks Atcoder MCP server down right now?

As of 2026-10-21 14:17 UTC, the Ketherworks Atcoder MCP server is up with a Glimind reliability score of 85/100 (grade B). Over the last 30 days it answered 99.8% of Glimind's liveness checks. It had 4 outages in 90 days, with a median recovery of 56 minutes.

How many tools does Ketherworks Atcoder MCP server provide?

Ketherworks Atcoder MCP server advertises 4 tools, including oj_capabilities, oj_fetch_problem, oj_health, oj_search_problems.

How do I install Ketherworks Atcoder MCP server?

Point your MCP client at this streamable-http endpoint: https://api.ksrnyx.top/oj-mcp/atcoder/mcp

Is the Ketherworks Atcoder MCP server safe to connect to an AI agent?

Glimind scanned all 4 tool definitions for tool-poisoning patterns — hidden or invisible characters, instructions that override the model, concealment from the user, requests to read credential or MCP config files, conversation exfiltration and cross-tool shadowing — and found none. This checks what the server tells the model, not what its code does; review the source before granting access to sensitive data.

Operator of Ketherworks Atcoder MCP server?

Status page: 90-day uptime, every outage and how long it lasted.

Claim this listing to get the Verified operator marker, a remediation checklist and owner analytics, or embed the live badge from any of the tool pages above. Maintainers: alerts, deploy attestation and monthly reports.

Status is an automated estimate from Glimind's liveness checks (handshake and tool listing only; no tool is ever called) and may lag or differ from your network. Glimind is not affiliated with this server or its operator. Operator? Request a correction or opt out at https://glimind.com/opt-out.