MCJars

com.mcjars/minecraftmcjars.comstreamable-httpv1.0.0Scanned 1 hour ago

Free Minecraft server builds, versions, downloads and configurations for AI assistants.

3 tools: 3 only read.

Reads private data · 0
Reads text others write · 3
Can send data out · 0
3 findings

Anlyon alternative

Run the operations that matter as governed actions.

Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.

Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.

Import an OpenAPI spec →

Tools

Grouped by what each tool does, most consequential first. Open one for its reasons and full description; descriptions are the publisher's own words.

3 tools

Only reads 3Looks things up and changes nothing.Show 3 read-only tools

get_downloadGet an exact provider build or the newest matching build when version is omitted.Reads text others write1 finding
Why it is in this group
- The name "get_download" says "get": a word for reading.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Findings
- Info
  The input schema at properties.context.description mentions "credentials".
  Matched text
  inputSchema.properties.context.description: "...es, emails, phone numbers, IPs, IDs, or credentials. You MUST generalize specific entities..."
  What this check looks for
Description, as the server wrote it
Get an exact provider build or the newest matching build when version is omitted. Minecraft and loader versions are separate: use minecraftVersion for the game, version for the full provider build. Returns URLs only; does not download or execute files. No match returns an error without substituting another game version or channel.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
list_providersList available Minecraft server software and proxy providers with their slugs, descriptions, and latest-version summaries.Reads text others write1 finding
Why it is in this group
- The name "list_providers" says "list": a word for reading.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Findings
- Info
  The input schema at properties.context.description mentions "credentials".
  Matched text
  inputSchema.properties.context.description: "...es, emails, phone numbers, IPs, IDs, or credentials. You MUST generalize specific entities..."
  What this check looks for
Description, as the server wrote it
List available Minecraft server software and proxy providers with their slugs, descriptions, and latest-version summaries.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
list_versionsBrowse provider builds in catalog order (newest first).Reads text others write1 finding
Why it is in this group
- The name "list_versions" says "list": a word for reading.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
- untrusted-inputThe description's first sentence says "browse": it reads web pages, which anyone can write.
Findings
- Info
  The input schema at properties.context.description mentions "credentials".
  Matched text
  inputSchema.properties.context.description: "...es, emails, phone numbers, IPs, IDs, or credentials. You MUST generalize specific entities..."
  What this check looks for
Description, as the server wrote it
Browse provider builds in catalog order (newest first). Filter by Minecraft version and channel. Each result groups all operating-system downloads for one build. Stable builds only unless requested otherwise.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Exfil surface

Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.

No private-data, untrusted-input, outbound path in this server alone: no tool is tagged private-data or outbound.

Reads private data0: Reads files, mail, messages, databases, secrets, calendars or repositories.
Reads text others write3: Brings in text someone else can write: web pages, inbound email, messages, issues and comments.; get_download
list_providers
list_versions
Can send data out0: Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.

Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.

Findings

Matches of fixed checks, with the text they matched.

3 info

Infolist_providers
The input schema at properties.context.description mentions "credentials".
Matched text
inputSchema.properties.context.description: "...es, emails, phone numbers, IPs, IDs, or credentials. You MUST generalize specific entities..."
What this check looks for
Infolist_versions
The input schema at properties.context.description mentions "credentials".
Matched text
inputSchema.properties.context.description: "...es, emails, phone numbers, IPs, IDs, or credentials. You MUST generalize specific entities..."
What this check looks for
Infoget_download
The input schema at properties.context.description mentions "credentials".
Matched text
inputSchema.properties.context.description: "...es, emails, phone numbers, IPs, IDs, or credentials. You MUST generalize specific entities..."
What this check looks for

History

Changes to its tool definitions and to its remote endpoint, newest first.

No change seen yet. Its tools are rescanned every day, and a remote endpoint is looked at once a week.

All changes to this server

Install

Pinned to version 1.0.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http minecraft https://mcjars.com/mcp

claude mcp add --transport http minecraft https://mcjars.com/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json

{
  "permissions": {
    "allow": [
      "mcp__minecraft__list_providers",
      "mcp__minecraft__list_versions",
      "mcp__minecraft__get_download"
    ],
    "ask": [],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as minecraft. Review it before you use it.

Capability tags behind 3 rules

mcp__minecraft__list_providers untrusted-input
mcp__minecraft__list_versions untrusted-input
mcp__minecraft__get_download untrusted-input

Keep the decision: fail CI when the tools change, follow every change, or show a badge.

Pin in CI

Fail a build when the tools you reviewed are not the tools the server serves today.

curl -s "https://anlyon.dev/api/v1/servers/com.mcjars/minecraft/verify?hash=bd375872634f87a598f25595cf6113fff127a8e4e71f52dca7d71b603fbaebcf" | jq -e '.changed == false'

Pinned hash bd375872634f, from Oct 29, 2026, 13:17 UTC.

Watch

Get told when its tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/com.mcjars/minecraft/changes.xml

An Atom feed. Works in any feed reader or Slack's RSS app.

Badge

[![anlyon.dev](https://anlyon.dev/badge/com.mcjars/minecraft.svg)](https://anlyon.dev/servers/com.mcjars/minecraft)

Source: MCP Registry. Synced Oct 29, 2026, 13:17 UTC.