horizOn MCP Server

by projectmakersde Your server? Claim it

local only

horizOn runs on your own machine — the client starts it, so there is no endpoint to ping. 108 installs a week from npm. Last commit 23 Oct 2026.

Docs, live API tools and prompts for the horizOn game backend in Godot, Unity and Unreal.

Installs per day peak 557 · avg 44 · +458% w/w

a month agotoday

108

Installs / week

npm · horizon-mcp

Stars

0 open issues

23 Oct 2026

Last commit

11 releases in 90 days

MIT

License

TypeScript

Nothing serious here today

Today is the operative word: we check horizOn every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add horizon-mcp -- npx -y horizon-mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "horizon-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "horizon-mcp"
      ]
    }
  }
}

~/.codex/config.toml

[mcp_servers.horizon-mcp]
command = "npx"
args = ["-y", "horizon-mcp"]

.cursor/mcp.json

{
  "mcpServers": {
    "horizon-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "horizon-mcp"
      ]
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "horizon-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "horizon-mcp"
      ]
    }
  }
}

Optional settings from the registry entry, left out of the block above: HORIZON_API_KEY (horizOn project API key for the live API tools. The documentation works without it), HORIZON_ACCOUNT_API_KEY (horizOn account key for the dashboard admin tools), HORIZON_BASE_URL (API base URL).

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horizOn — questions

Answers built from our own checks of this server.

Why is there no uptime for horizOn?

horizOn runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone. What can be measured is adoption: the npm package horizon-mcp was installed 108 times last week.

How do I connect horizOn?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It runs locally, so the command pulls horizon-mcp straight from npm; nothing to host, nothing to sign up for.

How many people use horizOn?

The npm package horizon-mcp was installed 108 times in the last week. Week over week that is +458%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.

Is horizOn 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.