horizOn
Docs, live API tools and prompts for the horizOn game backend in Godot, Unity and Unreal.
MCP server · by ProjectMakersDE
About
horizOn is an MCP server published by ProjectMakersDE. Marketplaces we read that list it: 1 (Official MCP Registry). We first saw it on 2026-10-11 and have recorded no change since. As of our marketplace pass on 2026-10-13.
What it asks for
- Runs on your machine
- Secrets: 2
- Settings: 3
Requires: HORIZON_ACCOUNT_API_KEY (secret), HORIZON_API_KEY (secret)
What it declares, asks for and runs, in full
Only install plugins from developers you trust. We list what marketplaces publish and do not test plugins.
Works with
- Claude Code
- Codex
- Cursor
- VS Code
- Copilot CLI
From the marketplaces that list it and the MCP transport it declares, as each client documents them. We do not test plugins.
Connect
Commands and configs built only from what its marketplaces declare. We do not run them for you and do not test plugins.
As a local MCP server: npm package
Built from what Official MCP Registry declares.
claude mcp add --env "HORIZON_ACCOUNT_API_KEY=<YOUR_HORIZON_ACCOUNT_API_KEY>" --env "HORIZON_API_KEY=<YOUR_HORIZON_API_KEY>" --transport stdio horizon-mcp -- npx -y horizon-mcp[mcp_servers.horizon-mcp]
command = "npx"
args = ["-y", "horizon-mcp"]
[mcp_servers.horizon-mcp.env]
HORIZON_ACCOUNT_API_KEY = "<YOUR_HORIZON_ACCOUNT_API_KEY>"
HORIZON_API_KEY = "<YOUR_HORIZON_API_KEY>"{
"mcpServers": {
"horizon-mcp": {
"command": "npx",
"args": [
"-y",
"horizon-mcp"
],
"env": {
"HORIZON_ACCOUNT_API_KEY": "<YOUR_HORIZON_ACCOUNT_API_KEY>",
"HORIZON_API_KEY": "<YOUR_HORIZON_API_KEY>"
}
}
}
}Replace the values in angle brackets with your own. We show the names of the settings, never values.
Optional settings it also lists: HORIZON_BASE_URL.
Where it is published
| Marketplace | Status | Version | Figures | Verified | First seen |
|---|---|---|---|---|---|
| Official MCP Registry (Open the registry record) | Listed | 1.8.1 | Forks (GitHub): 0 Stars (GitHub): 0 |
Not marked |
Each figure is the marketplace's own and is never added up across marketplaces. A marketplace that publishes no figure shows none: no number is not zero.
What changed
Nothing has moved on this plugin since we started watching it.
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Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.