Install horizOn for Claude Desktop
Claude Desktop reads mcpServers from claude_desktop_config.json. Restart the app after saving.
- Open ~/Library/Application Support/Claude/claude_desktop_config.json on macOS, %APPDATA%\Claude\claude_desktop_config.json on Windows, or ~/.config/Claude/claude_desktop_config.json on Linux.
- Paste the JSON config below.
- Replace placeholder secrets, then restart the client if it does not reload on its own.
~/Library/Application Support/Claude/claude_desktop_config.json
{
"mcpServers": {
"projectmakersde-horizon-mcp": {
"command": "npx",
"args": [
"-y",
"horizon-mcp@1.8.1"
],
"env": {
"HORIZON_API_KEY": "YOUR_HORIZON_API_KEY",
"HORIZON_ACCOUNT_API_KEY": "YOUR_HORIZON_ACCOUNT_API_KEY",
"HORIZON_BASE_URL": "https://horizon.pm"
}
}
}
}