Claude Desktop Cronus UI list_blocks
How to: Claude Desktop Cronus UI list_blocks
Add Cronus UI to Claude Desktop
-
01
Open ~/Library/Application Support/Claude/claude_desktop_config.json and merge this in. Keep any servers already there.
{
"mcpServers": {
"cronus-ui": {
"command": "npx",
"args": [
"-y",
"mcp-remote",
"https://aicronus.com/mcp"
]
}
}
}-
02
Save the file and restart Claude Desktop.
-
03
Ask for something list_blocks does. Claude Desktop lists the server's tools on connect and calls list_blocks itself — you do not invoke it by name.
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04
If nothing happens, check the server is running and that Cronus UI's identifier in your config matches the one above exactly.
Claude Desktop has no remote transport in its config file, so this bridges through mcp-remote. Restart the app after saving. Claude Desktop docs
Set these first
Cronus UI will not start until these are set, so list_blocks never becomes available.
-
CRONUS_UI_REGISTRY -
CRONUS_MCP_CLI_CMD -
CRONUS_MCP_CLI_TIMEOUT_MS
Same tool, other clients
This list was read from the server itself, by connecting to it and calling tools/list on 24 September 2026. It is what
the server actually exposes, not what its listing claims.
Mutating and Read-only are read off each tool's name, not its schema — a hint, not a guarantee. The registry stores tool names only; connect the server for its live schemas.