Cline Castle MCP by usefulapi castle_count_list_items
How to: Cline Castle MCP by usefulapi castle_count_list_items
Add Castle MCP by usefulapi to Cline
-
01
Open ~/Library/Application Support/Code/User/globalStorage/saoudrizwan.claude-dev/settings/cline_mcp_settings.json and merge this in. Keep any servers already there.
{
"mcpServers": {
"castle": {
"url": "https://castle.usefulapi.io/mcp"
}
}
}-
02
Save the file and restart Cline.
-
03
Ask for something castle_count_list_items does. Cline lists the server's tools on connect and calls castle_count_list_items itself — you do not invoke it by name.
-
04
If nothing happens, check the server is running and that Castle MCP by usefulapi's identifier in your config matches the one above exactly.
Cline's MCP Servers pane edits this file for you if you would rather not find it. Cline docs
Same tool, other clients
This list was read from the server itself, by connecting to it and calling tools/list on 14 November 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.