Cursor Rack Rates cheapest_for_spec
How to: Cursor Rack Rates cheapest_for_spec
Add Rack Rates to Cursor
-
01
Open ~/.cursor/mcp.json and merge this in. Keep any servers already there.
{
"mcpServers": {
"ledger": {
"url": "https://rackrates.dev/mcp"
}
}
}-
02
Save the file and restart Cursor.
-
03
Ask for something cheapest_for_spec does. Cursor lists the server's tools on connect and calls cheapest_for_spec itself — you do not invoke it by name.
-
04
If nothing happens, check the server is running and that Rack Rates's identifier in your config matches the one above exactly.
Use .cursor/mcp.json in a project root instead to scope it to that project. Cursor merges both. Cursor docs
Same tool, other clients
This list was read from the server itself, by connecting to it and calling tools/list on 5 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.