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castos_list_private_subscribers — Castos MCP by usefulapi MCP Tool

castos_list_private_subscribers (castos list private subscribers) is one of 14 tools on the Castos MCP by usefulapi MCP server. Connect the server and your client discovers it on the handshake.

by client

How to call castos_list_private_subscribers from your client

Fastest route

claude mcp add --transport http castos https://castos.usefulapi.io/mcp

Other tools on this server

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.