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Tool builder

Create, test, and manage the HTTP and code tools your agents use — plus toolsets and the secrets they reference.

What it does with Protobox

Connect Tool builder once and its 0 tools become available to every agent talking to your MCP server: no separate integration code per client.

Works with

Claude, Cursor, ChatGPT, and any MCP-compatible client

Tool builder MCP for Claude, Cursor and ChatGPT · Protobox