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One install. Only the tools you need.

ToolPiper is a local MCP server for macOS with 104 tools across 9 categories. Load all of them, or filter to just the ones you need — saving up to 90% of context window overhead.

Get started

Two steps. Under 60 seconds.

1

Download ToolPiper

Free on the Mac App Store. modelpiper.com/toolpiper →

2

Connect to your AI client

Claude Code

claude mcp add toolpiper -- ~/.toolpiper/mcp

Cursor / Windsurf / Gemini Code — add to .mcp.json

{
  "mcpServers": {
    "toolpiper": {
      "type": "stdio",
      "command": "~/.toolpiper/mcp"
    }
  }
}

HTTP Transport — no CLI middleman

{
  "mcpServers": {
    "toolpiper": {
      "type": "http",
      "url": "http://localhost:9998/mcp"
    }
  }
}

Pick your categories

Every tool definition costs tokens in the AI's context window. 104 tools = ~2,000 tokens/message. Select only what you need.

Your install command~2257 tokens/msg
claude mcp add toolpiper -- ~/.toolpiper/mcp

ActionPiper unlocks 29 system tools

The system category (29 tools) routes through ActionPiper — a companion macOS app that controls audio, display, Bluetooth, windows, Finder, Dock, notifications, contacts, calendar, and more. ToolPiper dispatches commands to ActionPiper over a local socket — no extra configuration needed.

Without ActionPiper installed, the other 75 tools work normally. System tools return an install prompt instead of failing silently.

Download ActionPiper →

How it works

The MCP binary ships inside ToolPiper.app — nothing else to install.

AI Client (Claude Code, Cursor, Windsurf, Gemini Code, etc.)
    ↓ JSON-RPC (stdio or HTTP)
~/.toolpiper/mcp [--category | --profile]    OR    POST localhost:9998/mcp
    ↓
ToolPiper.app (macOS, running)
    ↓
Backends (llama.cpp, FluidAudio, MLX Audio, Apple Intelligence, Vision, NLP, Pose, CDP, ActionPiper)

Auth

The MCP binary reads ToolPiper's session key from disk on every request. Zero configuration.

Errors

If ToolPiper isn't running, every tool returns an install message pointing to modelpiper.com.

Annotations

Every tool has readOnlyHint and openWorldHint so AI clients make informed decisions.

Filtering

Pass --category or --profile to serve only the tools you need.

All tools 104

Grouped by category. Click to expand.

Ready?

claude mcp add toolpiper -- ~/.toolpiper/mcp
Full MCP documentation →