Anything AI.
On your Mac.

Everything Ollama does, free. Then it does the rest of your Mac.

ModelPiper is a suite of local-first AI apps for macOS. ToolPiper, the core app, downloads models, runs them on the native llama.cpp engine, and serves a local OpenAI-compatible API — no account, no caps, no cloud. Then add voice, vision, automation, and 300+ MCP tools on top.

Download ToolPiper Open Web App

Free · Apple Silicon · macOS 26+

Always Free

The Pipeline Builder

A visual canvas for building AI workflows. Drag, connect, and run — right in your browser.

ModelPiper pipeline builder showing a 4-block workflow with Text, RAG, and AI Provider blocks alongside the My Connections panel listing local models loaded in ToolPiper.

Block-Based

Snap together prompt, model, response, and vision blocks to create multi-step AI pipelines.

Any Model

Works with Ollama, OpenAI, Anthropic, Groq, and any OpenAI-compatible endpoint.

Browser-Based

No installation needed. Open the web app and start building immediately.

Free Beta

ToolPiper for macOS

The local AI engine for your Mac. One click to download models, run them on the embedded llama.cpp engine, and read unified logs — free, no account.

ToolPiper Menu Bar Screenshot

Curated Model Library

Browse and install models with one click. LLMs, vision models, and TTS engines — all pre-configured.

Bundled Inference

llama.cpp, Apple Intelligence, speech-to-text, and text-to-speech — all running on your hardware.

Unified Logs

Every HTTP request, response, and error from all backends in one searchable stream.

Zero Config

Download a model, launch, and go. ToolPiper handles inference, model management, and server lifecycle.

Download for macOS

Requires macOS 26 or later

Coming Soon

VisionPiper

Real-time camera and screen analysis powered by local vision models.

Live camera feed analysis with local vision models
Screen capture and OCR pipelines
Custom vision workflows with the pipeline builder
Runs entirely on-device — no cloud uploads

VisionPiper Screenshot

From the Blog

Technical writing on local AI, MCP servers, on-device inference, and AX-native browser testing.

Accessibility-Native Testing: Why the AX Tree Is the Right Abstraction for Selectors

The technical case for testing against Chrome's real accessibility tree instead of the DOM.

AX-Native Browser Automation: Why We Built Our Own CDP Engine

A custom Chrome DevTools Protocol engine that queries the AX tree directly. Self-healing in 5 to 15 ms.

Give Claude 300+ macOS Superpowers with One MCP Server

ToolPiper exposes over 300 local tools to any MCP-compatible AI agent. One stdio binary, no cloud.

Apple Intelligence vs Open Models on Mac

When the Foundation Models Framework wins and when llama.cpp wins. Routing strategy that uses both.

The AI Agent Feedback Loop Is Broken. Here's the Fix.

Why terminal output is write-only memory for AI coding agents, and what a queryable log store changes.

Local AI Agents on Mac: Build and Run Without the Cloud

A tour of the local-first agent stack: inference, tools, memory, and orchestration on Apple Silicon.

Run an MCP Server Locally on Mac

Setup guide for stdio and HTTP transports, with Claude Code, Cursor, and Windsurf integration.

Run a Local OpenAI-Compatible API on Mac

A drop-in replacement for the OpenAI API that runs entirely on your machine.

View all 89 posts →

How It Works

Three steps to your first AI pipeline.

Install ToolPiper

Download the macOS menu bar app. Pick a model and it downloads — ready to run on your hardware.

Open the Web App

Launch the pipeline builder in your browser. Add blocks, pick a model, and wire them together.

Run Your Pipeline

Hit run. Your prompts flow through connected models — streaming responses in real time.

Your Data Stays on Your Mac

ModelPiper runs entirely on your machine. Your prompts, responses, and workflows never leave your device — unless you choose a cloud provider.

Explore plans

Free for everyone. Pro for the full toolkit. Team for your whole office on one Mac. Studio and Max coming soon.

Free

Everything Ollama does, free. No account, no caps.

Native llama.cpp engine — run any GGUF model
Unlimited model downloads, multi-model switching
Local OpenAI-compatible API + embeddings
MCP server with all 300+ tools
Transcription (STT) and chat with bundled model
Visual pipeline builder
Connect your own API keys (OpenAI, Anthropic, Groq)
Free companion apps (VisionPiper, AudioPiper, MediaPiper)

Pro

What no model runner does, at any price.

$10/mo

Everything in Free
Push-to-talk dictation, anywhere on your Mac
Text-to-speech — three engines, eight voices
Apple Intelligence on the Neural Engine
Local RAG over your files
All 9 inference backends

Coming soon

Studio

For content creators and marketers.

$29/mo

Everything in Pro
Image upscaling (ANE-native)
Video upscaling (60fps real-time)
Video editing pipeline
Pose detection (60fps streaming)
Outreach toolkit (queue, posting, Firehose)