vcv-rack-mcp
Click on "Install Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type
@followed by the MCP server name and your instructions, e.g., "@vcv-rack-mcpcreate a simple synth patch with an oscillator and envelope"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
vcv-rack-mcp
MCP server for VCV Rack 2 built around one insight: .vcv patch files are plain JSON, so an LLM can compose modular synth patches by emitting structured data — no GUI automation, ever.
Status: v0.1.0 — core implementation complete. Patch generation, catalog, validation, OSC bridge, and agentic workflow all working. Manual gates P2 (round-trip in Rack) and P3 (OSC e2e) still need a human with Rack open.
Quick Start
git clone https://github.com/sandraschi/vcv-rack-mcp
cd vcv-rack-mcp
uv sync
uv run -m vcv_rack_mcpRelated MCP server: MCP Synth Controller
Tools
Tool | What it does |
| Create, edit, validate, list, get, open_in_rack, rack_cycle, import patches |
| Search catalog, get module details, verify installed, library link, sideload, suggest rack |
| OSC address map, performance sheet for live tweaking |
| ctx.sample loop: brief → generate → validate → retry (max 3) |
| Prefab UI cards |
Architecture
vcv-rack-mcp (port 10916, stdio / HTTP /mcp)
├── catalog/modules.yaml — 49 modules, 50/50 generative/performance
├── depot/ — .vcv patches + SQLite metadata + sidecar .md
└──→ osc-mcp (port 10767) — vcv_manager consumes address mapsWhat's Real vs What Needs Human
Feature | Status | Gate |
Catalog (49 modules) | Done, validated | P1 |
Patch generation | Done, deterministic | P2 (needs Rack round-trip) |
Validation (3 checks) | Done with tests | P2 |
OSC address map | Done | P3 (needs osc-mcp e2e) |
Agentic workflow | Done | P4 |
Webapp | Scaffolded (TODO Phase 5) | P5 |
Tauri wrapper | Future | P5 |
Ports
Backend: 10916 (FastMCP + FastAPI)
Frontend: 10917 (Vite React, planned)
OSC control: delegates to osc-mcp port 10767
This server cannot be installed
Maintenance
Latest Blog Posts
- Your AI Chatbot Just Exposed Your CEO's Salary to an InternBy Om-Shree-0709 on .Agent IdentityMCP SecurityOAuth Delegation
- Why MCP Servers Need Execution Sandboxing (And Why Your Current Stack Isn't Enough)By Om-Shree-0709 on .Agentic AiPrompt InjectionWebAssembly
MCP directory API
We provide all the information about MCP servers via our MCP API.
curl -X GET 'https://glama.ai/api/mcp/v1/servers/sandraschi/vcv-rack-mcp'
If you have feedback or need assistance with the MCP directory API, please join our Discord server