Logic Analyzer

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AI-driven USB logic analyzer control via FastMCP. Captures digital traces, decodes UART/I2C/SPI, and exports VCD for PulseView, supporting sigrok hardware and b

by sandraschi

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About

AI-driven USB logic analyzer control via FastMCP. Captures digital traces, decodes UART/I2C/SPI, and exports VCD for PulseView, supporting sigrok hardware and built-in simulator.

README

MIT License Python 3.12+ FastMCP 3.2+

AI-driven USB logic analyzer control via FastMCP 3.2. Capture digital traces with sigrok or the built-in simulator, decode UART/I2C/SPI, and export VCD for PulseView.

How it runs

Mode	Hardware	When
Simulator (default)	None	Development, CI, agent dry-runs
sigrok	Hantek 6022BL (LA mode), DSLogic, FX2 clones	Production bench with sigrok-cli

The MCP server does not bundle sigrok. Install PulseView or sigrok-cli separately, then connect your USB LA.

Hands-in / Hands-out

Direction	Artifacts	Notes
Hands-in	`device_id`, channels, trigger	Via `la_device`, `la_configure`, `la_trigger`
Hands-out	Trace preview (downsampled JSON)	`la_capture(operation="single")`
Hands-out	CSV, VCD, JSON summary	`la_capture(operation="export_vcd")` in `LOGIC_ANALYZER_MCP_CAPTURE_DIR`
Hands-out	Protocol decode rows	`la_decode(operation="uart")`

Fleet pipelines

Partner MCP	Workflow
oscilloscope-mcp	Mixed-signal bring-up (analog + digital)
kicad-mcp	Verify SPI/I2C after PCB bring-up
chip-design-mcp	Debug FPGA/MCU buses

Quick Start

Set-Location D:\Dev\repos\logic-analyzer-mcp
uv sync --extra dev
just webapp
# Open http://127.0.0.1:10987

STDIO-only (Cursor MCP):

just serve

Dry-run without hardware:

la_device(operation="connect", device_id="sim-la-001")
la_capture(operation="single", sample_rate_hz=1000000, sample_count=4096)
la_decode(operation="uart", rx="D0")

Cursor MCP config

Add to C:\Users\sandr\.cursor\mcp.json:

"logic-analyzer-mcp": {
  "command": "C:/Users/sandr/.local/bin/uv.exe",
  "args": [
    "--directory",
    "D:/Dev/repos/logic-analyzer-mcp",
    "run",
    "python",
    "-m",
    "logic_analyzer_mcp",
    "--stdio"
  ],
  "env": {
    "FASTMCP_BANNER": "0",
    "FASTMCP_UPDATE_CHECK": "0",
    "PYTHONUNBUFFERED": "1",
    "LOGIC_ANALYZER_MCP_BACKEND": "auto"
  }
}

Restart Cursor after editing mcp.json.

Tools

Tool	Operations
`la_device`	list, connect, disconnect, status, capabilities, backends
`la_configure`	channels, sample_rate, get, simulator_pattern
`la_trigger`	set, get
`la_capture`	single, preview, export_csv, export_vcd, export_summary, last
`la_decode`	list, run, last, uart, i2c, spi
`la_help`	discover, tool_help, status, quickstart, faq, hardware_guide

Webapp

Port	Role
10985	Backend (FastAPI + MCP `/mcp`)
10987	Frontend (Vite React — trace + decode viewers)

just webapp

Documentation

INSTALL.md — setup paths
docs/ARCHITECTURE.md — system design
docs/TOOLS.md — portmanteau reference
docs/HARDWARE.md — LA buying guide
docs/BACKENDS.md — sigrok + simulator
llms.txt — agent discovery index

License

MIT — see LICENSE.

from github.com/sandraschi/logic-analyzer-mcp

Install Logic Analyzer in Claude Desktop, Claude Code & Cursor

Recommended · one command, every IDE

unyly install logic-analyzer-mcp

Installs into Claude Desktop, Claude Code, Cursor & VS Code — handles npx, uvx and build-from-source repos for you.

First time? Get the CLI: curl -fsSL https://unyly.org/install | sh

Or configure manually

Run in your terminal:

claude mcp add logic-analyzer-mcp -- uvx logic-analyzer-mcp

FAQ

Is Logic Analyzer MCP free?

Yes, Logic Analyzer MCP is free — one-click install via Unyly at no cost.

Does Logic Analyzer need an API key?

No, Logic Analyzer runs without API keys or environment variables.

Is Logic Analyzer hosted or self-hosted?

Self-hosted: the server runs locally on your machine via the install command above.

How do I install Logic Analyzer in Claude Desktop, Claude Code or Cursor?

Open Logic Analyzer on unyly.org, pick your client tab (Claude Desktop, Claude Code, Cursor) and press Install — the config is generated automatically, no JSON editing.

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