Embedcalc MCP server

embedcalc-mcp

Exact embedded-engineering math for AI agents. An MCP server with 38 deterministic calculators, code generators, and schematic checks — so Claude, Cursor, or any MCP-enabled agent computes CRC check values, CAN timing registers, and struct padding, and reviews schematics for MCU wiring mistakes, instead of hallucinating them.

Why

LLMs are confidently wrong about exactly the math that bricks boards. Ask any model for a CRC-16/MODBUS check value, an STM32 CANBTR register for 500 kbit/s @ 36 MHz, or the padded size of a struct — you'll get a plausible-looking wrong answer often enough that you can't trust any of them. The failure mode is the worst kind: the answer looks* right.

This server gives the model tools instead. Every tool is a pure, deterministic implementation pinned with test vectors (standard CRC check values, oracle fixtures, IPC/ASTM published numbers — 174 tests).

Install

Claude Code:

claude mcp add embedcalc -- npx -y embedcalc-mcp

Claude Desktop / Cursor / any MCP client (JSON config):

{
  "mcpServers": {
    "embedcalc": { "command": "npx", "args": ["-y", "embedcalc-mcp"] }
  }
}

No API key, no account. Runs locally over stdio. (The optional find_component tool queries embedcalc.com over the network; everything else is offline.)

Tools (38)

All tool names are prefixed embedcalc (e.g. embedcalccrctoc).

Example prompts

Shortened. The full README is on GitHub.