calc.engineer MCP Server

88 engineering calculators via Model Context Protocol

This is an MCP endpoint for AI agents — not a web page. Connect your MCP client to use it.

Claude Code

claude mcp add calc-engineer --transport http https://calc.engineer/mcp

Cursor / Windsurf / VS Code

Add to your MCP config (.cursor/mcp.json, etc.):

{
  "mcpServers": {
    "calc-engineer": {
      "url": "https://calc.engineer/mcp"
    }
  }
}

Claude Desktop

Claude Desktop doesn't support remote URLs directly. Use the mcp-remote bridge:

{
  "mcpServers": {
    "calc-engineer": {
      "command": "npx",
      "args": ["mcp-remote", "https://calc.engineer/mcp"]
    }
  }
}

Requires Node.js installed. Config file: ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows).

REST API

Not using MCP? Get a free API key and use the REST API directly:

# Get a free API key (no signup, 5,000 calls/day)
curl -X POST https://calc.engineer/api/keys

# Use it
curl -X POST https://calc.engineer/api/link_budget \
  -H "Content-Type: application/json" \
  -H "X-Api-Key: YOUR_KEY" \
  -d '{"freq_mhz": 915, "tx_dbm": 20,
       "dist_km": 5, "tx_gain_dbi": 6,
       "rx_gain_dbi": 3}'