urdb-mcp
MCP server for URDB. Gives your AI assistant 76 electronics, hardware and firmware calculators — plus the product integrity database tracking downgrades, shrinkflation, warranty cuts and enshittification.
Ask "what UBRR do I need for 9600 baud on a 16 MHz AVR?" and get 103 with the error percentage and the worked derivation, instead of a plausible-sounding guess.
Setup
1. Get an API key at urdb.io/settings/api-keys (free tier available)
2. Add to your MCP host
Claude Desktop config lives at ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows).
{
"mcpServers": {
"urdb": {
"command": "npx",
"args": ["urdb-mcp"],
"env": {
"URDB_API_KEY": "urdb_live_your_key_here"
}
}
}
}3. Restart your host
Calculators are metered separately from product data — 1,000 calculator calls a day on the free tier, so an agent working through a design won't exhaust your quota on arithmetic.






