metrology-toolbox-mcp
Use the calculators from your AI
Connect Metrology Bench to the AI assistant you already use. When you ask it to convert a type K reading or size a crowfoot correction, it runs our exact calculation and tells you the equation and source it used. No sign-up, no account, no key.
Hosted · nothing to install
Works in the browser and on your phone. Add this URL as a custom connector in your AI app’s settings:
https://metrologybench.com/mcp
Requests are rate-limited so the service stays free. We log nothing about what you calculate.
Local · runs on your computer
For labs with strict IT rules: nothing leaves your machine. Needs Node.js. In Claude Desktop or another MCP client, add:
{
"mcpServers": {
"metrology-toolbox": {
"command": "npx",
"args": ["-y", "metrology-toolbox-mcp"]
}
}
}In Claude Code:
claude mcp add metrology-toolbox -- npx -y metrology-toolbox-mcp
Things to ask
- “My type K reads 12.209 mV with the reference at 0 °C. What temperature is that?”
- “A Pt100 reads 109.73 Ω. What’s the temperature, and what equation did you use?”
- “I need 65 ft·lbf at the bolt with an 18 inch wrench and a 2.5 inch crowfoot in line. What do I set?”
- “Convert 30 inH₂O to kPa and tell me which water density you assumed.”
Tools the server provides
| Tool | What it does |
|---|---|
| rtd_resistance_from_temperature | Pt100/Pt1000 resistance at a temperature |
| rtd_temperature_from_resistance | Temperature from RTD resistance |
| thermocouple_emf_from_temperature | Type K mV at a temperature |
| thermocouple_temperature_from_emf | Temperature from type K mV, with NIST’s error band |
| convert_pressure | 13 pressure units |
| convert_torque | 9 torque units |
| torque_extension_setting | Wrench setting with an inline extension |
| round_value | Decimal rounding, half up or half to even |
Every result includes its equation, source, version and the note that it is a calculated value, not a certified result. Inputs outside an equation’s valid range are refused rather than extrapolated, so your AI can’t quietly hand you a number the math doesn’t support.