Coolprop MCP server

@pipeworx/coolprop

Thermophysical properties of a pure fluid, computed from two independent state variables (PropsSI-style: give e.g. temperature + pressure, get density, enthalpy, entropy, viscosity, thermal conductivity, specific heat, vapor quality, phase). Covers ~124 fluids — water, common refrigerants, hydrocarbons, cryogens, siloxanes and more — computed in-process by CoolProp rather than looked up from a table, so a query is valid anywhere inside each fluid's full equation-of-state range, not just at tabulated points.

Part of Pipeworx — an MCP gateway connecting AI agents to 1854+ live data sources. This is an independent, unofficial integration — not affiliated with, endorsed by, or published by the upstream provider.

Tools

— two independent state variables (T, P, D, H, S, U, or Q, SI units) in, up to 12 requested properties out: T, P, D (density, kg/m3), H (enthalpy, J/kg), S (entropy, J/kg/K), U (internal energy, J/kg), Q (vapor quality), CPMASS/CVMASS (specific heats, J/kg/K), VISCOSITY (Pa·s), CONDUCTIVITY (W/m/K), PRANDTL, M (molar mass, kg/mol), Phase (liquid/gas/supercritical/twophase/...).

• coolpropfluidproperties(fluid, input1name, input1value, input2name, input2value, outputs)

recognizes. No aliases: use "CarbonDioxide", not "CO2" — this tool is how you find the exact spelling rather than guessing one.

• coolproplistfluids() — the exact ~124 canonical fluid names this build

Auth

Keyless.

Data sources

thermophysical property library (MIT licence). Every call computes the property in-process from CoolProp's own equations of state; nothing is looked up from a pre-built table of values, and nothing is fetched from a live upstream.

• CoolProp (Ian H. Bell and the CoolProp developers) — an open-source

Notes

"CarbonDioxide", "Nitrogen", "R134a") — common short forms like "CO2" are not recognized and return a clear error rather than a wrong answer. Call coolproplistfluids to get the exact name.

• No aliases. This build's fluid list carries only canonical names (e.g.

variables.** Asking for T twice (or any other repeated/dependent pair) returns a named error rather than a nonsense number.

• input1name and input2_name must be two different, independent state

wrong value.** CoolProp's own low-level convention for an unresolvable state is the IEEE Infinity sentinel (not an exception) — this pack detects that and reports it as an error naming the fluid, inputs and valid input codes, rather than ever returning Infinity as though it were a real density or enthalpy.

• **A state CoolProp cannot resolve returns a named error, not a silent

the state is physically unremarkable (observed live for pure CarbonDioxide across a range of atmospheric-pressure temperatures) — this reads as the same named error as an out-of-range state, since there is no way to distinguish a genuine CoolProp solver gap from an invalid input at the property-call level. If a fluid you expect to work returns this error, try a different input pair (e.g. density + temperature instead of pressure + temperature) before concluding the state is invalid.

• A small number of (fluid, state) combinations fail to resolve even when

version).

• Mass-basis properties only (no molar-basis inputs/outputs in this

Quick Start

Add to your MCP client (Claude Desktop, Cursor, Windsurf, etc.):

{
  "mcpServers": {
    "coolprop": {
      "url": "https://gateway.pipeworx.io/coolprop/mcp"
    }
  }
}

What this endpoint actually serves

Shortened. The full README is on GitHub.