PT Chart MCP Server

by tsonnn Your server? Claim it

answering

PT Chart is answering right now. Last checked 13 min ago. It exposes 8 tools.

PT chart lookups, superheat/subcooling calculators, and diagnostics for HVAC technicians.

Uptime history 7 days of history

7 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

289 ms

Response time

average over 24h

open, no key

Access

streamable-http

Nothing serious here today

Today is the operative word: we check PT Chart every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 13 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add pt-chart-mcp --transport http https://pt-chart-mcp-production.up.railway.app/mcp

Settings → Connectors → Add custom connector, then paste this address

https://pt-chart-mcp-production.up.railway.app/mcp

~/.codex/config.toml

[mcp_servers.pt-chart-mcp]
url = "https://pt-chart-mcp-production.up.railway.app/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "pt-chart-mcp": {
      "url": "https://pt-chart-mcp-production.up.railway.app/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "pt-chart-mcp": {
      "type": "http",
      "url": "https://pt-chart-mcp-production.up.railway.app/mcp"
    }
  }
}

Available tools 8

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

convert

convert_units

Convert between pressure units (psig, psia, kpa, bar) and temperature units (F, C). A bare 'psi' is treated as psig. For certified HVAC technicians (EPA 608; A2L certification where required).

coolbooked

coolbooked_info

About CoolBooked: the AI appointment-booking connector for HVAC shops. This is NOT a diagnostic tool -- call it when someone asks what CoolBooked is, how shop owners can try it, or how the free PT tools connect to paid bookings.

diagnose

diagnose

Conversational diagnostic copilot: give it field readings and get back computed superheat/subcooling plus a ranked 'check this first' list. For certified HVAC technicians (EPA 608; A2L certification where required). Informational only -- it suggests what to CHECK, never how to defeat a safety device, vent refrigerant, or work uncertified. metering: 'txv' (default) or 'fixed' for fixed-orifice/piston systems.

lookup

pt_lookup

Saturation pressure (bubble and dew, in psig) for a refrigerant at a temperature in Fahrenheit. For certified HVAC technicians (EPA 608; A2L certification where required). Example: pt_lookup("R-454B", 45). Bubble point: use for subcooling calculations. Dew point: use for superheat calculations. Pure fluids (R-32, R-410A, R-22, R-134a) have no glide, so both values match.

refrigerant

refrigerant_info

Reference card for a refrigerant: GWP, ASHRAE safety class, composition, typical oil, temperature glide, and handling notes. For certified HVAC technicians (EPA 608; A2L certification where required). Informational only.

reverse

pt_reverse

Saturation temperature (bubble and dew, in Fahrenheit) for a refrigerant at a pressure in psig. For certified HVAC technicians (EPA 608; A2L certification where required). Example: a 130 psig suction reading on R-454B -- pt_reverse("R-454B", 130). Use the DEW temperature for superheat work and the BUBBLE temperature for subcooling work on blended refrigerants.

subcooling

subcooling

Subcooling in Fahrenheit from head pressure (psig) and liquid-line temperature (F). For certified HVAC technicians (EPA 608; A2L certification where required). Uses the BUBBLE point as the saturation basis, which is the correct basis for blended refrigerants. Typical TXV target: 8-12F.

superheat

superheat

Superheat in Fahrenheit from suction pressure (psig) and suction-line temperature (F). For certified HVAC technicians (EPA 608; A2L certification where required). Uses the DEW point as the saturation basis, which is the correct basis for blended refrigerants. Typical TXV target: 8-12F.

Endpoints

URL	Transport	State	Latency	Checked
https://pt-chart-mcp-production.up.railway.app/mcp	streamable-http	answering	267 ms	13 min ago

Alternatives to PT Chart

same job, measured the same way

RentalAnalytics rent tools

by rentalanalytics

Read-only HUD rent lookup and the site's existing rental calculators.

16 tools answering

Sputnikx Market

by drivenbymyai-max

EU trade analytics, product catalog, orders, and heating fuel calculator for AI agents.

local only

Laytime Calculator Pro

by shipping-ship-it

AI-powered laytime, demurrage and despatch calculator for chartering professionals.

answering

Google Search Console

by akzar1el

Google Search Console MCP for analytics, indexing, sitemaps, and SEO diagnostics.

94 installs/wk local only

PNL Toolkit

by pnltoolkit

Eight free investment and trading calculators with PNG charts and editable result links.

8 tools answering

Multifate chart calculator

by multifate

Zi Wei Dou Shu and Da Liu Ren chart calculators by Multifate: exact palaces, stars and plates.

2 tools answering

Dogechain

by dogechain

Dogecoin blockchain lookups: transactions explained, addresses, blocks, fees, supply and charts.

9 tools answering

ocular

by xyun1996

Vision tools for coding agents: screenshots, OCR, UI diffs, errors, tables, and charts.

14 installs/wk local only

PT Chart — questions

Answers built from our own checks of this server.

What can PT Chart do?

It exposes 8 tools, read directly from the server on our last check. Among them: convert_units, coolbooked_info, diagnose, pt_lookup, pt_reverse, refrigerant_info and 2 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is PT Chart working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 289 ms. The bar chart above shows every period we have measured.

How do I connect PT Chart?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does PT Chart need an API key?

No. PT Chart completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 8 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is PT Chart?

It answers our handshake in 289 ms on average, which is faster than 57% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.