PT Chart

io.github.Tsonnn/pt-chart-mcpTsonnnstreamable-httpv1.0.0Scanned 22 hours ago

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

8 tools: 7 change things and 1 only read.

Reads private data · 0
Reads text others write · 0
Can send data out · 0
No findings

Tools listed without sign-in. Remote posture

Anlyon alternative

7 of these tools change something. Run those as governed actions.

Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.

Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.

Import an OpenAPI spec →

Tools

Grouped by what each tool does, most consequential first. Open one for its reasons and full description; descriptions are the publisher's own words.

8 tools

Changes things 7Creates or changes something that can be changed back.Claude Code: ask

convert_unitsConvert between pressure units (psig, psia, kpa, bar) and temperature units (F, C).No findings
Why it is in this group
- The name "convert_units" says "convert": a word for a change.
Description, as the server wrote it
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_infoAbout CoolBooked: the AI appointment-booking connector for HVAC shops.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it
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.
diagnoseConversational diagnostic copilot: give it field readings and get back computed superheat/subcooling plus a ranked 'check this first' list.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it
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.
pt_reverseSaturation temperature (bubble and dew, in Fahrenheit) for a refrigerant at a pressure in psig.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it
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.
refrigerant_infoReference card for a refrigerant: GWP, ASHRAE safety class, composition, typical oil, temperature glide, and handling notes.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it
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.
subcoolingSubcooling in Fahrenheit from head pressure (psig) and liquid-line temperature (F).No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it
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.
superheatSuperheat in Fahrenheit from suction pressure (psig) and suction-line temperature (F).No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
Description, as the server wrote it
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.

Only reads 1Looks things up and changes nothing.Show 1 read-only tool

pt_lookupSaturation pressure (bubble and dew, in psig) for a refrigerant at a temperature in Fahrenheit.No findings
Why it is in this group
- The name "pt_lookup" says "lookup": a word for reading.
Description, as the server wrote it
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.

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Exfil surface

Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.

No private-data, untrusted-input, outbound path in this server alone: no tool is tagged private-data or untrusted-input or outbound.

Reads private data0: Reads files, mail, messages, databases, secrets, calendars or repositories.
Reads text others write0: Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
Can send data out0: Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.

Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.

Remote posture

What anyone on the internet sees at the remote endpoint: an anonymous initialize and tools/list, and the public OAuth metadata.

Tools listed without sign-in

Looked at Oct 22, 2026, 14:55 UTC, unchanged since Oct 22, 2026. No credentials were sent and no tool was called. What is looked at.

Reachable: yes
HTTP status of an anonymous initialize: 200
tools/list served without credentials: yes
Tools that change things, listed without credentials: 7
Protocol version: 2025-06-18
WWW-Authenticate on 401: not observed
resource_metadata in WWW-Authenticate: not observed
RFC 9728 protected resource metadata: not observed
Authorization servers: not observed
Legacy HTTP+SSE transport: no
Dynamic client registration: not observed
Client ID metadata documents: not observed

WarnThe whole server
The endpoint served tools/list without credentials, and the list has 7 tools that change things (7 write). Whether a call also works without credentials was not tested: tools are never called.
Matched text
https://pt-chart-mcp-production.up.railway.app/mcp: tools/list returned 8 tools to an anonymous client, including pt_reverse (write), superheat (write), subcooling (write), convert_units (write), refrigerant_info (write) and 2 more
What this check looks for

Findings

Matches of fixed checks, with the text they matched.

No check matched anything in these tool definitions. That is not a safety guarantee.

History

Changes to its tool definitions and to its remote endpoint, newest first.

No change seen yet. Its tools are rescanned every day, and a remote endpoint is looked at once a week.

All changes to this server

Install

Pinned to version 1.0.0. Values in angle brackets are yours to fill in.

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

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

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json

{
  "permissions": {
    "allow": [
      "mcp__pt-chart__pt_lookup"
    ],
    "ask": [
      "mcp__pt-chart__pt_reverse",
      "mcp__pt-chart__superheat",
      "mcp__pt-chart__subcooling",
      "mcp__pt-chart__convert_units",
      "mcp__pt-chart__refrigerant_info",
      "mcp__pt-chart__diagnose",
      "mcp__pt-chart__coolbooked_info"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as pt-chart. Review it before you use it.

Keep the decision: fail CI when the tools change, follow every change, or show a badge.

Pin in CI

Fail a build when the tools you reviewed are not the tools the server serves today.

curl -s "https://anlyon.dev/api/v1/servers/io.github.Tsonnn/pt-chart-mcp/verify?hash=98d70a1b38705c5deb654cffb6e04c37c5e71e45460202f92ba9a90c4d99a634" | jq -e '.changed == false'

Pinned hash 98d70a1b3870, from Oct 21, 2026, 19:09 UTC.

Watch

Get told when its tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/io.github.Tsonnn/pt-chart-mcp/changes.xml

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Badge

[![anlyon.dev](https://anlyon.dev/badge/io.github.Tsonnn/pt-chart-mcp.svg)](https://anlyon.dev/servers/io.github.Tsonnn/pt-chart-mcp)

Source: MCP Registry. Synced Oct 21, 2026, 18:21 UTC.