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Aspen HYSYS MCP servers and AI agent skills

One community MCP server drives Aspen HYSYS on Windows through its COM type library with 51 tools, and starts in a safe mode that only reads and saves cases until you allow writes. A separate Codex skill takes over an existing, converged case for limited edits and reporting. Both were tested on HYSYS V14, and the skill also on V15. AspenTech publishes no HYSYS MCP server, and each project needs a licensed local install.

  • No official AspenTech (Emerson) server yet.
  • 1 MCP server and 1 agent skill listed.
AspenTech (Emerson)1 server · 1 skillChecked 4 Nov 2026

Integrations for Aspen HYSYS

Community and commercial servers

MCP serverCommunity

HYSYS MCP Serverby yuuyo-arobet

51 HYSYS tools over COM; by default it only reads and saves cases, and writes must be switched on.

LocalWindowsNeeds a Aspen HYSYS licenceRead-only or read-write (configurable)6· updated 5 months ago

Agent skills

SkillCommunity

AI-HYSYS-Skillby leoyong1983-spec

A Codex skill for bounded changes to existing Aspen HYSYS cases, with a strict convergence gate.

WindowsNeeds a Aspen HYSYS licence7· updated 8 weeks ago

Listings are sorted by origin, then by recent activity. GitHub data is refreshed nightly. Nothing here is ranked.

How AI connects to Aspen HYSYS

An MCP server or skill can only do what Aspen HYSYS lets programs do. Aspen HYSYS exposes 2 automation interfaces:

  • COM automation (HYSYS type library) (COM automation): HYSYS exposes its cases, streams, unit operations, fluid packages and solver to COM clients on Windows, and both listings here connect through it from native Windows Python with pywin32. An agent working this way edits the same case file you have open: it can read stream conditions and column profiles, change specifications, run the solver and save. The V14 interface has gaps, for example no call to disconnect a stream. AspenTech keeps the object reference in the product help and its login-only Support Center. Documentation
  • Case studies, spreadsheets and Aspen Simulation Workbook (Other): Inside a case, the Case Study tool and the spreadsheet operation vary inputs and collect results without code, and Aspen Simulation Workbook links a case to Excel. The HYSYS server can run case studies you already set up, and the AI-HYSYS-Skill can choose a spreadsheet or Simulation Workbook route instead of direct COM when that suits the case.

What AspenTech (Emerson) offers

HYSYS V15 includes the Aspen Virtual Advisor (AVA), AspenTech's built-in generative AI helper for explaining model results. Emerson's 2026 announcement of AVA as an enterprise platform describes advisors for operations products and a trial site, with no MCP server or external agent access to HYSYS cases mentioned. As of this check, there is nothing official for connecting Claude or another agent to HYSYS.

Checked 4 Nov 2026. Sources: Emerson, AspenTech V15 release (May 2025), Emerson, new industrial AI platform (May 2026)

What you can do with Aspen HYSYS and AI

  • Read every material stream, unit operation and column profile in a case and check the overall mass balance, without changing anything.
  • Change feed conditions or a specification, run the solver and report what moved, once you've switched the server's write mode on.
  • Run a case study that is already set up in the case and return its results as a table.
  • Add and connect equipment in an existing flowsheet, then confirm the case still converges.
  • Take over a converged case for a review-stage process package, with a convergence check before any result is reported.

Taken from the listings' own documentation. Check each listing for exactly what it supports.

Installing

The listings here document setup for Claude Code, Claude Desktop and Codex. Install steps, copied from each project's own documentation, are on each listing's page. Most Aspen HYSYS integrations run on your own computer next to Aspen HYSYS, so you need Aspen HYSYS installed and licensed on the same machine unless the listing says otherwise.

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Questions

Is there an official Aspen HYSYS MCP server?

No. AspenTech's generative AI for HYSYS is the Aspen Virtual Advisor inside the product. The HYSYS MCP server and skill here are independent community projects.

Can an AI agent modify my HYSYS case?

Only if you let it. The yuuyo-arobet server starts with 27 tools that read and save; the remaining tools that change conditions, run solvers or add equipment are blocked until you switch safe mode off. The AI-HYSYS-Skill limits itself to bounded edits of a case that already runs.

Which HYSYS versions work?

The MCP server says V12 or later and was tested on V14. The skill passed basic tests on V14 and V15. Older versions weren't tested.

Is the HYSYS server documentation in English?

The server's README is mainly Japanese with an English summary, and the skill's README mixes English and Chinese. Tool names in both are English.

AI-generated models, drawings and results must be checked by a qualified engineer before use.

Sources (checked 4 Nov 2026): AspenTech, Aspen HYSYS product page · Emerson, AspenTech V15 release (May 2025) · yuuyo-arobet/AspenHYSYS-MCP-Server README · Aspen HYSYS product page

Aspen HYSYS is a trademark of AspenTech (Emerson). Tresca is independent and not affiliated with or endorsed by AspenTech (Emerson).