PLC Cloud Sim — LAD/SCL simulation over MCP

Name: PLC Cloud Sim — LAD/SCL simulation over MCP
Author: tia-forge

by tia-forgeversion 0.1.1i★ –iRuns in the cloud

Registry nameio.github.tia-forge/plc-cloud-sim

Install

Overview

Description from the maker (original English)

Cloud PLC simulator: validate and step-run LAD/SCL programs, run scenarios, return PASS/FAIL.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs in the cloud
Transport: Streamable HTTP
Category: Other
You need to fill in: Authorization

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on the maker’s server: what you ask it goes through their server.
You fill in yourself: Authorization

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

Runs in the cloudNothing to install; it connects over the internet

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

This address needs a key in a request header, which the add-connector menu cannot set. Use Claude Code, Cursor or VS Code instead.

Run this in your terminal

claude mcp add --transport http plc-cloud-sim https://tia.hubwiz.com/sim/mcp --header 'Authorization: Bearer {sim_api_key}'

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "plc-cloud-sim": {
      "url": "https://tia.hubwiz.com/sim/mcp",
      "headers": {
        "Authorization": "Bearer {sim_api_key}"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "plc-cloud-sim": {
      "type": "http",
      "url": "https://tia.hubwiz.com/sim/mcp",
      "headers": {
        "Authorization": "Bearer {sim_api_key}"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This address needs a key in a request header, which the add-connector menu cannot set. Use Claude Code, Cursor or VS Code instead.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

Authorization secret required HTTP header
Bearer API key from https://tia.hubwiz.com/sim, format 'Bearer sim_live_...'. WeChat login issues a free key with 100 calls; top-ups are 1000 calls for ¥9.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

We have not read this server’s tool list yet; we check endpoints in rotation.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 6, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account tia-forge, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
… Not checked yet
Endpoint responds
Not checked yet; we check endpoints in rotation
… Not checked yet
Sign-in with OAuth
Not checked yet; we check endpoints in rotation
… Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint

Compared with others in Otheri

More stars than 0% of the other 32464 servers in this category
Published to the registry more recently than 74% of the other 32464 servers in this category
Basic checks equal to or better than 100% of the other 32464 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is PLC Cloud Sim — LAD/SCL simulation over MCP safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

You need to fill in: Authorization

Does it run on my computer or in the cloud?

It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.1.1) reached the registry 13 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.

What can I use instead?

In the same category: Spec Driven Development, Remote Desktop Commander, yontu

Alternatives

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README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

PLC Cloud Sim — MCP server for LAD / SCL simulation

Cloud PLC simulator over MCP by 汇智网 (hubwiz.com). Validate and step-run Ladder (LAD) and SCL programs, run scenario acceptance, get a PASS/FAIL report — without installing TIA Portal.

This repository is documentation and client configuration only. The simulator runs as a

hosted service at tia.hubwiz.com; its implementation is not open source.

Endpoint: https://tia.hubwiz.com/sim/mcp
Transport: Streamable HTTP (stateless, POST JSON-RPC)
Auth: Authorization: Bearer sim_live_… (the X-API-Key header is also accepted)
Dashboard / API keys: https://tia.hubwiz.com/sim
Registry entry: io.github.tia-forge/plc-cloud-sim (official MCP Registry)

What it does

Tool	Purpose
`lad_validate`	Validate one or more LadDoc ladder documents
`lad_simulate`	Run scan cycles with given inputs, read back variables and diagnostics
`lad_run_scenario`	Run a declarative scenario (cases / exhaustive matrix / seeded fuzz / `always` invariants)
`scl_validate`	Parse and validate SCL source
`scl_simulate`	Step-run SCL across scan cycles and read variables back
`scl_run_scenario`	Run a declarative SCL scenario

Semantics match a real PLC scan: contacts, coils, timers/counters, FC/FB calls, jumps, and IF/CASE/FOR/WHILE for SCL. Execution is deterministic and reproducible — the same input yields the same result, so a scenario is usable as a regression test.

Quick start

Claude Code

claude mcp add --transport http sim-cloud https://tia.hubwiz.com/sim/mcp \

--header "Authorization: Bearer sim_live_YOUR_KEY" claude mcp list

Cursor / VS Code / any JSON-configured client

"mcpServers": { "sim-cloud": { "url": "https://tia.hubwiz.com/sim/mcp", "headers": { "Authorization": "Bearer sim_live_YOUR_KEY" } } } }

Ask the agent for something

Validate this SCL block, then run it for two scans with Start=false then Start=true,

and tell me the final value of Motor.

Pricing

WeChat login on the dashboard issues a key immediately: 100 calls free, no signup form.
Top-ups: 1000 calls for ¥9, one-off — no subscription, no monthly fee.
Handshake requests (initialize, tools/list) are free; each tools/call costs 1 call.

Notes

No TIA Portal installation is required — the program text (LadDoc / SCL) is sent to the service. If your policy forbids uploading program text, use an on-premises path instead (see TiaLink for the on-machine gateway).
Related services: LadDoc Cloud (LadDoc → SimaticML), TIA Portal ladder examples.
Documentation license: CC BY 4.0. "TIA Portal", "SIMATIC" and "S7" are trademarks of Siemens AG; this service is an independent third-party tool, not affiliated with or endorsed by Siemens.

PLC Cloud Sim — LAD/SCL simulation over MCP

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Otheri

Common questions

Alternatives

Spec Driven Development

Remote Desktop Commander

yontu

README from the maker

PLC Cloud Sim — MCP server for LAD / SCL simulation

What it does

Quick start

Claude Code

Cursor / VS Code / any JSON-configured client

Ask the agent for something

Pricing

Notes