Steel Brain

Name: Steel Brain
Author: dryow1

by dryow1version 1.1.0i★ –iComputer or cloud

Registry nameio.github.dryow1/steel-brain

Install

Overview

Description from the maker (original English)

Trade-verified steel grade properties, substitution verdicts, and mill-cert guidance for AI agents.

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
UsageiVery new★ –

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: Computer or cloud
Transport: stdio, Streamable HTTP
Category: Other

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.
The registry lists no key to fill in.

You need

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

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

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

Works in Claude on the web, desktop and mobile:

Open Settings → Connectors
Press Add custom connector
Paste the address below and press Add
If it asks you to sign in, sign in with the maker

https://api.steelbrain.dev/mcp

Or run it on your computer

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "steel-brain": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "ghcr.io/dryow1/steel-brain:1.0.0"
      ]
    }
  }
}

Run this in your terminal

claude mcp add --transport http steel-brain https://api.steelbrain.dev/mcp

Or run it on your computer

claude mcp add steel-brain -- docker run -i --rm ghcr.io/dryow1/steel-brain:1.0.0

Open in Cursor

Or copy the settings yourself

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

{
  "mcpServers": {
    "steel-brain": {
      "url": "https://api.steelbrain.dev/mcp"
    }
  }
}

Or run it on your computer

Open in Cursor

Or copy the settings yourself

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

{
  "mcpServers": {
    "steel-brain": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "ghcr.io/dryow1/steel-brain:1.0.0"
      ]
    }
  }
}

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": {
    "steel-brain": {
      "type": "http",
      "url": "https://api.steelbrain.dev/mcp"
    }
  }
}

Or run it on your computer

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "steel-brain": {
      "type": "stdio",
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "ghcr.io/dryow1/steel-brain:1.0.0"
      ]
    }
  }
}

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.

ChatGPT connects only to servers on the internet:

Open ChatGPT on the web → Settings → Connectors (Apps)
Press Create or Add (some plans need Developer mode under Advanced first)
Paste the address below, give it a name and save
If it asks you to sign in, sign in with the maker

https://api.steelbrain.dev/mcp

Menu names can differ slightly by plan and over time.

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

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 8, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account dryow1, 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 18475 servers in this category
Published to the registry more recently than 52% of the other 18475 servers in this category
Basic checks equal to or better than 100% of the other 18475 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 Steel Brain 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?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

Either way works: install it on your computer or connect to the cloud version.

Is it still maintained?

The GitHub repo last changed –, and the latest version (1.1.0) reached the registry 44 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, Tethered Trust

Alternatives

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Reading a card:↓ Downloads per weeki★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

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by formulahendryEarly↓ 66/wk★ 440Updated 14 months ago

Runs on your computer

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Remote Desktop Commander

Remote Desktop Commander: use files, terminal and processes on your own computers from any AI app.

by desktop-commanderGrowing★ 211Updated 3 days ago

Runs in the cloud✓ desktopcommander.app

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Tethered Trust

Fit, compatibility and recall checks for AI agents before they buy: verdicts, evidence, receipts.

by tetheredtrust.comVery newUpdated today

Runs in the cloud✓ tetheredtrust.com

Install

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.

Steel Brain

An MCP server providing steel domain knowledge to AI agents — grade properties, substitution verdicts, and mill-cert guidance, delivered as MCP tools your agent can call.

Also available as a REST API at https://api.steelbrain.dev.

MCP server

Steel Brain is a Model Context Protocol server. It exposes three MCP tools, over remote streamable HTTP (no install) or local stdio:

MCP Tool	What it does
`grade_lookup`	Properties, chemistry, forms, applications, weldability for a steel grade. Aliases resolved (4140 = 42CrMo4 = SCM440; S355 = ST52).
`substitution_check`	Given from_grade, to_grade, application, returns a verdict (valid / conditional / invalid) with reasoning on whether one grade can substitute another.
`cert_guide`	Which mill certificate applies for a grade + use case (EN 10204 3.1/3.2, class certs ABS/DNV/LR/BV/NK) and what to check.

Remote (no install, free)

Point any MCP client that supports streamable HTTP at:

https://api.steelbrain.dev/mcp

{ "mcpServers": { "steel-brain": { "type": "http", "url": "https://api.steelbrain.dev/mcp" } } }

Claude Code: claude mcp add --transport http steel-brain https://api.steelbrain.dev/mcp

No API key needed. There is a shared daily cap to keep the server healthy.

Local (stdio)

pip install -r requirements.txt python -m steel_brain.mcp_server

Starts the MCP server on stdio transport, ready for any MCP client (Claude Desktop, Claude Code, or any MCP-compatible agent).

Example MCP client config

{ "mcpServers": { "steel-brain": { "command": "python", "args": ["-m", "steel_brain.mcp_server"] } } }

Built with the official MCP SDK (mcp package), registering three tools via the standard MCP tool interface.

Why Steel Brain

LLMs guess at steel. They will tell you 4140 annealed can stand in for 4140 pre-hardened, and scrap the job. Steel Brain answers from a human-verified knowledge base built by a working steel trader, and returns an honest "not in knowledge base" rather than a confident guess.

The valuable part is the substitution and cert logic:

4140RB to 4140QT (annealed vs pre-hardened): invalid, same alloy, opposite heat-treat
316L to 304L for marine: invalid, different corrosion class
EH36 to S355 structural: valid one way, conditional the other
Seamless vs ERW for pressure service: never interchangeable

Coverage

23 grades across carbon, alloy, stainless. Round bar, hollow bar, plate, pipe. 39 substitution rules, 4 cert guides.

REST API (alternative to MCP)

Same knowledge over REST at https://api.steelbrain.dev :

curl "https://api.steelbrain.dev/v1/grade/4140QT" -H "X-API-Key: YOUR_KEY" curl "https://api.steelbrain.dev/v1/substitution?from_grade=316L&to_grade=304L&application=machined" -H "X-API-Key: YOUR_KEY"

Free tier at launch. Contact: dryow.jt@gmail.com

Honesty by design

Grade properties: published-standard ranges (ASTM/EN/JIS/API/ABS), labelled as such.
Substitution + cert logic: trade-verified, dated rulings from a working trader.
Unknown grades: honest "not in knowledge base," never fabricated.

Development

One-command local test setup:

make test

or directly:

bash scripts/test.sh

This creates a .venv (via python3 -m venv .venv) if it doesn't exist yet, installs requirements.txt into it, sets SB_SERVE_UNVERIFIED=1 (needed so the test suite can exercise unverified KB entries), and runs pytest. Works on macOS and Linux. Extra arguments are passed through to pytest, e.g. bash scripts/test.sh tests/test_gate2.py -v.

python -m pytest tests/ # 15 tests (10 acceptance + 5 domain-safety guards)

License

Code: MIT (see LICENSE). Knowledge base (kb/): proprietary (see NOTICE).

Steel Brain

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Or run it on your computer

Or run it on your computer

Or run it on your computer

Or run it on your computer

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

Tethered Trust

README from the maker

Steel Brain

MCP server

Remote (no install, free)

Local (stdio)

Example MCP client config

Why Steel Brain

Coverage

REST API (alternative to MCP)

Honesty by design

Development

License