The Steel Brain MCP server,
connected in one click.
Trade-verified steel grade properties, substitution verdicts, and mill-cert guidance for AI agents. Connect the official Steel Brain MCP server to Claude, ChatGPT, or Cursor through gate — one gateway URL, no config files, security-checked.
Free to start · No credit card · No hosting needed
Add Steel Brain to your AI in one minute
Pick your client. Copy, paste, done — or let gate handle sign-ins and policies for you.
claude mcp add --transport http steel-brain https://api.steelbrain.dev/mcpRun in your terminal, then restart Claude Code.
Steel Brain · https://api.steelbrain.dev/mcp
What your AI can do with Steel Brain
Real prompts you can type the moment it's connected — no setup, no docs to read.
“Use “grade_lookup”: Look up a steel grade: properties, chemistry, forms, applications, weldability. Aliases accepted (e.g. 4140 = 42CrMo4 = SCM440).”
“Use “substitution_check”: Check if one steel grade can substitute another for a given application (machined / welded-structural / pressure). Returns verdict + reasoni.”
“Use “cert_guide”: Which mill cert type applies for a grade + use case (e.g. EH36 shipbuilding), and what fields to check on the cert.”
How secure is the Steel Brain MCP server?
Every server in the gate directory has to pass the same four checks before your AI can touch it. Here's how Steel Brain holds up.
Security grade A
gate scanned 3 tools on Sep 26, 2026 for prompt injection and risky tool definitions — nothing to flag.
Official endpoint
Operated by Steel Brain (steelbrain.dev) at its documented MCP endpoint — not a third-party mirror or community re-host.
No sign-in needed
This server only exposes public data — no account and no credentials are involved when you connect.
Scanned before it goes live
gate checks every tool for prompt injection, hidden instructions, data-exfiltration hints, and over-broad permissions before the server is available through your gateway.
Watched for drift
If Steel Brain adds or changes tools later, gate re-scans and alerts you — before your AI acts on the change.
Connected in three steps
Connect your gate
Add one gateway URL to Claude, ChatGPT, or any MCP client. One-time setup, about two minutes.
Pick Steel Brain
Choose Steel Brain in the gate directory. No sign-in needed.
Use it anywhere
Steel Brain's tools are live in every AI client you've connected — with rules and logging built in.
Free to start · No credit card · No hosting needed
The actual tools Steel Brain exposes
Fetched live from the official endpoint and re-checked daily by gate — not marketing copy.
grade_lookup — Look up a steel grade: properties, chemistry, forms, applications, weldability. Aliases accepted (e.g. 4140 = 42CrMo4 = SCM440).
substitution_check — Check if one steel grade can substitute another for a given application (machined / welded-structural / pressure). Returns verdict + reasoni
cert_guide — Which mill cert type applies for a grade + use case (e.g. EH36 shipbuilding), and what fields to check on the cert.
Who runs the Steel Brain MCP server?
The Steel Brain MCP server at a glance
https://api.steelbrain.dev/mcpQuestions, answered
Is there an official Steel Brain MCP server?
Yes — Steel Brain operates its own remote MCP server at api.steelbrain.dev. gate connects you to that official endpoint and adds security scanning, per-tool access rules, and an activity log on top.
How do I connect Steel Brain to Claude or ChatGPT?
Add gate's gateway URL to your AI client once, then pick Steel Brain in the directory. No account or sign-in is needed. From then on, Steel Brain's tools are available in every client you've connected to gate.
Do I need to host anything?
No. Steel Brain runs the server, and gate is fully managed. You just connect one URL — there's nothing to install, deploy, or maintain.
Is the Steel Brain MCP server safe to connect?
It's the vendor's official endpoint, and gate scans its tools for prompt injection and hidden instructions before it goes live, re-checks it whenever it changes, and lets you allow, block, or require approval for every single tool.
Is it free?
Yes — you can get started with gate for free and connect Steel Brain in minutes. No credit card required.
Connect more than just Steel Brain
Every server below works through the same gateway URL — connect once, add tools anytime.
Squarespace DomainsDesignView →Set up Steel Brain in: Claude · Claude Code · ChatGPT · Cursor · VS Code