MCP server · Security
BLACK_WALL MCP server
Your AI checks risky actions first and gets back a risk score, red flags, and a go, caution, or stop call.
BLACK_WALL is a safety helper for AI agents. Before your AI does something you cannot undo, like sending an email, moving money, or deleting data, it asks BLACK_WALL first and gets back a simple verdict. It is handy for anyone who lets an AI take actions on their behalf and wants a second opinion before things go wrong.
What is an MCP server? The 30-second version
On its own, your AI can only chat. An MCP server is a small helper program you connect to your AI so it gains a new skill. This one connects your AI to BLACK_WALL, a service that scores risky actions. Once connected, your AI can ask BLACK_WALL about an action before doing it, and you get a clear answer back in the chat.
What this MCP server does
You tell your AI to check with BLACK_WALL before any action it cannot undo. Your AI calls the forecast tool and describes what it is about to do, like sending an email or running a database command. BLACK_WALL looks at the details and returns a risk score from 0 to 100, a reversibility class, and a recommendation of GO, CAUTION, or STOP. It also lists named red flags, such as a database command that would wipe a whole table. Your AI then decides to go ahead, ask you first, or stop.
Click to zoomWhat you can do with it
- Check an email before your AI sends it
- Score a payment or money transfer before it happens
- Catch a database command that would delete too much
- Flag a file deletion that has no backup
- Review a social media post before it goes live
- Log every risky action in observe mode without blocking anything
- Report back what actually happened after an action ran
Try asking your AI
- “Before you send that email to the client, check it with BLACK_WALL first.”
- “I am about to run this SQL statement. Ask BLACK_WALL if it is safe.”
- “Check this payment of 50000 dollars with BLACK_WALL before you make it.”
- “Use BLACK_WALL to review this post before you publish it.”
What it gives back to you
You get a short verdict in the chat: a recommendation of GO, CAUTION, or STOP, a risk score out of 100, and a reversibility class that says how hard the action would be to undo. It also lists named red flags, like a database command with no filter, and a confidence level. If you set observe mode, it only logs the action and never tells your AI to stop.
Before you start
What you need
- A free BLACK_WALL account and API key from blackwalltier.com (the key looks like bw_live_...)
- An MCP host such as Claude Desktop, Claude Code, Cursor, or Windsurf
- Node.js installed if you use the npx command
Good to know
This tool only gives advice; it does not stop your AI by itself unless your AI is set up to obey the STOP verdict, so make sure your agent is told to check first and stop when asked.
Install it with your AI
Add BLACK_WALL MCP server to your AI, no technical skills needed
You don't install anything by hand. You copy one prompt, paste it into an AI that can work on your computer, and it checks, installs and connects the server for you, asking you when it needs something.
Sign in to get the install prompt
Members get a ready-made prompt that lets the Claude desktop app check BLACK_WALL MCP server, install it and connect it for them, step by step. You don't need any technical skills: you copy, paste and answer a few questions. Your connected AI can also find and install any of the 4,066 MCP servers here for you.
Who it's for
People who let an AI take real actions, like developers, operations staff, and anyone running automated agents that send emails, move money, or touch databases.
