EyalSec MCP server

EyalSec MCP server

Ask your AI assistant about your EyalSec account in plain words: "what critical events came in since Monday?", "show me the full trace for event 90210", "which machines need an update?". This server gives Claude, Cursor and any other MCP client read access to your events, machines, runs and rules through the EyalSec API, so the assistant you already use for code review can also help you triage what EyalSec found.

<!-- mcp-name: io.github.EyalSec/eyalsec-mcp -->

EyalSec follows untrusted data (requests, files, environment variables and more) through your running program and reports when it reaches a risky operation: a SQL query, a shell command, deserialization, a file path. Each event names the operation, the line of code, the value it received and where the untrusted part came from. This server reads those events; it never changes anything on your account.

What you need

• An EyalSec account and an API key. Create the key on your dashboard under Settings > API access. A read-only key is all this server needs, and it is the one we recommend: see API keys.
• Python 3.10 or newer, or uv, which runs the server without a separate install.

No account yet? Book a live demo and we will set one up with you. Pricing is at eyalsec.com/pricing.

Set it up

The server speaks MCP over stdio. Your client starts it with uvx eyalsec-mcp (or eyalsec-mcp after pipx install eyalsec-mcp) and passes the key in the environment.

Claude Code

claude mcp add eyalsec -e EYALSEC_API_KEY=es2_your_read_only_key -- uvx eyalsec-mcp

Claude Desktop

Add this to claudedesktopconfig.json (Settings > Developer > Edit Config), then restart Claude Desktop:

{
  "mcpServers": {
    "eyalsec": {
      "command": "uvx",
      "args": ["eyalsec-mcp"],
      "env": {
        "EYALSEC_API_KEY": "es2_your_read_only_key"
      }
    }
  }
}

Cursor

Add the same block to ~/.cursor/mcp.json (every project) or .cursor/mcp.json (one project):

{
  "mcpServers": {
    "eyalsec": {
      "command": "uvx",
      "args": ["eyalsec-mcp"],
      "env": {
        "EYALSEC_API_KEY": "es2_your_read_only_key"
      }
    }
  }
}

Docker

docker build -t eyalsec-mcp https://github.com/EyalSec/eyalsec-mcp.git
docker run --rm -i -e EYALSEC_API_KEY=es2_your_read_only_key eyalsec-mcp

Use the second line as the command in any client's configuration.

Any other MCP client

Run uvx eyalsec-mcp as a stdio server with EYALSECAPIKEY set. To check the key before wiring it into a client:

EYALSEC_API_KEY=es2_your_read_only_key uvx eyalsec-mcp --check

It calls the API once and prints the account it reached, the key's scope and the number of machines.

Settings

What it can do

Every tool is a read. The server has no code path that adds, changes or deletes anything, so even a full-access key cannot be used to write through it.

Shortened. The full README is on GitHub.