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MCP Observatory

MCP Observatory is an MCP server that adds developer tools to AI assistants such as Claude Desktop, Claude Code and Cursor. MCP security scanner. CI-native testing, attack simulation, health scoring, and SARIF. It has 135 GitHub stars, is released under the MIT license and runs locally with npx -y @kryptosai/mcp-observatory.

github.com/KryptosAI/mcp-observatory (opens in a new tab)

Data as of from the GitHub API and the official MCP registry; description from the project's repository. Report an error

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Install MCP Observatory

Generated from the server's MCP registry entry. Replace your-value with your own values.

Claude Desktop

claude_desktop_config.json
{
  "mcpServers": {
    "mcp-observatory": {
      "command": "npx",
      "args": [
        "-y",
        "@kryptosai/mcp-observatory"
      ]
    }
  }
}

Settings > Developer > Edit Config. macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\. Restart Claude Desktop afterwards.

Claude Code

claude mcp add --transport stdio mcp-observatory -- npx -y @kryptosai/mcp-observatory

Cursor

.cursor/mcp.json
{
  "mcpServers": {
    "mcp-observatory": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@kryptosai/mcp-observatory"
      ]
    }
  }
}

Project file; use ~/.cursor/mcp.json to enable it in every project.

VS Code

.vscode/mcp.json
{
  "servers": {
    "mcp-observatory": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@kryptosai/mcp-observatory"
      ]
    }
  }
}

Config formats checked against the official docs on Oct 7, 2026: modelcontextprotocol.io (opens in a new tab), code.claude.com (opens in a new tab), cursor.com (opens in a new tab), code.visualstudio.com (opens in a new tab).

About MCP Observatory

Free, open-source MCP security testing from ClearFrame. MCP Observatory is the CI-native security tool for teams shipping custom MCP servers. Test during development, catch schema drift, simulate attacks, and generate compliance evidence — before agents depend on your servers.

  • cli
  • mcp
  • model-context-protocol
  • regression-testing
  • ai-agent
  • developer-tools
  • mcp-server
  • schema-drift
  • github-action
  • mcp-security

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FAQ

MCP Observatory FAQ

Still curious? Email info@appsgit.com.

How do I install the MCP Observatory MCP server?

Add the command npx -y @kryptosai/mcp-observatory to your MCP client: put it in claude_desktop_config.json for Claude Desktop, run claude mcp add for Claude Code, or add it to .cursor/mcp.json (Cursor) or .vscode/mcp.json (VS Code). The snippets on this page are ready to paste.

Is MCP Observatory free?

The server is open source under the MIT license, so running it is free. It does not declare any required API key.

Is MCP Observatory actively maintained?

The most recent commit was on Oct 21, 2026. The latest release is v1.50.1, published Oct 21, 2026. appsgit only lists MCP servers with a commit in the last six months.