Secure the MCP servers you're building. 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.
Also available in Simplified Chinese.
Runtime enforcement: Use mcp-seatbelt to block dangerous MCP tool calls at runtime based on observatory scan results.
Get Started
Step-by-step setup guide · macOS, Windows, Linux · Node.js 20+ and npm (install Node.js LTS).
1. Run your first scan
Open Terminal or PowerShell in your project folder and paste:
npx -y @kryptosai/mcp-observatory@latestThis downloads Observatory and checks your first configured MCP server. With no configured server, it uses an included example. To try only that example, run npx -y @kryptosai/mcp-observatory@latest demo --example.
2. Read the result
The terminal shows the target, grade, findings, and saved receipt path. Failed checks are findings to review, not a request to pay. If connection failed, fix the startup command or credentials and rerun. A demo grade describes the example, not your own server.






