mcp-bastion-fastmcp 0.1.0

MCP-Bastion security middleware for FastMCP servers. Prompt injection, PII, and rate-limit protection.

mcp-bastion-fastmcp

Security middleware for FastMCP servers powered by MCP-Bastion.

Protect any FastMCP server from prompt injection, PII leakage, and resource exhaustion with a single import.

Install

pip install mcp-bastion-fastmcp

Usage

from mcp.server.fastmcp import FastMCP
from mcp_bastion_fastmcp import secure_fastmcp

mcp = FastMCP("My Secure Server")

# Add MCP-Bastion security to your server
secure_fastmcp(mcp)

@mcp.tool()
def get_weather(city: str) -> str:
    return f"Weather in {city}: 22C, sunny"

if __name__ == "__main__":
    mcp.run(transport="streamable-http")

What it protects

• Scans all tool inputs for prompt injection
• Rate limits per session (15 calls, 60s timeout)
• Content filtering on inputs and outputs

License

MIT