Permit.io FastMCP Middleware

Example Use Cases

• 1

  Enforce centralized authorization policies on MCP server requests.

• 2

  Implement role-based and attribute-based access control in MCP tools.

• 3

  Secure MCP servers with Permit.io policy enforcement and JWT authentication.

Description

permit-fastmcp is a middleware for FastMCP servers that integrates Permit.io authorization, intercepting MCP requests to enforce access control based on defined policies. It supports role-based and attribute-based access control (ABAC) with tool argument evaluation for fine-grained permissions. The middleware simplifies securing MCP servers by mapping MCP methods and tools to Permit.io resources and actions, enabling centralized policy management and enforcement.