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FastAPI + FastMCP OAuth Authentication with Scalekit

Official

Secure MCP with FastAPI OAuth in production.

Software Engineering#security#fastapi#oauth#middleware#mcp#fastmcp#scalekit
Authorscalekit-inc
Version1.0.0
Installs0

System Documentation

What problem does it solve?

FastAPI + MCP security pattern that enables production-grade OAuth 2.1 Bearer token validation for MCP endpoints using Scalekit, providing middleware-based enforcement and reliable token handling.

Core Features & Use Cases

  • FastAPI middleware that validates Bearer tokens against Scalekit
  • OAuth 2.1 resource metadata endpoint at /.well-known/oauth-protected-resource for client discovery
  • FastMCP tool-style integration enabling plug-and-play MCP tools with authenticated context
  • Real-world use: securing multi-tenant MCP services with scope-based access and audit-ready traces

Quick Start

Start the FastAPI app with MCP integration and point clients to the OAuth metadata endpoint to begin issuing and validating tokens.

Dependency Matrix

Required Modules

None required

Components

Standard package

💻 Claude Code Installation

Recommended: Let Claude install automatically. Simply copy and paste the text below to Claude Code.

Please help me install this Skill:
Name: FastAPI + FastMCP OAuth Authentication with Scalekit
Download link: https://github.com/scalekit-inc/codex-authstack/archive/main.zip#fastapi-fastmcp-oauth-authentication-with-scalekit

Please download this .zip file, extract it, and install it in the .claude/skills/ directory.
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