How to Understand OAuth Flows Between MCP Server and Client with Cloudflare Workers and MCP Inspector -- Step by Step
When building an MCP Server, providing user-specific tools and services requires user registration and login. Once a user is authenticated, their user ID can be used to query account data or perform more advanced operations. Therefore, user authentication is a crucial step for enabling personalized and in-depth features on the MCP Server. For communication between service interfaces, a common and straightforward authentication method is to include an access token in the Authorization header of the request, using the format: Authorization: Bearer XXXXX. The validity of the AccessToken determines the user’s identity. Typically, the access token is issued by the MCP Server provider after the user has successfully registered with the MCP service. Once obtained, this token can be included in API requests to access authorized features and data on the MCP Server. Deploying the MCP Server as a Cloud Service Cloudflare, as a cloud service provider, offers the ability to build an MCP Server usin...