When running local stdio servers, you rely on the local user's OS file permissions. But once you deploy an MCP Server to the cloud over HTTP/SSE, you are opening it to the internet.
The 2025 MCP spec formalizes servers as OAuth 2.0 Resource Servers. Before establishing an SSE connection, the Client must authenticate using an Authorization: Bearer <token> header.
🔒 Security Warning: Never expose an HTTP MCP server without robust authentication. If an attacker discovers the endpoint, they can access all Tools and Resources you've exposed natively!
🧪 Knowledge Check
Press 1-4 to select1 of 3
What protocol is standardized for securing remote MCP servers?