Stateless MCP Server Architecture

Stateless protocol does not mean stateless application. It means an MCP request carries enough information to be handled without a required protocol session pinned to one server instance.

State that still exists

• User/application sessions.
• Long-running jobs/tasks.
• Database transactions.
• Conversation state.
• Approvals.

Store durable state in systems designed for it. The transport should not become your state database.

MRTR

Multi Round-Trip Requests support input-required workflows without needing an always-open bidirectional session.