Stateless MCP 2.0 Released, Inspiring New Developer Tools
The Model Context Protocol (MCP) 2.0 specification has been released, introducing a stateless design that simplifies integration. Developer Simon Willison has leveraged this update to build new tools, including mcp-explorer and datasette-mcp. By removing the need to maintain session state, MCP 2.0 makes building scalable AI agent integrations much easier and more secure than granting agents full shell access. This makes MCP highly viable for smaller, local models that run on personal hardware. Unlike the legacy stateful protocol which required two HTTP requests (one for initialization and one for the tool call), MCP 2.0 executes tool calls in a single HTTP request. This stateless approach eliminates the need for backend servers to track session IDs or route requests to specific machines.
## BACKGROUND
The Model Context Protocol (MCP) is an open standard launched by Anthropic in November 2024 to standardize how AI models connect to external data and tools. While Anthropic's later release of "Skills" in late 2025 offered more flexibility by giving agents terminal access, it introduced significant security risks compared to the controlled environment of MCP.