Vercel MCP now supports the 2026-07-28 MCP specification
Vercel MCP now serves the 2026-07-28 and 2025 protocols from one endpoint, letting newer clients adopt stateless requests and revised authorization without breaking older setups.
Vercel MCP supports the **2026-07-28 specification**, including a stateless request model and updated authorization behavior. Clients that understand it adopt it automatically, while **2025 protocol** clients continue unchanged.
Keep the existing endpoint and setup. A single connection handles both versions through **MCP SDK v2** and mcp-handler 2.x, reducing the need for version-specific server configuration.
Vercel MCP supports the **2026-07-28 specification**, including a stateless request model and updated authorization behavior. Clients that understand it adopt it automatically, while **2025 protocol** clients continue unchanged. Keep the existing endpoint and setup. A single connection handles both versions through **MCP SDK v2** and mcp-handler 2.x, reducing the need for version-specific server configuration. The material names the protocol changes but does not detail their operational consequences. Builders should review the specification changelog before relying on new authorization or stateless behavior in custom clients.
This confirms that Vercel's hosted MCP endpoint has crossed the same stateless SDK v2 boundary as mcp-handler while preserving 2025 clients on one connection. It reduces server-side version branching, but does not establish that custom clients can safely rely on the new authorization or stateless semantics without reading the specification and testing their own lifecycle assumptions.