McpTransport

type McpTransport = Omit<Transport, "sessionId"> & {
  sessionId?: string;
};

Defined in: src/mcp.ts:19

Widened transport type that accepts MCP transport implementations without requiring explicit casts.

Under exactOptionalPropertyTypes, StreamableHTTPClientTransport is not directly assignable to Transport because its sessionId getter returns string | undefined, while Transport declares sessionId?: string (absent or string, but not explicitly undefined). This type relaxes that constraint so users can pass any MCP transport without as Transport.

Type Declaration

Name	Type	Defined in
sessionId?	string	src/mcp.ts:19