Module gateway 

ZAP MCP Gateway - Full Implementation

A gateway that bridges multiple MCP servers, providing:

• Multi-transport support (stdio, HTTP/SSE, WebSocket)
• Tool/resource/prompt aggregation across servers
• Request routing to correct backend servers
• Health checking and automatic reconnection
• Server lifecycle management

This module implements MCP (Model Context Protocol) gateway functionality allowing ZAP to act as a unified interface to multiple MCP servers.

Structs

Gateway

ZAP MCP Gateway - aggregates multiple MCP servers

HttpTransport

HTTP transport with optional SSE support

JsonRpcError

JSON-RPC 2.0 error

JsonRpcNotification

JSON-RPC 2.0 notification (no id)

JsonRpcRequest

JSON-RPC 2.0 request

JsonRpcResponse

JSON-RPC 2.0 response

McpCapabilities

MCP Server capabilities

McpClient

MCP client for a single server connection

McpPrompt

MCP Prompt definition

McpPromptArgument

MCP Prompt argument

McpResource

MCP Resource definition

McpServerInfo

MCP Server info from initialization

McpTool

MCP Tool definition

PromptsCapability

ResourcesCapability

ServerInfo

Server info returned by list_servers

StdioTransport

Stdio transport for subprocess MCP servers

ToolsCapability

WebSocketTransport

WebSocket transport

Enums

ServerStatus

Server connection status