Package org.apache.juneau.rest.client.mcp

package org.apache.juneau.rest.client.mcp

Revision-neutral Model Context Protocol (MCP) client core - Streamable-HTTP transport orchestration, the auth-token seam, and the pluggable response cache that per-revision McpClient facades build on.

Key types:

• AbstractMcpClient - neutral base class; per-revision McpClient facades extend it
• McpAuthInterceptor - the auth-token seam
• McpResponseCache - the pluggable response-cache SPI
• InMemoryMcpResponseCache - the built-in in-memory cache default
• McpDuplexDispatcher - dispatches server-initiated requests delivered over a client's duplex event-stream channel
• McpServerRequestHandler - the callback registered with McpDuplexDispatcher to handle those requests

Related Packages

Package	Description
org.apache.juneau.rest.client	Next-generation REST client — transport-agnostic HTTP client built on Juneau's serialization stack.
org.apache.juneau.rest.client.mcp.auth	Client-side OAuth 2.1 token acquisition for the Model Context Protocol 2026-07-28 revision.
org.apache.juneau.rest.client.mcp.v20250618	Typed 2025-06-18 Model Context Protocol (MCP) client facade.
org.apache.juneau.rest.client.mcp.v20260728	Typed MCP client adapter for revision 2026-07-28.

Class	Description
AbstractMcpClient	Revision-neutral base class for Model Context Protocol (MCP) clients.
AbstractMcpClient.Builder<SELF extends AbstractMcpClient.Builder<SELF>>	Fluent, self-typed builder for AbstractMcpClient subclasses.
InMemoryMcpResponseCache	Built-in, process-local, in-memory default implementation of McpResponseCache.
McpAuthInterceptor	A builder-configurable auth-token seam implemented as a RestCallInterceptor.
McpDuplexDispatcher	Dispatches server-initiated JSON-RPC requests delivered over an MCP client's duplex event-stream channel to a single registered McpServerRequestHandler.
McpResponseCache	An opt-in, off-by-default response cache for MCP client results.
McpServerRequestHandler	Callback invoked by McpDuplexDispatcher to handle a single server-initiated JSON-RPC request delivered over an MCP client's duplex event-stream channel (for example sampling/createMessage; illustrative only, as sampling is deprecated per SEP-2577).