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ModelContextProtocol (MCP) Java SDK v0.8.0 Specification

@jayessdeesea

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Developer Tools

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jayessdeesea

About ModelContextProtocol (MCP) Java SDK v0.8.0 Specification

Instructions for an AI on how to create a Java based mcp server and client

ModelContextProtocol (MCP) Java SDK v0.8.0 Specification config

No standard config provided

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Overview

What is ModelContextProtocol (MCP) Java SDK v0.8.0 Specification?

The Model Context Protocol (MCP) is a standardized protocol for communication between AI models and external tools or resources. This Java SDK provides a robust implementation, enabling Java applications to create MCP servers that expose tools and resources to AI models, as well as MCP clients that communicate with these servers.

How to use ModelContextProtocol (MCP) Java SDK v0.8.0 Specification?

Add the MCP BOM to your project's dependency management, then include the core mcp artifact. Use the builder pattern to create a McpSyncClient or McpAsyncClient, providing a transport (e.g., StdioClientTransport) and client info. Then call methods like readResource, callTool, listPrompts, or getPrompt. Close the client after use.

Key features of ModelContextProtocol (MCP) Java SDK v0.8.0 Specification

  • Modular architecture with separate transport, protocol, and error‑handling layers
  • Synchronous (McpSyncClient) and asynchronous (McpAsyncClient) client implementations
  • Server implementations (McpSyncServer, McpAsyncServer) for exposing resources and tools
  • Built‑in support for stdio transport; HTTP/SSE transport via Jakarta Servlet API
  • Type‑safe MCP schema classes and error utilities in dedicated packages
  • Full support for reading resources, calling tools, and managing prompts

Use cases of ModelContextProtocol (MCP) Java SDK v0.8.0 Specification

  • Build a Java MCP server that exposes file‑system resources and AI‑assistant tools
  • Create a synchronous client that fetches resources and calls tools from an external MCP server
  • Develop an asynchronous client for non‑blocking interactions with a remote MCP server
  • List and retrieve prompt templates from a server to generate structured AI queries

Frequently asked questions

1

What is the difference between synchronous and asynchronous clients?

`McpSyncClient` blocks on each call, while `McpAsyncClient` returns Reactor `Mono` objects for non‑blocking operation and requires an explicit `initialize().block()` call.

2

What transports are supported out of the box?

The SDK includes `StdioClientTransport` for stdio‑based communication. HTTP/SSE transports require the `jakarta.servlet-api` dependency (version 5.0.0, scope provided).

3

What are the required dependencies?

Use the MCP BOM (`mcp-bom:0.8.0`) for version management, then add the core `mcp` artifact. For HTTP/SSE, include `jakarta.servlet-api:5.0.0`. Testing utilities are in the `mcp-test` artifact.

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