Langchain4j Mcp Server Patterns
If you're wiring LangChain4j into the Model Context Protocol ecosystem, this gives you the patterns to build Java MCP servers that expose tools, resources, and prompts, plus the client side integration to consume external MCP servers from your AI services. The core value is in the security and filtering guidance: it walks you through narrowing tool surfaces by role or trust level, validating arguments before execution, and failing closed on privileged operations. Most useful when you need to bridge Java based tooling into agentic workflows without accidentally handing your agent the keys to production systems. The examples cover stdio bootstrapping and tool provider filtering, which are the two spots where most integrations go wrong.
- skills.sh installs
- 3.8K
- GitHub stars
- 369
- last updated
- Aug 21, 2026
Install
$ npx -y skills add giuseppe-trisciuoglio/developer-kit --skill langchain4j-mcp-server-patterns --agent claude-codeInstalls into .claude/skills of the current project.
Files
LangChain4j MCP Server Implementation Patterns
Overview
Use this skill to design and implement Model Context Protocol (MCP) integrations with LangChain4j.
The main concerns are:
- defining a clean tool, resource, and prompt surface
- choosing the right transport and bootstrap model
- filtering unsafe capabilities before exposing them to agents or applications
Keep SKILL.md focused on the implementation flow. Use the bundled references for expanded examples and API-level detail.
When to Use
Use this skill when:
- building a Java MCP server that exposes tools, resources, or prompts
- integrating LangChain4j with one or more external MCP servers
- wiring MCP support into a Spring Boot application
- filtering available tools by tenant, user role, or runtime context
- adding observability, resilience, and safe failure handling around MCP interactions
- reviewing an MCP integration for prompt-injection and side-effect risks
Typical trigger phrases include langchain4j mcp, java mcp server, mcp tool provider, spring boot mcp, and connect langchain4j to mcp.
Instructions
1. Design the MCP surface before writing code
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- Repository
- github.com/giuseppe-trisciuoglio/developer-kit
- Categories
- Backend & APIs, AI & Agent Building, Java & JVM
- First seen
- May 16, 2026
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