Platform Example: AI Agents Meet Real Microservices

This example mirrors the micro/blog platform — a real microblogging application built on Go Micro. It demonstrates how existing microservices become AI-accessible through MCP with zero changes to business logic.

Services

Running

go run .

MCP tools available at: http://localhost:3001/mcp/tools

Agent Scenarios

These are realistic multi-step workflows an AI agent can complete:

1. New User Onboarding

"Sign up a new user called carol, then write a welcome post introducing herself"

The agent will: call Signup → use the returned user ID → call Posts.Create

2. Content Creation

"Log in as alice and write a blog post about Go concurrency patterns, then tag it with 'golang' and 'concurrency'"

The agent will: call Login → call Posts.Create → call TagPost twice

3. Social Interaction

"List all posts, find the welcome post, and comment on it as bob saying 'Great to be here!'"

The agent will: call Posts.List → pick the right post → call Comments.Create

4. Cross-Service Workflow

"Send a mail from alice to bob welcoming him, then check bob's inbox to confirm delivery"

The agent will: call Mail.Send → call Mail.Read to verify

5. Platform Overview

"Show me all users, all posts, and all tags currently in use"

The agent will: call Users.List, Posts.List, and ListTags (potentially in parallel)

How It Works

The key insight: you don't need to write any agent-specific code. The MCP gateway discovers services from the registry, extracts tool schemas from Go types, and generates descriptions from doc comments.

service := micro.New("platform",
    micro.Address(":9090"),
    mcp.WithMCP(":3001"),  // This one line makes everything AI-accessible
)

service.Handle(&Users{})
service.Handle(&Posts{})
service.Handle(&Comments{})
service.Handle(&Mail{})

Each handler method becomes an MCP tool. The @example tags in doc comments give agents sample inputs to learn from.

Connecting to Claude Code

Add to your Claude Code MCP config:

{
  "mcpServers": {
    "platform": {
      "command": "curl",
      "args": ["-s", "http://localhost:3001/mcp/tools"]
    }
  }
}

Or use stdio transport:

micro mcp serve --registry mdns

Architecture

Agent (Claude, GPT, etc.)
    │
    ▼
MCP Gateway (:3001)         ← Discovers services, generates tools
    │
    ▼
Go Micro RPC (:9090)        ← Standard service mesh
    │
    ├── UserService          ← Signup, Login, Profile
    ├── PostService          ← CRUD + Tags
    ├── CommentService       ← Threaded comments
    └── MailService          ← Internal messaging

Relation to micro/blog

This example is a simplified, self-contained version of micro/blog. The real platform splits each service into its own binary with protobuf definitions. This example uses Go structs directly for simplicity, but the MCP integration works identically either way — the gateway discovers services from the registry regardless of how they're implemented.