Configuration Reference

Configuration Reference

Hatago uses a JSON config file (hatago.config.json).

Basic Structure

{
  "$schema": "https://raw.githubusercontent.com/himorishige/hatago-mcp-hub/main/schemas/config.schema.json",
  "version": 1,
  "logLevel": "info",
  "mcpServers": {}
}

Fields

version

• Type: number
• Required

logLevel

• Type: "debug" | "info" | "warn" | "error"
• Default: "info"

mcpServers

• Type: object
• Required: Define local/remote servers

Local Server

{
  "server-id": {
    "command": "npx",
    "args": ["-y", "@modelcontextprotocol/server-filesystem", "."],
    "env": { "KEY": "value" },
    "cwd": "./path",
    "disabled": false,
    "tags": ["dev", "local"]
  }
}

Remote Server

{
  "server-id": {
    "url": "https://api.example.com/mcp",
    "type": "http",
    "headers": { "Authorization": "Bearer ${TOKEN}" },
    "disabled": false,
    "tags": ["production"]
  }
}

Env Expansion

• ${VAR} → expand or error if undefined
• ${VAR:-default} → use default if undefined

Tag Filtering

hatago serve --tags dev,test

Auto-reload Configuration Changes

Built-in watching was removed for simplicity. For auto-reload use a supervisor:

# nodemon
npx nodemon --exec "hatago serve --http" --watch hatago.config.json

# PM2
pm2 start "hatago serve --http" --name hatago --watch hatago.config.json