json-mcp-lite

任意のJSONファイル（製品カタログ、FAQ、価格表）を、1つのコマンドで読み取り専用のMCPサーバーに変換します。stdio経由でlist、search、getツールを公開。キーワード検索、埋め込みなし、APIキー不要、依存関係は2つのみ。Claude Desktop、Claude Code、Cursorに対応。MITライセンス。

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json-mcp-lite

Turn a JSON file into an MCP server in one command, so Claude Desktop, Claude Code, Cursor or any stdio MCP client can browse and search your data.

Give it a catalogue, an FAQ, a price list or a docs index, and it creates three read-only tools:

Tool	What it does
`<name>_list`	List records, with `limit` / `offset` paging
`<name>_search`	Keyword search; every word must match, case-insensitive
`<name>_get`	One record by its id field

MIT licence. Node.js 20+. Two dependencies: the official @modelcontextprotocol/sdk and zod.

Try it

git clone https://github.com/scoretracker4321/json-mcp-lite
cd json-mcp-lite && npm install
npm start          # serves examples/products.json on stdio
npm test

Use it with Claude Desktop or Cursor

{
  "mcpServers": {
    "products": {
      "command": "node",
      "args": [
        "/abs/path/json-mcp-lite/src/server.js",
        "--file", "/abs/path/products.json",
        "--name", "products",
        "--id", "sku",
        "--search", "title,description"
      ]
    }
  }
}

Claude Code:

claude mcp add products -- node /abs/path/json-mcp-lite/src/server.js --file /abs/path/products.json --name products --id sku

Then ask: "Which teas are under ₹400 and in stock?" or "Show me product MUG-001."

Options

Flag	Default	Meaning
`--file`	(required)	The JSON file
`--path`	root	Dot path to the array inside the file, e.g. `data.items`
`--name`	`records`	Tool name prefix: `products` → `products_list`, …
`--id`	`id`	Field used by `<name>_get`
`--search`	all fields	Comma-separated fields that `<name>_search` looks in

Need more than a JSON file?

json-mcp-lite is the free, local, single-file part of MCP Server Kit ($29, one-time). The Kit adds:

Any REST API → MCP tools from its OpenAPI 3 spec: one typed tool per operation, auth injected from env, read-only filter, include/exclude lists
Remote hosting over Streamable HTTP (stateless, proxy-friendly), not only stdio
API-key auth and per-key rate limits, CORS, /health and /tools endpoints
Several sources in one server, set up in one YAML/JSON config file
Docker image, an Express router to mount inside your own app, and deploy guides

	json-mcp-lite	MCP Server Kit
JSON file → list/search/get	✅	✅
stdio (Claude Desktop, Cursor, Claude Code)	✅	✅
OpenAPI / REST API → tools		✅
Remote HTTP server		✅
API keys + rate limits		✅
Multiple sources, config file		✅
Docker + deploy docs		✅
Email support		✅

Licence

MIT. Built by Brain Grain (support@braingrain.in).