JSON MCP Lite

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:

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

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

Licence

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