Raw STDIO Communication Example

For a custom client or server implementation, the communication happens using raw JSON-RPC messages over stdin and stdout. Each message must be on a single line and delimited by a newline character.

To invoke a tool, clients send a tools/call request:

{"jsonrpc": "2.0", "id": 4, "method": "tools/call", "params": { "name": "get_colors", "arguments": {"locale": "ru"} }}

{"jsonrpc": "2.0", "id": 2, "method": "tools/list", "params": {}}

Start MCP inspector

npx @modelcontextprotocol/inspector node path/to/server/index.js args...

Configure Claude Desktop

1. Open your Claude Desktop configuration file:

For MacOS:

code ~/Library/Application\ Support/Claude/claude_desktop_config.json

For Windows:

code %AppData%\Claude\claude_desktop_config.json

2. Add or update the configuration:

{
  "mcpServers": {
    "wb-api-mcp": {
      "command": "node",
      "args": [
        "/ABSOLUTE/PATH/TO/YOUR/build/index.js"
      ],
      "env": {
        "WB_API_KEY": "your_wb_api_key"
      }
    }
  }
}

A backslash (\) character must always be escaped as \\ within a JSON string. For example an absolute path in Windows: "C:\\ABSOLUTE\\PATH\\TO\\YOUR\\build\\index.js"

3. Save the file and restart Claude Desktop

Example Usage

import { main } from "wb-api-mcp-test";

main();