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console.log for your stdio MCP server

mcps-logger 최신버젼 다운로드

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# MCP Server Logger

console.log for your stdio MCP server

[![npm version](https://img.shields.io/npm/v/mcps-logger.svg)](https://www.npmjs.com/package/mcps-logger)
[![License: MIT](https://img.shields.io/badge/License-MIT-blue.svg)](https://opensource.org/licenses/MIT)

## Why?

When developing an MCP (Model Context Protocol) server with stdio transport, console.log interferes with the protocol communication.

For example, this is what you normally get in MCP inspector `npx @modelcontextprotocol/inspector` when calling `console.log` in your MCP server code:
```
Error from MCP server: SyntaxError: Unexpected token S in JSON at position 0
```

## Solution

This package patches the console methods (log, warn, error, debug) and redirects logs to a separate terminal.

https://github.com/user-attachments/assets/33ff367e-74b4-48e8-9f04-0bcafbad5e00

## Usage

Start the logger in a terminal where you want to see the logs:
```shell
npx mcps-logger
```

Install the logger in your MCP server:
```shell
npm install mcps-logger
```

Add it to your MCP server entry file:
```typescript
import "mcps-logger/console";
```

Or if you want to use in development mode only:

```typescript
if (process.env.NODE_ENV !== "production") {
    import("mcps-logger/console");
}
```

mcps-logger

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